./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe036.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe036.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe036.i ./goblint.2024-06-19_11-23-25.files/protection/safe036.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 15:59:07,340 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 15:59:07,403 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 15:59:07,408 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 15:59:07,409 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 15:59:07,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 15:59:07,432 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 15:59:07,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 15:59:07,433 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 15:59:07,436 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 15:59:07,437 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 15:59:07,437 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 15:59:07,438 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 15:59:07,439 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 15:59:07,439 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 15:59:07,439 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 15:59:07,439 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 15:59:07,440 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 15:59:07,440 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 15:59:07,440 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 15:59:07,440 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 15:59:07,441 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 15:59:07,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 15:59:07,441 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 15:59:07,442 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 15:59:07,442 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 15:59:07,442 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 15:59:07,442 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 15:59:07,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 15:59:07,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 15:59:07,444 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 15:59:07,444 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 15:59:07,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:59:07,444 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 15:59:07,445 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 15:59:07,445 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 15:59:07,445 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 15:59:07,445 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 15:59:07,445 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 15:59:07,446 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 15:59:07,446 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 15:59:07,446 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 15:59:07,446 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 15:59:07,447 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 15:59:07,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 15:59:07,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 15:59:07,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 15:59:07,676 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 15:59:07,676 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 15:59:07,678 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe036.yml/witness.yml [2024-06-21 15:59:07,789 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 15:59:07,789 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 15:59:07,790 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-21 15:59:08,903 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 15:59:09,138 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 15:59:09,138 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-21 15:59:09,155 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a3f1526/1a50fbb8c791404c85b269b79d71b641/FLAG0630ddf8a [2024-06-21 15:59:09,164 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a3f1526/1a50fbb8c791404c85b269b79d71b641 [2024-06-21 15:59:09,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 15:59:09,166 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 15:59:09,167 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 15:59:09,167 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 15:59:09,172 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 15:59:09,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:59:07" (1/2) ... [2024-06-21 15:59:09,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442debbb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:59:09, skipping insertion in model container [2024-06-21 15:59:09,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:59:07" (1/2) ... [2024-06-21 15:59:09,175 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@b838b91 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:59:09, skipping insertion in model container [2024-06-21 15:59:09,175 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:59:09" (2/2) ... [2024-06-21 15:59:09,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442debbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09, skipping insertion in model container [2024-06-21 15:59:09,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:59:09" (2/2) ... [2024-06-21 15:59:09,178 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 15:59:09,204 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 15:59:09,205 INFO L97 edCorrectnessWitness]: Location invariant before [L768-L768] ((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 15:59:09,205 INFO L97 edCorrectnessWitness]: Location invariant before [L767-L767] ((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 15:59:09,205 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 15:59:09,206 INFO L106 edCorrectnessWitness]: ghost_update [L765-L765] multithreaded = 1; [2024-06-21 15:59:09,245 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 15:59:09,552 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:59:09,562 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 15:59:09,663 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:59:09,685 INFO L206 MainTranslator]: Completed translation [2024-06-21 15:59:09,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09 WrapperNode [2024-06-21 15:59:09,686 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 15:59:09,686 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 15:59:09,686 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 15:59:09,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 15:59:09,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (1/1) ... [2024-06-21 15:59:09,699 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (1/1) ... [2024-06-21 15:59:09,715 INFO L138 Inliner]: procedures = 174, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 57 [2024-06-21 15:59:09,715 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 15:59:09,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 15:59:09,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 15:59:09,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 15:59:09,723 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (1/1) ... [2024-06-21 15:59:09,728 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (1/1) ... [2024-06-21 15:59:09,731 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (1/1) ... [2024-06-21 15:59:09,740 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 15:59:09,740 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (1/1) ... [2024-06-21 15:59:09,740 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (1/1) ... [2024-06-21 15:59:09,743 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (1/1) ... [2024-06-21 15:59:09,744 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (1/1) ... [2024-06-21 15:59:09,745 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (1/1) ... [2024-06-21 15:59:09,746 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (1/1) ... [2024-06-21 15:59:09,747 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 15:59:09,748 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 15:59:09,748 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 15:59:09,748 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 15:59:09,748 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (1/1) ... [2024-06-21 15:59:09,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:59:09,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 15:59:09,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 15:59:09,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 15:59:09,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 15:59:09,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 15:59:09,796 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 15:59:09,796 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 15:59:09,796 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 15:59:09,797 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 15:59:09,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 15:59:09,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 15:59:09,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 15:59:09,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 15:59:09,798 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 15:59:09,889 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 15:59:09,890 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 15:59:09,993 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 15:59:09,993 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 15:59:10,056 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 15:59:10,056 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 15:59:10,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:59:10 BoogieIcfgContainer [2024-06-21 15:59:10,057 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 15:59:10,058 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 15:59:10,058 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 15:59:10,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 15:59:10,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:59:07" (1/4) ... [2024-06-21 15:59:10,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e161f9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:59:10, skipping insertion in model container [2024-06-21 15:59:10,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 03:59:09" (2/4) ... [2024-06-21 15:59:10,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e161f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:59:10, skipping insertion in model container [2024-06-21 15:59:10,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:59:09" (3/4) ... [2024-06-21 15:59:10,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e161f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:59:10, skipping insertion in model container [2024-06-21 15:59:10,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:59:10" (4/4) ... [2024-06-21 15:59:10,068 INFO L112 eAbstractionObserver]: Analyzing ICFG safe036.i [2024-06-21 15:59:10,082 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 15:59:10,082 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 15:59:10,082 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 15:59:10,121 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 15:59:10,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 15:59:10,188 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-21 15:59:10,190 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:59:10,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 15:59:10,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 15:59:10,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-21 15:59:10,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 15:59:10,211 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;@e87b489, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 15:59:10,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 15:59:10,214 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 15:59:10,214 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 15:59:10,215 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:59:10,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:10,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 15:59:10,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:10,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:10,219 INFO L85 PathProgramCache]: Analyzing trace with hash 191623985, now seen corresponding path program 1 times [2024-06-21 15:59:10,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:10,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015522868] [2024-06-21 15:59:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:10,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:10,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:10,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015522868] [2024-06-21 15:59:10,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015522868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:10,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:10,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 15:59:10,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670766335] [2024-06-21 15:59:10,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:10,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 15:59:10,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 15:59:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 15:59:10,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 31 [2024-06-21 15:59:10,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 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) [2024-06-21 15:59:10,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:10,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 31 [2024-06-21 15:59:10,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:10,651 INFO L124 PetriNetUnfolderBase]: 66/165 cut-off events. [2024-06-21 15:59:10,651 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-21 15:59:10,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 165 events. 66/165 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 651 event pairs, 33 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 297. Up to 124 conditions per place. [2024-06-21 15:59:10,656 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 17 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 15:59:10,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 107 flow [2024-06-21 15:59:10,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 15:59:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 15:59:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-06-21 15:59:10,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7204301075268817 [2024-06-21 15:59:10,667 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 67 transitions. [2024-06-21 15:59:10,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 107 flow [2024-06-21 15:59:10,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 104 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 15:59:10,670 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-21 15:59:10,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-21 15:59:10,675 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-21 15:59:10,675 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-21 15:59:10,675 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) [2024-06-21 15:59:10,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:10,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:10,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 15:59:10,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:10,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash -532916464, now seen corresponding path program 1 times [2024-06-21 15:59:10,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:10,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519598779] [2024-06-21 15:59:10,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:10,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:10,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:10,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519598779] [2024-06-21 15:59:10,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519598779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:10,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:10,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:59:10,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205231069] [2024-06-21 15:59:10,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:10,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:59:10,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:10,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:59:10,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:59:10,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-06-21 15:59:10,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:10,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:10,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-06-21 15:59:10,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:10,928 INFO L124 PetriNetUnfolderBase]: 80/182 cut-off events. [2024-06-21 15:59:10,928 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-06-21 15:59:10,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 182 events. 80/182 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 718 event pairs, 34 based on Foata normal form. 2/177 useless extension candidates. Maximal degree in co-relation 392. Up to 139 conditions per place. [2024-06-21 15:59:10,930 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 22 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-21 15:59:10,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 151 flow [2024-06-21 15:59:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:59:10,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:59:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-06-21 15:59:10,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6854838709677419 [2024-06-21 15:59:10,931 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 85 transitions. [2024-06-21 15:59:10,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 151 flow [2024-06-21 15:59:10,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 15:59:10,933 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-21 15:59:10,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-21 15:59:10,934 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-21 15:59:10,934 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-21 15:59:10,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:10,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:10,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:10,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 15:59:10,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:10,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1765335485, now seen corresponding path program 1 times [2024-06-21 15:59:10,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:10,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196993704] [2024-06-21 15:59:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:10,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:11,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:11,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196993704] [2024-06-21 15:59:11,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196993704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:11,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:11,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:59:11,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513794504] [2024-06-21 15:59:11,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:11,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:59:11,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:11,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:59:11,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:59:11,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-06-21 15:59:11,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:11,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:11,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-06-21 15:59:11,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:11,120 INFO L124 PetriNetUnfolderBase]: 79/184 cut-off events. [2024-06-21 15:59:11,120 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-06-21 15:59:11,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 184 events. 79/184 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 704 event pairs, 34 based on Foata normal form. 1/176 useless extension candidates. Maximal degree in co-relation 443. Up to 145 conditions per place. [2024-06-21 15:59:11,122 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 21 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2024-06-21 15:59:11,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 165 flow [2024-06-21 15:59:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:59:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:59:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-06-21 15:59:11,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6532258064516129 [2024-06-21 15:59:11,123 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 4 states and 81 transitions. [2024-06-21 15:59:11,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 165 flow [2024-06-21 15:59:11,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 156 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 15:59:11,125 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 111 flow [2024-06-21 15:59:11,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-06-21 15:59:11,126 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-06-21 15:59:11,126 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 111 flow [2024-06-21 15:59:11,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:11,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:11,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:11,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 15:59:11,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:11,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:11,127 INFO L85 PathProgramCache]: Analyzing trace with hash 766802660, now seen corresponding path program 1 times [2024-06-21 15:59:11,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:11,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97151084] [2024-06-21 15:59:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:11,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:11,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:11,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97151084] [2024-06-21 15:59:11,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97151084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:11,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:11,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:11,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915594003] [2024-06-21 15:59:11,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:11,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:11,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:11,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:11,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:11,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:11,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 111 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-21 15:59:11,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:11,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:11,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:11,315 INFO L124 PetriNetUnfolderBase]: 95/212 cut-off events. [2024-06-21 15:59:11,315 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-06-21 15:59:11,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 212 events. 95/212 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 796 event pairs, 13 based on Foata normal form. 4/214 useless extension candidates. Maximal degree in co-relation 538. Up to 138 conditions per place. [2024-06-21 15:59:11,317 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 29 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-21 15:59:11,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 44 transitions, 219 flow [2024-06-21 15:59:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 15:59:11,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182795698924731 [2024-06-21 15:59:11,319 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 111 flow. Second operand 6 states and 115 transitions. [2024-06-21 15:59:11,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 44 transitions, 219 flow [2024-06-21 15:59:11,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 210 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 15:59:11,321 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 127 flow [2024-06-21 15:59:11,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2024-06-21 15:59:11,322 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-21 15:59:11,322 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 127 flow [2024-06-21 15:59:11,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-21 15:59:11,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:11,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:11,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 15:59:11,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:11,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:11,323 INFO L85 PathProgramCache]: Analyzing trace with hash -515630260, now seen corresponding path program 1 times [2024-06-21 15:59:11,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:11,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596560803] [2024-06-21 15:59:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:11,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:11,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:11,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596560803] [2024-06-21 15:59:11,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596560803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:11,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:11,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:59:11,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605503045] [2024-06-21 15:59:11,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:11,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:59:11,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:11,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:59:11,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:59:11,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:11,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:11,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:11,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:11,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:11,476 INFO L124 PetriNetUnfolderBase]: 98/218 cut-off events. [2024-06-21 15:59:11,476 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-21 15:59:11,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 218 events. 98/218 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 835 event pairs, 25 based on Foata normal form. 1/216 useless extension candidates. Maximal degree in co-relation 602. Up to 160 conditions per place. [2024-06-21 15:59:11,478 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 29 selfloop transitions, 10 changer transitions 0/46 dead transitions. [2024-06-21 15:59:11,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 255 flow [2024-06-21 15:59:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:59:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:59:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-21 15:59:11,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6387096774193548 [2024-06-21 15:59:11,480 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 127 flow. Second operand 5 states and 99 transitions. [2024-06-21 15:59:11,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 255 flow [2024-06-21 15:59:11,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 46 transitions, 239 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 15:59:11,482 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 164 flow [2024-06-21 15:59:11,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 15:59:11,482 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-21 15:59:11,483 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 164 flow [2024-06-21 15:59:11,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:11,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:11,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:11,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 15:59:11,483 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:11,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash 348203314, now seen corresponding path program 2 times [2024-06-21 15:59:11,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:11,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628355461] [2024-06-21 15:59:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:11,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:11,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628355461] [2024-06-21 15:59:11,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628355461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:11,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:11,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:59:11,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470178249] [2024-06-21 15:59:11,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:11,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:59:11,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:11,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:59:11,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:59:11,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:11,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:11,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:11,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:11,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:11,632 INFO L124 PetriNetUnfolderBase]: 96/213 cut-off events. [2024-06-21 15:59:11,632 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2024-06-21 15:59:11,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 213 events. 96/213 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 809 event pairs, 28 based on Foata normal form. 1/210 useless extension candidates. Maximal degree in co-relation 640. Up to 158 conditions per place. [2024-06-21 15:59:11,634 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 25 selfloop transitions, 10 changer transitions 0/42 dead transitions. [2024-06-21 15:59:11,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 248 flow [2024-06-21 15:59:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:59:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:59:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-21 15:59:11,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6129032258064516 [2024-06-21 15:59:11,635 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 164 flow. Second operand 5 states and 95 transitions. [2024-06-21 15:59:11,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 248 flow [2024-06-21 15:59:11,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 244 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 15:59:11,638 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 185 flow [2024-06-21 15:59:11,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2024-06-21 15:59:11,639 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2024-06-21 15:59:11,639 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 185 flow [2024-06-21 15:59:11,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:11,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:11,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:11,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 15:59:11,640 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:11,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash 341558557, now seen corresponding path program 1 times [2024-06-21 15:59:11,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:11,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550638495] [2024-06-21 15:59:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:11,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:11,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:11,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550638495] [2024-06-21 15:59:11,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550638495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:11,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:11,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:11,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578476050] [2024-06-21 15:59:11,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:11,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:11,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:11,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:11,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:11,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:11,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:11,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:11,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:11,817 INFO L124 PetriNetUnfolderBase]: 99/223 cut-off events. [2024-06-21 15:59:11,817 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-21 15:59:11,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 223 events. 99/223 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 868 event pairs, 23 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 690. Up to 160 conditions per place. [2024-06-21 15:59:11,818 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 35 selfloop transitions, 9 changer transitions 0/51 dead transitions. [2024-06-21 15:59:11,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 313 flow [2024-06-21 15:59:11,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 15:59:11,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182795698924731 [2024-06-21 15:59:11,819 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 185 flow. Second operand 6 states and 115 transitions. [2024-06-21 15:59:11,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 313 flow [2024-06-21 15:59:11,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 51 transitions, 291 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:11,821 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 198 flow [2024-06-21 15:59:11,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2024-06-21 15:59:11,822 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2024-06-21 15:59:11,822 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 198 flow [2024-06-21 15:59:11,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:11,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:11,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:11,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 15:59:11,823 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:11,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:11,823 INFO L85 PathProgramCache]: Analyzing trace with hash -34985861, now seen corresponding path program 2 times [2024-06-21 15:59:11,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:11,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552634097] [2024-06-21 15:59:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:11,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:11,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:11,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552634097] [2024-06-21 15:59:11,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552634097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:11,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:11,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:11,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617571818] [2024-06-21 15:59:11,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:11,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:11,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:11,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:11,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:11,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:11,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:11,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:11,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:11,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:11,971 INFO L124 PetriNetUnfolderBase]: 102/229 cut-off events. [2024-06-21 15:59:11,971 INFO L125 PetriNetUnfolderBase]: For 631/631 co-relation queries the response was YES. [2024-06-21 15:59:11,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 229 events. 102/229 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 897 event pairs, 24 based on Foata normal form. 1/227 useless extension candidates. Maximal degree in co-relation 745. Up to 149 conditions per place. [2024-06-21 15:59:11,973 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 30 selfloop transitions, 16 changer transitions 0/53 dead transitions. [2024-06-21 15:59:11,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 53 transitions, 354 flow [2024-06-21 15:59:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 15:59:11,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6290322580645161 [2024-06-21 15:59:11,974 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 198 flow. Second operand 6 states and 117 transitions. [2024-06-21 15:59:11,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 53 transitions, 354 flow [2024-06-21 15:59:11,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 335 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:11,976 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 244 flow [2024-06-21 15:59:11,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-06-21 15:59:11,976 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2024-06-21 15:59:11,976 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 244 flow [2024-06-21 15:59:11,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:11,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:11,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:11,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 15:59:11,977 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:11,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:11,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1599406133, now seen corresponding path program 1 times [2024-06-21 15:59:11,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:11,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389215072] [2024-06-21 15:59:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:11,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:12,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:12,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389215072] [2024-06-21 15:59:12,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389215072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:12,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:12,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:12,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887610094] [2024-06-21 15:59:12,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:12,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:12,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:12,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:12,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:12,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:12,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 244 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:12,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:12,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:12,130 INFO L124 PetriNetUnfolderBase]: 105/235 cut-off events. [2024-06-21 15:59:12,131 INFO L125 PetriNetUnfolderBase]: For 826/826 co-relation queries the response was YES. [2024-06-21 15:59:12,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 235 events. 105/235 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 919 event pairs, 24 based on Foata normal form. 1/232 useless extension candidates. Maximal degree in co-relation 807. Up to 161 conditions per place. [2024-06-21 15:59:12,132 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 36 selfloop transitions, 14 changer transitions 0/57 dead transitions. [2024-06-21 15:59:12,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 57 transitions, 402 flow [2024-06-21 15:59:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:12,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 15:59:12,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6290322580645161 [2024-06-21 15:59:12,133 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 244 flow. Second operand 6 states and 117 transitions. [2024-06-21 15:59:12,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 57 transitions, 402 flow [2024-06-21 15:59:12,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 57 transitions, 384 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 15:59:12,136 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 279 flow [2024-06-21 15:59:12,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-06-21 15:59:12,137 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-21 15:59:12,137 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 279 flow [2024-06-21 15:59:12,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:12,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:12,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 15:59:12,137 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:12,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:12,138 INFO L85 PathProgramCache]: Analyzing trace with hash -550270371, now seen corresponding path program 3 times [2024-06-21 15:59:12,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:12,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100593159] [2024-06-21 15:59:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:12,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:12,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:12,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100593159] [2024-06-21 15:59:12,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100593159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:12,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:12,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:12,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459711518] [2024-06-21 15:59:12,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:12,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:12,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:12,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:12,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:12,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:12,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:12,267 INFO L124 PetriNetUnfolderBase]: 103/228 cut-off events. [2024-06-21 15:59:12,267 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2024-06-21 15:59:12,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 228 events. 103/228 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 907 event pairs, 30 based on Foata normal form. 1/223 useless extension candidates. Maximal degree in co-relation 840. Up to 152 conditions per place. [2024-06-21 15:59:12,269 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 30 selfloop transitions, 16 changer transitions 0/53 dead transitions. [2024-06-21 15:59:12,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 387 flow [2024-06-21 15:59:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:12,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 15:59:12,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075268817204301 [2024-06-21 15:59:12,270 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 279 flow. Second operand 6 states and 113 transitions. [2024-06-21 15:59:12,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 387 flow [2024-06-21 15:59:12,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 53 transitions, 371 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 15:59:12,272 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 300 flow [2024-06-21 15:59:12,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-06-21 15:59:12,273 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2024-06-21 15:59:12,273 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 300 flow [2024-06-21 15:59:12,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:12,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:12,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 15:59:12,274 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:12,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:12,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2076310427, now seen corresponding path program 2 times [2024-06-21 15:59:12,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:12,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48783363] [2024-06-21 15:59:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:12,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:12,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:12,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48783363] [2024-06-21 15:59:12,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48783363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:12,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:12,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:12,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76882076] [2024-06-21 15:59:12,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:12,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:12,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:12,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:12,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:12,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 300 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:12,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:12,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:12,415 INFO L124 PetriNetUnfolderBase]: 106/238 cut-off events. [2024-06-21 15:59:12,416 INFO L125 PetriNetUnfolderBase]: For 1180/1180 co-relation queries the response was YES. [2024-06-21 15:59:12,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 238 events. 106/238 cut-off events. For 1180/1180 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 953 event pairs, 26 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 906. Up to 162 conditions per place. [2024-06-21 15:59:12,417 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 33 selfloop transitions, 16 changer transitions 0/56 dead transitions. [2024-06-21 15:59:12,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 56 transitions, 448 flow [2024-06-21 15:59:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 15:59:12,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6129032258064516 [2024-06-21 15:59:12,419 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 300 flow. Second operand 6 states and 114 transitions. [2024-06-21 15:59:12,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 56 transitions, 448 flow [2024-06-21 15:59:12,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 56 transitions, 407 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:12,422 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 308 flow [2024-06-21 15:59:12,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2024-06-21 15:59:12,422 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2024-06-21 15:59:12,422 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 308 flow [2024-06-21 15:59:12,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:12,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:12,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 15:59:12,423 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:12,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:12,423 INFO L85 PathProgramCache]: Analyzing trace with hash 318965921, now seen corresponding path program 3 times [2024-06-21 15:59:12,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:12,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549292484] [2024-06-21 15:59:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:12,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:12,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:12,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549292484] [2024-06-21 15:59:12,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549292484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:12,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:12,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:12,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960901976] [2024-06-21 15:59:12,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:12,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:12,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:12,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:12,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:12,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:12,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:12,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:12,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:12,575 INFO L124 PetriNetUnfolderBase]: 104/238 cut-off events. [2024-06-21 15:59:12,575 INFO L125 PetriNetUnfolderBase]: For 1234/1234 co-relation queries the response was YES. [2024-06-21 15:59:12,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 238 events. 104/238 cut-off events. For 1234/1234 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 970 event pairs, 22 based on Foata normal form. 1/237 useless extension candidates. Maximal degree in co-relation 899. Up to 181 conditions per place. [2024-06-21 15:59:12,577 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 39 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2024-06-21 15:59:12,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 420 flow [2024-06-21 15:59:12,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 15:59:12,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860215053763441 [2024-06-21 15:59:12,578 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 308 flow. Second operand 6 states and 109 transitions. [2024-06-21 15:59:12,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 420 flow [2024-06-21 15:59:12,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 381 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:12,581 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 292 flow [2024-06-21 15:59:12,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2024-06-21 15:59:12,581 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-21 15:59:12,581 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 292 flow [2024-06-21 15:59:12,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:12,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:12,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 15:59:12,582 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:12,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:12,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2084892219, now seen corresponding path program 1 times [2024-06-21 15:59:12,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:12,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658575031] [2024-06-21 15:59:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:12,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:12,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:12,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658575031] [2024-06-21 15:59:12,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658575031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:12,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:12,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:12,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816627104] [2024-06-21 15:59:12,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:12,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:12,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:12,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:12,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:12,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 292 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:12,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:12,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:12,736 INFO L124 PetriNetUnfolderBase]: 101/233 cut-off events. [2024-06-21 15:59:12,736 INFO L125 PetriNetUnfolderBase]: For 1320/1320 co-relation queries the response was YES. [2024-06-21 15:59:12,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 233 events. 101/233 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 924 event pairs, 21 based on Foata normal form. 2/233 useless extension candidates. Maximal degree in co-relation 857. Up to 173 conditions per place. [2024-06-21 15:59:12,737 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 41 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-21 15:59:12,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 56 transitions, 408 flow [2024-06-21 15:59:12,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:12,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 15:59:12,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-21 15:59:12,738 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 292 flow. Second operand 6 states and 108 transitions. [2024-06-21 15:59:12,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 56 transitions, 408 flow [2024-06-21 15:59:12,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 371 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:12,742 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 275 flow [2024-06-21 15:59:12,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2024-06-21 15:59:12,742 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-06-21 15:59:12,742 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 275 flow [2024-06-21 15:59:12,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:12,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:12,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 15:59:12,743 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:12,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:12,743 INFO L85 PathProgramCache]: Analyzing trace with hash 454568410, now seen corresponding path program 1 times [2024-06-21 15:59:12,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:12,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228648380] [2024-06-21 15:59:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:12,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228648380] [2024-06-21 15:59:12,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228648380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:12,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:12,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:12,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483748902] [2024-06-21 15:59:12,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:12,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:12,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:12,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:12,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 275 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:12,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:12,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:12,942 INFO L124 PetriNetUnfolderBase]: 112/254 cut-off events. [2024-06-21 15:59:12,942 INFO L125 PetriNetUnfolderBase]: For 1668/1668 co-relation queries the response was YES. [2024-06-21 15:59:12,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 254 events. 112/254 cut-off events. For 1668/1668 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1046 event pairs, 9 based on Foata normal form. 2/254 useless extension candidates. Maximal degree in co-relation 955. Up to 150 conditions per place. [2024-06-21 15:59:12,944 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 49 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-21 15:59:12,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 68 transitions, 481 flow [2024-06-21 15:59:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 15:59:12,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5967741935483871 [2024-06-21 15:59:12,945 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 275 flow. Second operand 8 states and 148 transitions. [2024-06-21 15:59:12,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 68 transitions, 481 flow [2024-06-21 15:59:12,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 463 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:12,948 INFO L231 Difference]: Finished difference. Result has 66 places, 50 transitions, 303 flow [2024-06-21 15:59:12,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=66, PETRI_TRANSITIONS=50} [2024-06-21 15:59:12,949 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2024-06-21 15:59:12,949 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 50 transitions, 303 flow [2024-06-21 15:59:12,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:12,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:12,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 15:59:12,950 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:12,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:12,950 INFO L85 PathProgramCache]: Analyzing trace with hash 454628860, now seen corresponding path program 2 times [2024-06-21 15:59:12,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:12,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773818463] [2024-06-21 15:59:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:12,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:13,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:13,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773818463] [2024-06-21 15:59:13,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773818463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:13,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:13,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:13,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791225905] [2024-06-21 15:59:13,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:13,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:13,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:13,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:13,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:13,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:13,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 50 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:13,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:13,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:13,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:13,164 INFO L124 PetriNetUnfolderBase]: 109/249 cut-off events. [2024-06-21 15:59:13,164 INFO L125 PetriNetUnfolderBase]: For 1744/1744 co-relation queries the response was YES. [2024-06-21 15:59:13,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 249 events. 109/249 cut-off events. For 1744/1744 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1020 event pairs, 19 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 948. Up to 174 conditions per place. [2024-06-21 15:59:13,166 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 15:59:13,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 455 flow [2024-06-21 15:59:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 15:59:13,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036866359447005 [2024-06-21 15:59:13,167 INFO L175 Difference]: Start difference. First operand has 66 places, 50 transitions, 303 flow. Second operand 7 states and 131 transitions. [2024-06-21 15:59:13,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 455 flow [2024-06-21 15:59:13,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 65 transitions, 431 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:13,170 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 303 flow [2024-06-21 15:59:13,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2024-06-21 15:59:13,172 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-06-21 15:59:13,172 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 303 flow [2024-06-21 15:59:13,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:13,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:13,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:13,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 15:59:13,173 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:13,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:13,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1789876996, now seen corresponding path program 1 times [2024-06-21 15:59:13,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:13,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219118173] [2024-06-21 15:59:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:13,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:13,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:13,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219118173] [2024-06-21 15:59:13,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219118173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:13,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:13,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:13,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670908490] [2024-06-21 15:59:13,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:13,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:13,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:13,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:13,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:13,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:13,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:13,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:13,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:13,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:13,374 INFO L124 PetriNetUnfolderBase]: 112/256 cut-off events. [2024-06-21 15:59:13,375 INFO L125 PetriNetUnfolderBase]: For 1828/1828 co-relation queries the response was YES. [2024-06-21 15:59:13,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 256 events. 112/256 cut-off events. For 1828/1828 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1060 event pairs, 18 based on Foata normal form. 1/255 useless extension candidates. Maximal degree in co-relation 980. Up to 182 conditions per place. [2024-06-21 15:59:13,377 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 48 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-21 15:59:13,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 66 transitions, 469 flow [2024-06-21 15:59:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 15:59:13,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036866359447005 [2024-06-21 15:59:13,378 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 303 flow. Second operand 7 states and 131 transitions. [2024-06-21 15:59:13,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 66 transitions, 469 flow [2024-06-21 15:59:13,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 447 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:13,382 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 326 flow [2024-06-21 15:59:13,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=326, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2024-06-21 15:59:13,382 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2024-06-21 15:59:13,383 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 326 flow [2024-06-21 15:59:13,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:13,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:13,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:13,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 15:59:13,384 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:13,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash 396715564, now seen corresponding path program 3 times [2024-06-21 15:59:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:13,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310942858] [2024-06-21 15:59:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:13,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:13,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:13,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310942858] [2024-06-21 15:59:13,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310942858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:13,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:13,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:13,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350260392] [2024-06-21 15:59:13,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:13,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:13,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:13,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:13,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:13,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:13,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:13,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:13,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:13,549 INFO L124 PetriNetUnfolderBase]: 116/263 cut-off events. [2024-06-21 15:59:13,549 INFO L125 PetriNetUnfolderBase]: For 2202/2202 co-relation queries the response was YES. [2024-06-21 15:59:13,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1073 conditions, 263 events. 116/263 cut-off events. For 2202/2202 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1102 event pairs, 19 based on Foata normal form. 2/262 useless extension candidates. Maximal degree in co-relation 1041. Up to 172 conditions per place. [2024-06-21 15:59:13,551 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 41 selfloop transitions, 17 changer transitions 0/65 dead transitions. [2024-06-21 15:59:13,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 65 transitions, 480 flow [2024-06-21 15:59:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 15:59:13,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6082949308755761 [2024-06-21 15:59:13,552 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 326 flow. Second operand 7 states and 132 transitions. [2024-06-21 15:59:13,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 65 transitions, 480 flow [2024-06-21 15:59:13,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 451 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:13,557 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 347 flow [2024-06-21 15:59:13,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=347, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2024-06-21 15:59:13,557 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-21 15:59:13,557 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 347 flow [2024-06-21 15:59:13,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:13,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:13,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:13,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 15:59:13,558 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:13,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:13,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2133827118, now seen corresponding path program 2 times [2024-06-21 15:59:13,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:13,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830377853] [2024-06-21 15:59:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:13,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:13,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:13,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830377853] [2024-06-21 15:59:13,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830377853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:13,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:13,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:13,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350126974] [2024-06-21 15:59:13,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:13,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:13,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:13,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:13,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:13,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:13,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:13,711 INFO L124 PetriNetUnfolderBase]: 124/279 cut-off events. [2024-06-21 15:59:13,711 INFO L125 PetriNetUnfolderBase]: For 2535/2535 co-relation queries the response was YES. [2024-06-21 15:59:13,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 279 events. 124/279 cut-off events. For 2535/2535 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1197 event pairs, 20 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 1148. Up to 161 conditions per place. [2024-06-21 15:59:13,713 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 40 selfloop transitions, 25 changer transitions 0/72 dead transitions. [2024-06-21 15:59:13,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 629 flow [2024-06-21 15:59:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 15:59:13,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6359447004608295 [2024-06-21 15:59:13,714 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 347 flow. Second operand 7 states and 138 transitions. [2024-06-21 15:59:13,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 629 flow [2024-06-21 15:59:13,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 589 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:13,719 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 420 flow [2024-06-21 15:59:13,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-06-21 15:59:13,720 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-21 15:59:13,720 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 420 flow [2024-06-21 15:59:13,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:13,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:13,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:13,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 15:59:13,720 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:13,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:13,721 INFO L85 PathProgramCache]: Analyzing trace with hash 569025898, now seen corresponding path program 3 times [2024-06-21 15:59:13,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:13,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764376041] [2024-06-21 15:59:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:13,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:13,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:13,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764376041] [2024-06-21 15:59:13,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764376041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:13,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:13,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:13,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049637678] [2024-06-21 15:59:13,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:13,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:13,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:13,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:13,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:13,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:13,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 420 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:13,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:13,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:13,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:13,864 INFO L124 PetriNetUnfolderBase]: 122/276 cut-off events. [2024-06-21 15:59:13,864 INFO L125 PetriNetUnfolderBase]: For 2681/2681 co-relation queries the response was YES. [2024-06-21 15:59:13,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 276 events. 122/276 cut-off events. For 2681/2681 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1184 event pairs, 20 based on Foata normal form. 1/273 useless extension candidates. Maximal degree in co-relation 1149. Up to 159 conditions per place. [2024-06-21 15:59:13,865 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 38 selfloop transitions, 26 changer transitions 0/71 dead transitions. [2024-06-21 15:59:13,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 612 flow [2024-06-21 15:59:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 15:59:13,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6267281105990783 [2024-06-21 15:59:13,867 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 420 flow. Second operand 7 states and 136 transitions. [2024-06-21 15:59:13,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 612 flow [2024-06-21 15:59:13,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 71 transitions, 573 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 15:59:13,871 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 438 flow [2024-06-21 15:59:13,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=438, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2024-06-21 15:59:13,872 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2024-06-21 15:59:13,872 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 438 flow [2024-06-21 15:59:13,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:13,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:13,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:13,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 15:59:13,872 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:13,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:13,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1795108676, now seen corresponding path program 1 times [2024-06-21 15:59:13,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:13,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390274452] [2024-06-21 15:59:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:13,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:13,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:13,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390274452] [2024-06-21 15:59:13,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390274452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:13,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:13,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:13,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680321436] [2024-06-21 15:59:13,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:13,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:13,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:13,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:13,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:14,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:14,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:14,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:14,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:14,059 INFO L124 PetriNetUnfolderBase]: 126/284 cut-off events. [2024-06-21 15:59:14,059 INFO L125 PetriNetUnfolderBase]: For 3170/3170 co-relation queries the response was YES. [2024-06-21 15:59:14,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 284 events. 126/284 cut-off events. For 3170/3170 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1229 event pairs, 20 based on Foata normal form. 2/282 useless extension candidates. Maximal degree in co-relation 1218. Up to 196 conditions per place. [2024-06-21 15:59:14,061 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 48 selfloop transitions, 17 changer transitions 0/72 dead transitions. [2024-06-21 15:59:14,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 72 transitions, 602 flow [2024-06-21 15:59:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 15:59:14,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6082949308755761 [2024-06-21 15:59:14,062 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 438 flow. Second operand 7 states and 132 transitions. [2024-06-21 15:59:14,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 72 transitions, 602 flow [2024-06-21 15:59:14,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 545 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:14,069 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 427 flow [2024-06-21 15:59:14,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2024-06-21 15:59:14,070 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-06-21 15:59:14,070 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 427 flow [2024-06-21 15:59:14,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:14,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:14,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 15:59:14,071 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:14,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:14,071 INFO L85 PathProgramCache]: Analyzing trace with hash -528819396, now seen corresponding path program 4 times [2024-06-21 15:59:14,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:14,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074140496] [2024-06-21 15:59:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:14,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:14,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:14,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074140496] [2024-06-21 15:59:14,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074140496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:14,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:14,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:14,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049228770] [2024-06-21 15:59:14,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:14,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:14,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:14,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:14,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:14,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:14,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 427 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:14,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:14,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:14,240 INFO L124 PetriNetUnfolderBase]: 123/275 cut-off events. [2024-06-21 15:59:14,240 INFO L125 PetriNetUnfolderBase]: For 3009/3009 co-relation queries the response was YES. [2024-06-21 15:59:14,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 275 events. 123/275 cut-off events. For 3009/3009 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1204 event pairs, 25 based on Foata normal form. 2/271 useless extension candidates. Maximal degree in co-relation 1155. Up to 185 conditions per place. [2024-06-21 15:59:14,242 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 45 selfloop transitions, 17 changer transitions 0/69 dead transitions. [2024-06-21 15:59:14,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 69 transitions, 571 flow [2024-06-21 15:59:14,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 15:59:14,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944700460829493 [2024-06-21 15:59:14,243 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 427 flow. Second operand 7 states and 129 transitions. [2024-06-21 15:59:14,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 69 transitions, 571 flow [2024-06-21 15:59:14,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 69 transitions, 535 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:14,249 INFO L231 Difference]: Finished difference. Result has 82 places, 60 transitions, 429 flow [2024-06-21 15:59:14,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2024-06-21 15:59:14,250 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-21 15:59:14,250 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 429 flow [2024-06-21 15:59:14,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:14,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:14,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 15:59:14,251 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:14,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1831103964, now seen corresponding path program 4 times [2024-06-21 15:59:14,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:14,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978142173] [2024-06-21 15:59:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:14,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:14,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:14,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978142173] [2024-06-21 15:59:14,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978142173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:14,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:14,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:14,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165993362] [2024-06-21 15:59:14,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:14,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:14,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:14,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:14,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:14,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:14,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:14,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:14,400 INFO L124 PetriNetUnfolderBase]: 131/292 cut-off events. [2024-06-21 15:59:14,400 INFO L125 PetriNetUnfolderBase]: For 3350/3350 co-relation queries the response was YES. [2024-06-21 15:59:14,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 292 events. 131/292 cut-off events. For 3350/3350 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1306 event pairs, 25 based on Foata normal form. 1/287 useless extension candidates. Maximal degree in co-relation 1257. Up to 172 conditions per place. [2024-06-21 15:59:14,403 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 38 selfloop transitions, 29 changer transitions 0/74 dead transitions. [2024-06-21 15:59:14,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 74 transitions, 713 flow [2024-06-21 15:59:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:14,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 15:59:14,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6221198156682027 [2024-06-21 15:59:14,404 INFO L175 Difference]: Start difference. First operand has 82 places, 60 transitions, 429 flow. Second operand 7 states and 135 transitions. [2024-06-21 15:59:14,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 74 transitions, 713 flow [2024-06-21 15:59:14,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 74 transitions, 665 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:14,413 INFO L231 Difference]: Finished difference. Result has 83 places, 64 transitions, 488 flow [2024-06-21 15:59:14,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=488, PETRI_PLACES=83, PETRI_TRANSITIONS=64} [2024-06-21 15:59:14,413 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-06-21 15:59:14,413 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 64 transitions, 488 flow [2024-06-21 15:59:14,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:14,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:14,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 15:59:14,414 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:14,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:14,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1832110790, now seen corresponding path program 5 times [2024-06-21 15:59:14,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:14,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968118485] [2024-06-21 15:59:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:14,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:14,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:14,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968118485] [2024-06-21 15:59:14,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968118485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:14,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:14,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:14,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452080190] [2024-06-21 15:59:14,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:14,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:14,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:14,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:14,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:14,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:14,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 64 transitions, 488 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:14,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:14,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:14,564 INFO L124 PetriNetUnfolderBase]: 129/289 cut-off events. [2024-06-21 15:59:14,564 INFO L125 PetriNetUnfolderBase]: For 3394/3394 co-relation queries the response was YES. [2024-06-21 15:59:14,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 289 events. 129/289 cut-off events. For 3394/3394 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1291 event pairs, 25 based on Foata normal form. 1/284 useless extension candidates. Maximal degree in co-relation 1228. Up to 170 conditions per place. [2024-06-21 15:59:14,567 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 36 selfloop transitions, 30 changer transitions 0/73 dead transitions. [2024-06-21 15:59:14,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 73 transitions, 684 flow [2024-06-21 15:59:14,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 15:59:14,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6129032258064516 [2024-06-21 15:59:14,568 INFO L175 Difference]: Start difference. First operand has 83 places, 64 transitions, 488 flow. Second operand 7 states and 133 transitions. [2024-06-21 15:59:14,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 73 transitions, 684 flow [2024-06-21 15:59:14,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 591 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:14,587 INFO L231 Difference]: Finished difference. Result has 85 places, 64 transitions, 460 flow [2024-06-21 15:59:14,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=460, PETRI_PLACES=85, PETRI_TRANSITIONS=64} [2024-06-21 15:59:14,587 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2024-06-21 15:59:14,587 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 64 transitions, 460 flow [2024-06-21 15:59:14,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:14,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:14,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 15:59:14,588 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:14,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:14,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2116203834, now seen corresponding path program 6 times [2024-06-21 15:59:14,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:14,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836880277] [2024-06-21 15:59:14,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:14,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:14,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:14,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836880277] [2024-06-21 15:59:14,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836880277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:14,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:14,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:14,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467879366] [2024-06-21 15:59:14,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:14,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:14,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:14,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:14,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:14,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:14,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 64 transitions, 460 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:14,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:14,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:14,752 INFO L124 PetriNetUnfolderBase]: 127/292 cut-off events. [2024-06-21 15:59:14,753 INFO L125 PetriNetUnfolderBase]: For 3237/3237 co-relation queries the response was YES. [2024-06-21 15:59:14,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 292 events. 127/292 cut-off events. For 3237/3237 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1290 event pairs, 17 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 1159. Up to 222 conditions per place. [2024-06-21 15:59:14,754 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 54 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-21 15:59:14,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 72 transitions, 608 flow [2024-06-21 15:59:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 15:59:14,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576036866359447 [2024-06-21 15:59:14,756 INFO L175 Difference]: Start difference. First operand has 85 places, 64 transitions, 460 flow. Second operand 7 states and 125 transitions. [2024-06-21 15:59:14,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 72 transitions, 608 flow [2024-06-21 15:59:14,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 72 transitions, 540 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:14,762 INFO L231 Difference]: Finished difference. Result has 87 places, 64 transitions, 419 flow [2024-06-21 15:59:14,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=419, PETRI_PLACES=87, PETRI_TRANSITIONS=64} [2024-06-21 15:59:14,763 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-21 15:59:14,763 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 64 transitions, 419 flow [2024-06-21 15:59:14,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:14,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:14,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 15:59:14,763 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:14,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash -995904452, now seen corresponding path program 2 times [2024-06-21 15:59:14,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:14,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094885408] [2024-06-21 15:59:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:14,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:14,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:14,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094885408] [2024-06-21 15:59:14,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094885408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:14,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:14,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:14,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337317026] [2024-06-21 15:59:14,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:14,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:14,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:14,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:14,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:14,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:14,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 64 transitions, 419 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:14,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:14,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:14,923 INFO L124 PetriNetUnfolderBase]: 131/297 cut-off events. [2024-06-21 15:59:14,923 INFO L125 PetriNetUnfolderBase]: For 3710/3710 co-relation queries the response was YES. [2024-06-21 15:59:14,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 297 events. 131/297 cut-off events. For 3710/3710 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1317 event pairs, 21 based on Foata normal form. 2/295 useless extension candidates. Maximal degree in co-relation 1146. Up to 206 conditions per place. [2024-06-21 15:59:14,925 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 50 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-06-21 15:59:14,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 74 transitions, 579 flow [2024-06-21 15:59:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 15:59:14,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944700460829493 [2024-06-21 15:59:14,926 INFO L175 Difference]: Start difference. First operand has 87 places, 64 transitions, 419 flow. Second operand 7 states and 129 transitions. [2024-06-21 15:59:14,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 74 transitions, 579 flow [2024-06-21 15:59:14,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 74 transitions, 530 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 15:59:14,934 INFO L231 Difference]: Finished difference. Result has 86 places, 65 transitions, 416 flow [2024-06-21 15:59:14,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2024-06-21 15:59:14,935 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2024-06-21 15:59:14,935 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 416 flow [2024-06-21 15:59:14,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:14,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:14,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 15:59:14,935 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:14,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:14,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2126332092, now seen corresponding path program 3 times [2024-06-21 15:59:14,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:14,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032753007] [2024-06-21 15:59:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:14,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:15,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:15,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032753007] [2024-06-21 15:59:15,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032753007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:15,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:15,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:15,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512013876] [2024-06-21 15:59:15,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:15,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:15,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:15,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:15,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:15,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:15,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:15,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:15,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:15,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:15,122 INFO L124 PetriNetUnfolderBase]: 135/312 cut-off events. [2024-06-21 15:59:15,122 INFO L125 PetriNetUnfolderBase]: For 3995/3995 co-relation queries the response was YES. [2024-06-21 15:59:15,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 312 events. 135/312 cut-off events. For 3995/3995 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1411 event pairs, 19 based on Foata normal form. 2/312 useless extension candidates. Maximal degree in co-relation 1182. Up to 235 conditions per place. [2024-06-21 15:59:15,123 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 58 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-21 15:59:15,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 75 transitions, 580 flow [2024-06-21 15:59:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 15:59:15,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576036866359447 [2024-06-21 15:59:15,125 INFO L175 Difference]: Start difference. First operand has 86 places, 65 transitions, 416 flow. Second operand 7 states and 125 transitions. [2024-06-21 15:59:15,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 75 transitions, 580 flow [2024-06-21 15:59:15,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 75 transitions, 544 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:15,132 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 414 flow [2024-06-21 15:59:15,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2024-06-21 15:59:15,132 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2024-06-21 15:59:15,132 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 414 flow [2024-06-21 15:59:15,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:15,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:15,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:15,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 15:59:15,133 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:15,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:15,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2126688282, now seen corresponding path program 4 times [2024-06-21 15:59:15,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:15,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924138056] [2024-06-21 15:59:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:15,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:15,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:15,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924138056] [2024-06-21 15:59:15,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924138056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:15,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:15,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:15,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498231684] [2024-06-21 15:59:15,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:15,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:15,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:15,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:15,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 414 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:15,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:15,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:15,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:15,321 INFO L124 PetriNetUnfolderBase]: 132/307 cut-off events. [2024-06-21 15:59:15,321 INFO L125 PetriNetUnfolderBase]: For 3612/3612 co-relation queries the response was YES. [2024-06-21 15:59:15,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 307 events. 132/307 cut-off events. For 3612/3612 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1387 event pairs, 16 based on Foata normal form. 2/307 useless extension candidates. Maximal degree in co-relation 1112. Up to 216 conditions per place. [2024-06-21 15:59:15,323 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 58 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-21 15:59:15,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 77 transitions, 578 flow [2024-06-21 15:59:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 15:59:15,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685483870967742 [2024-06-21 15:59:15,324 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 414 flow. Second operand 8 states and 141 transitions. [2024-06-21 15:59:15,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 77 transitions, 578 flow [2024-06-21 15:59:15,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 77 transitions, 554 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:15,334 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 418 flow [2024-06-21 15:59:15,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2024-06-21 15:59:15,335 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-06-21 15:59:15,335 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 418 flow [2024-06-21 15:59:15,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:15,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:15,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:15,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 15:59:15,335 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:15,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1246387495, now seen corresponding path program 1 times [2024-06-21 15:59:15,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:15,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296193502] [2024-06-21 15:59:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:15,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:15,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296193502] [2024-06-21 15:59:15,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296193502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:15,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:15,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:15,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044342371] [2024-06-21 15:59:15,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:15,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:15,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:15,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:15,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 418 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:15,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:15,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:15,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:15,591 INFO L124 PetriNetUnfolderBase]: 162/377 cut-off events. [2024-06-21 15:59:15,592 INFO L125 PetriNetUnfolderBase]: For 8267/8267 co-relation queries the response was YES. [2024-06-21 15:59:15,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1579 conditions, 377 events. 162/377 cut-off events. For 8267/8267 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1824 event pairs, 28 based on Foata normal form. 6/381 useless extension candidates. Maximal degree in co-relation 1538. Up to 177 conditions per place. [2024-06-21 15:59:15,594 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 63 selfloop transitions, 9 changer transitions 12/91 dead transitions. [2024-06-21 15:59:15,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 91 transitions, 720 flow [2024-06-21 15:59:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:59:15,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:59:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 15:59:15,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057347670250897 [2024-06-21 15:59:15,595 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 418 flow. Second operand 9 states and 169 transitions. [2024-06-21 15:59:15,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 91 transitions, 720 flow [2024-06-21 15:59:15,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 91 transitions, 690 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:15,607 INFO L231 Difference]: Finished difference. Result has 94 places, 63 transitions, 391 flow [2024-06-21 15:59:15,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=391, PETRI_PLACES=94, PETRI_TRANSITIONS=63} [2024-06-21 15:59:15,608 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-06-21 15:59:15,608 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 63 transitions, 391 flow [2024-06-21 15:59:15,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:15,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:15,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:15,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 15:59:15,609 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:15,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1478879681, now seen corresponding path program 2 times [2024-06-21 15:59:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:15,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731983555] [2024-06-21 15:59:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:15,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:15,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731983555] [2024-06-21 15:59:15,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731983555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:15,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:15,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:15,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280624786] [2024-06-21 15:59:15,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:15,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:15,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:15,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:15,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:15,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:15,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 63 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:15,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:15,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:15,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:15,827 INFO L124 PetriNetUnfolderBase]: 146/339 cut-off events. [2024-06-21 15:59:15,828 INFO L125 PetriNetUnfolderBase]: For 8785/8785 co-relation queries the response was YES. [2024-06-21 15:59:15,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1476 conditions, 339 events. 146/339 cut-off events. For 8785/8785 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1583 event pairs, 26 based on Foata normal form. 6/343 useless extension candidates. Maximal degree in co-relation 1434. Up to 177 conditions per place. [2024-06-21 15:59:15,830 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 62 selfloop transitions, 8 changer transitions 6/83 dead transitions. [2024-06-21 15:59:15,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 83 transitions, 667 flow [2024-06-21 15:59:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:15,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 15:59:15,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5967741935483871 [2024-06-21 15:59:15,831 INFO L175 Difference]: Start difference. First operand has 94 places, 63 transitions, 391 flow. Second operand 8 states and 148 transitions. [2024-06-21 15:59:15,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 83 transitions, 667 flow [2024-06-21 15:59:15,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 83 transitions, 623 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 15:59:15,843 INFO L231 Difference]: Finished difference. Result has 89 places, 61 transitions, 363 flow [2024-06-21 15:59:15,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=89, PETRI_TRANSITIONS=61} [2024-06-21 15:59:15,843 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-06-21 15:59:15,844 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 61 transitions, 363 flow [2024-06-21 15:59:15,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:15,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:15,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:15,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 15:59:15,844 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:15,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:15,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1503912665, now seen corresponding path program 3 times [2024-06-21 15:59:15,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:15,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418407756] [2024-06-21 15:59:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:15,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:15,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:15,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418407756] [2024-06-21 15:59:15,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418407756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:15,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:15,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:15,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139694280] [2024-06-21 15:59:15,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:15,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:15,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:15,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:15,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:15,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 61 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:15,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:15,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:15,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:16,064 INFO L124 PetriNetUnfolderBase]: 122/287 cut-off events. [2024-06-21 15:59:16,065 INFO L125 PetriNetUnfolderBase]: For 5628/5628 co-relation queries the response was YES. [2024-06-21 15:59:16,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 287 events. 122/287 cut-off events. For 5628/5628 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1283 event pairs, 18 based on Foata normal form. 8/293 useless extension candidates. Maximal degree in co-relation 1021. Up to 177 conditions per place. [2024-06-21 15:59:16,066 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 50 selfloop transitions, 4 changer transitions 16/77 dead transitions. [2024-06-21 15:59:16,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 77 transitions, 553 flow [2024-06-21 15:59:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 15:59:16,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5766129032258065 [2024-06-21 15:59:16,068 INFO L175 Difference]: Start difference. First operand has 89 places, 61 transitions, 363 flow. Second operand 8 states and 143 transitions. [2024-06-21 15:59:16,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 77 transitions, 553 flow [2024-06-21 15:59:16,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 535 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:16,076 INFO L231 Difference]: Finished difference. Result has 88 places, 56 transitions, 325 flow [2024-06-21 15:59:16,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=88, PETRI_TRANSITIONS=56} [2024-06-21 15:59:16,076 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2024-06-21 15:59:16,076 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 56 transitions, 325 flow [2024-06-21 15:59:16,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:16,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:16,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 15:59:16,077 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:16,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:16,077 INFO L85 PathProgramCache]: Analyzing trace with hash -642424069, now seen corresponding path program 4 times [2024-06-21 15:59:16,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:16,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777786328] [2024-06-21 15:59:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:16,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:16,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:16,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777786328] [2024-06-21 15:59:16,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777786328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:16,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:16,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:16,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007413519] [2024-06-21 15:59:16,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:16,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:16,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:16,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:16,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 56 transitions, 325 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:16,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:16,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:16,248 INFO L124 PetriNetUnfolderBase]: 112/259 cut-off events. [2024-06-21 15:59:16,248 INFO L125 PetriNetUnfolderBase]: For 5260/5260 co-relation queries the response was YES. [2024-06-21 15:59:16,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 259 events. 112/259 cut-off events. For 5260/5260 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1127 event pairs, 22 based on Foata normal form. 8/263 useless extension candidates. Maximal degree in co-relation 928. Up to 131 conditions per place. [2024-06-21 15:59:16,250 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 32 selfloop transitions, 21 changer transitions 9/69 dead transitions. [2024-06-21 15:59:16,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 69 transitions, 491 flow [2024-06-21 15:59:16,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 15:59:16,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6008064516129032 [2024-06-21 15:59:16,251 INFO L175 Difference]: Start difference. First operand has 88 places, 56 transitions, 325 flow. Second operand 8 states and 149 transitions. [2024-06-21 15:59:16,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 69 transitions, 491 flow [2024-06-21 15:59:16,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 69 transitions, 475 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:16,256 INFO L231 Difference]: Finished difference. Result has 82 places, 53 transitions, 339 flow [2024-06-21 15:59:16,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=339, PETRI_PLACES=82, PETRI_TRANSITIONS=53} [2024-06-21 15:59:16,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-21 15:59:16,256 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 53 transitions, 339 flow [2024-06-21 15:59:16,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:16,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:16,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 15:59:16,257 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:16,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:16,257 INFO L85 PathProgramCache]: Analyzing trace with hash 894817531, now seen corresponding path program 5 times [2024-06-21 15:59:16,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:16,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657866741] [2024-06-21 15:59:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:16,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:16,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:16,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657866741] [2024-06-21 15:59:16,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657866741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:16,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:16,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:16,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828274481] [2024-06-21 15:59:16,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:16,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:16,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:16,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:16,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:16,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:16,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 53 transitions, 339 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:16,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:16,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:16,429 INFO L124 PetriNetUnfolderBase]: 125/294 cut-off events. [2024-06-21 15:59:16,429 INFO L125 PetriNetUnfolderBase]: For 6464/6464 co-relation queries the response was YES. [2024-06-21 15:59:16,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 294 events. 125/294 cut-off events. For 6464/6464 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1328 event pairs, 30 based on Foata normal form. 6/296 useless extension candidates. Maximal degree in co-relation 1214. Up to 117 conditions per place. [2024-06-21 15:59:16,432 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 37 selfloop transitions, 19 changer transitions 7/70 dead transitions. [2024-06-21 15:59:16,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 70 transitions, 567 flow [2024-06-21 15:59:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 15:59:16,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6088709677419355 [2024-06-21 15:59:16,433 INFO L175 Difference]: Start difference. First operand has 82 places, 53 transitions, 339 flow. Second operand 8 states and 151 transitions. [2024-06-21 15:59:16,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 70 transitions, 567 flow [2024-06-21 15:59:16,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 70 transitions, 517 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:16,439 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 316 flow [2024-06-21 15:59:16,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=316, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2024-06-21 15:59:16,440 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-06-21 15:59:16,440 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 316 flow [2024-06-21 15:59:16,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:16,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:16,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 15:59:16,441 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:16,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:16,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1280401637, now seen corresponding path program 1 times [2024-06-21 15:59:16,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:16,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229806996] [2024-06-21 15:59:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:16,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:16,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:16,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229806996] [2024-06-21 15:59:16,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229806996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:16,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:16,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:16,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648703776] [2024-06-21 15:59:16,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:16,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:16,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:16,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:16,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:16,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:16,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 316 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:16,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:16,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:16,612 INFO L124 PetriNetUnfolderBase]: 100/237 cut-off events. [2024-06-21 15:59:16,612 INFO L125 PetriNetUnfolderBase]: For 4391/4391 co-relation queries the response was YES. [2024-06-21 15:59:16,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 237 events. 100/237 cut-off events. For 4391/4391 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 986 event pairs, 22 based on Foata normal form. 8/241 useless extension candidates. Maximal degree in co-relation 864. Up to 117 conditions per place. [2024-06-21 15:59:16,614 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 30 selfloop transitions, 17 changer transitions 9/63 dead transitions. [2024-06-21 15:59:16,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 63 transitions, 468 flow [2024-06-21 15:59:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 15:59:16,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5887096774193549 [2024-06-21 15:59:16,615 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 316 flow. Second operand 8 states and 146 transitions. [2024-06-21 15:59:16,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 63 transitions, 468 flow [2024-06-21 15:59:16,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 63 transitions, 426 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 15:59:16,620 INFO L231 Difference]: Finished difference. Result has 77 places, 47 transitions, 292 flow [2024-06-21 15:59:16,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=77, PETRI_TRANSITIONS=47} [2024-06-21 15:59:16,620 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-21 15:59:16,620 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 47 transitions, 292 flow [2024-06-21 15:59:16,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:16,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:16,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 15:59:16,621 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:16,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:16,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1280104967, now seen corresponding path program 2 times [2024-06-21 15:59:16,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:16,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799192129] [2024-06-21 15:59:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:16,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:16,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:16,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799192129] [2024-06-21 15:59:16,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799192129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:16,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:16,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:16,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260959544] [2024-06-21 15:59:16,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:16,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:16,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:16,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:16,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:16,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 47 transitions, 292 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:16,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:16,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:16,795 INFO L124 PetriNetUnfolderBase]: 91/220 cut-off events. [2024-06-21 15:59:16,795 INFO L125 PetriNetUnfolderBase]: For 3232/3232 co-relation queries the response was YES. [2024-06-21 15:59:16,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 220 events. 91/220 cut-off events. For 3232/3232 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 886 event pairs, 16 based on Foata normal form. 6/222 useless extension candidates. Maximal degree in co-relation 788. Up to 107 conditions per place. [2024-06-21 15:59:16,796 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 24 selfloop transitions, 13 changer transitions 16/60 dead transitions. [2024-06-21 15:59:16,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 60 transitions, 432 flow [2024-06-21 15:59:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:16,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 15:59:16,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-21 15:59:16,798 INFO L175 Difference]: Start difference. First operand has 77 places, 47 transitions, 292 flow. Second operand 8 states and 144 transitions. [2024-06-21 15:59:16,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 60 transitions, 432 flow [2024-06-21 15:59:16,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 60 transitions, 394 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:16,803 INFO L231 Difference]: Finished difference. Result has 74 places, 42 transitions, 253 flow [2024-06-21 15:59:16,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=253, PETRI_PLACES=74, PETRI_TRANSITIONS=42} [2024-06-21 15:59:16,803 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-21 15:59:16,804 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 42 transitions, 253 flow [2024-06-21 15:59:16,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:16,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:16,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 15:59:16,804 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:16,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:16,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1212005507, now seen corresponding path program 3 times [2024-06-21 15:59:16,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:16,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360165156] [2024-06-21 15:59:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:16,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:16,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:16,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360165156] [2024-06-21 15:59:16,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360165156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:16,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:16,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:16,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164868536] [2024-06-21 15:59:16,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:16,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:16,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:16,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:16,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:16,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:16,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 42 transitions, 253 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:16,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:16,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:16,959 INFO L124 PetriNetUnfolderBase]: 83/196 cut-off events. [2024-06-21 15:59:16,960 INFO L125 PetriNetUnfolderBase]: For 3304/3304 co-relation queries the response was YES. [2024-06-21 15:59:16,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 196 events. 83/196 cut-off events. For 3304/3304 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 758 event pairs, 20 based on Foata normal form. 8/203 useless extension candidates. Maximal degree in co-relation 710. Up to 103 conditions per place. [2024-06-21 15:59:16,961 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 22 selfloop transitions, 14 changer transitions 9/52 dead transitions. [2024-06-21 15:59:16,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 52 transitions, 375 flow [2024-06-21 15:59:16,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 15:59:16,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725806451612904 [2024-06-21 15:59:16,962 INFO L175 Difference]: Start difference. First operand has 74 places, 42 transitions, 253 flow. Second operand 8 states and 142 transitions. [2024-06-21 15:59:16,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 52 transitions, 375 flow [2024-06-21 15:59:16,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 52 transitions, 333 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 15:59:16,965 INFO L231 Difference]: Finished difference. Result has 65 places, 39 transitions, 227 flow [2024-06-21 15:59:16,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=227, PETRI_PLACES=65, PETRI_TRANSITIONS=39} [2024-06-21 15:59:16,965 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-21 15:59:16,965 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 39 transitions, 227 flow [2024-06-21 15:59:16,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:16,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:16,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 15:59:16,966 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:16,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1896948231, now seen corresponding path program 4 times [2024-06-21 15:59:16,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:16,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140742905] [2024-06-21 15:59:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:16,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:17,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:17,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140742905] [2024-06-21 15:59:17,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140742905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:17,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:17,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:17,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420535603] [2024-06-21 15:59:17,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:17,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:17,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:17,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:17,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:17,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 39 transitions, 227 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:17,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:17,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:17,135 INFO L124 PetriNetUnfolderBase]: 96/231 cut-off events. [2024-06-21 15:59:17,135 INFO L125 PetriNetUnfolderBase]: For 2974/2974 co-relation queries the response was YES. [2024-06-21 15:59:17,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 231 events. 96/231 cut-off events. For 2974/2974 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 977 event pairs, 30 based on Foata normal form. 6/236 useless extension candidates. Maximal degree in co-relation 870. Up to 89 conditions per place. [2024-06-21 15:59:17,136 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 27 selfloop transitions, 12 changer transitions 7/53 dead transitions. [2024-06-21 15:59:17,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 53 transitions, 393 flow [2024-06-21 15:59:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:17,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 15:59:17,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-21 15:59:17,137 INFO L175 Difference]: Start difference. First operand has 65 places, 39 transitions, 227 flow. Second operand 8 states and 144 transitions. [2024-06-21 15:59:17,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 53 transitions, 393 flow [2024-06-21 15:59:17,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 357 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:17,141 INFO L231 Difference]: Finished difference. Result has 63 places, 36 transitions, 204 flow [2024-06-21 15:59:17,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=204, PETRI_PLACES=63, PETRI_TRANSITIONS=36} [2024-06-21 15:59:17,141 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-21 15:59:17,141 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 36 transitions, 204 flow [2024-06-21 15:59:17,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:17,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:17,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 15:59:17,142 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:17,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:17,142 INFO L85 PathProgramCache]: Analyzing trace with hash 278158841, now seen corresponding path program 5 times [2024-06-21 15:59:17,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:17,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025191235] [2024-06-21 15:59:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:17,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:17,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:17,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025191235] [2024-06-21 15:59:17,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025191235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:17,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:17,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:17,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418164799] [2024-06-21 15:59:17,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:17,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:17,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:17,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:17,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:17,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:17,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 36 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:17,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:17,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:17,306 INFO L124 PetriNetUnfolderBase]: 71/174 cut-off events. [2024-06-21 15:59:17,306 INFO L125 PetriNetUnfolderBase]: For 1943/1943 co-relation queries the response was YES. [2024-06-21 15:59:17,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 174 events. 71/174 cut-off events. For 1943/1943 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 658 event pairs, 22 based on Foata normal form. 8/181 useless extension candidates. Maximal degree in co-relation 590. Up to 89 conditions per place. [2024-06-21 15:59:17,307 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 19 selfloop transitions, 11 changer transitions 9/46 dead transitions. [2024-06-21 15:59:17,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 46 transitions, 312 flow [2024-06-21 15:59:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 15:59:17,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-06-21 15:59:17,308 INFO L175 Difference]: Start difference. First operand has 63 places, 36 transitions, 204 flow. Second operand 8 states and 140 transitions. [2024-06-21 15:59:17,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 46 transitions, 312 flow [2024-06-21 15:59:17,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 46 transitions, 284 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 15:59:17,311 INFO L231 Difference]: Finished difference. Result has 60 places, 33 transitions, 182 flow [2024-06-21 15:59:17,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=182, PETRI_PLACES=60, PETRI_TRANSITIONS=33} [2024-06-21 15:59:17,311 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2024-06-21 15:59:17,311 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 33 transitions, 182 flow [2024-06-21 15:59:17,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:17,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:17,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 15:59:17,312 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:17,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:17,312 INFO L85 PathProgramCache]: Analyzing trace with hash 273390297, now seen corresponding path program 6 times [2024-06-21 15:59:17,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:17,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958326937] [2024-06-21 15:59:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:17,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:17,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:17,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958326937] [2024-06-21 15:59:17,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958326937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:17,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:17,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:17,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920076711] [2024-06-21 15:59:17,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:17,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:17,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:17,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:17,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:17,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:17,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 33 transitions, 182 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:17,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:17,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:17,500 INFO L124 PetriNetUnfolderBase]: 77/192 cut-off events. [2024-06-21 15:59:17,500 INFO L125 PetriNetUnfolderBase]: For 1796/1796 co-relation queries the response was YES. [2024-06-21 15:59:17,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 192 events. 77/192 cut-off events. For 1796/1796 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 731 event pairs, 27 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 678. Up to 62 conditions per place. [2024-06-21 15:59:17,501 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 23 selfloop transitions, 8 changer transitions 8/46 dead transitions. [2024-06-21 15:59:17,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 46 transitions, 322 flow [2024-06-21 15:59:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 15:59:17,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-06-21 15:59:17,502 INFO L175 Difference]: Start difference. First operand has 60 places, 33 transitions, 182 flow. Second operand 8 states and 140 transitions. [2024-06-21 15:59:17,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 46 transitions, 322 flow [2024-06-21 15:59:17,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 46 transitions, 292 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:17,504 INFO L231 Difference]: Finished difference. Result has 57 places, 29 transitions, 151 flow [2024-06-21 15:59:17,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=151, PETRI_PLACES=57, PETRI_TRANSITIONS=29} [2024-06-21 15:59:17,505 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2024-06-21 15:59:17,505 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 29 transitions, 151 flow [2024-06-21 15:59:17,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:17,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:17,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 15:59:17,506 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:17,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash -999264741, now seen corresponding path program 6 times [2024-06-21 15:59:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:17,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948797323] [2024-06-21 15:59:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:17,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:17,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:17,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948797323] [2024-06-21 15:59:17,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948797323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:17,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:17,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:17,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011280047] [2024-06-21 15:59:17,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:17,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:17,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:17,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:17,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:17,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:17,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 29 transitions, 151 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:17,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:17,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:17,692 INFO L124 PetriNetUnfolderBase]: 69/172 cut-off events. [2024-06-21 15:59:17,692 INFO L125 PetriNetUnfolderBase]: For 1532/1532 co-relation queries the response was YES. [2024-06-21 15:59:17,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 172 events. 69/172 cut-off events. For 1532/1532 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 634 event pairs, 27 based on Foata normal form. 6/177 useless extension candidates. Maximal degree in co-relation 600. Up to 56 conditions per place. [2024-06-21 15:59:17,693 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 22 selfloop transitions, 7 changer transitions 6/42 dead transitions. [2024-06-21 15:59:17,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 42 transitions, 279 flow [2024-06-21 15:59:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:17,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 15:59:17,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604838709677419 [2024-06-21 15:59:17,694 INFO L175 Difference]: Start difference. First operand has 57 places, 29 transitions, 151 flow. Second operand 8 states and 139 transitions. [2024-06-21 15:59:17,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 42 transitions, 279 flow [2024-06-21 15:59:17,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 247 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 15:59:17,696 INFO L231 Difference]: Finished difference. Result has 51 places, 27 transitions, 132 flow [2024-06-21 15:59:17,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=132, PETRI_PLACES=51, PETRI_TRANSITIONS=27} [2024-06-21 15:59:17,697 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2024-06-21 15:59:17,697 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 27 transitions, 132 flow [2024-06-21 15:59:17,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:17,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:17,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 15:59:17,698 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:17,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:17,698 INFO L85 PathProgramCache]: Analyzing trace with hash -999561411, now seen corresponding path program 7 times [2024-06-21 15:59:17,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:17,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820037772] [2024-06-21 15:59:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:17,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:17,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:17,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820037772] [2024-06-21 15:59:17,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820037772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:17,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:17,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:17,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193302557] [2024-06-21 15:59:17,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:17,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:17,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:17,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:17,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:17,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:17,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 27 transitions, 132 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:17,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:17,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:17,893 INFO L124 PetriNetUnfolderBase]: 45/120 cut-off events. [2024-06-21 15:59:17,893 INFO L125 PetriNetUnfolderBase]: For 646/646 co-relation queries the response was YES. [2024-06-21 15:59:17,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 120 events. 45/120 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 358 event pairs, 19 based on Foata normal form. 8/127 useless extension candidates. Maximal degree in co-relation 358. Up to 52 conditions per place. [2024-06-21 15:59:17,894 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 14 selfloop transitions, 4 changer transitions 11/36 dead transitions. [2024-06-21 15:59:17,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 36 transitions, 212 flow [2024-06-21 15:59:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 15:59:17,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-06-21 15:59:17,895 INFO L175 Difference]: Start difference. First operand has 51 places, 27 transitions, 132 flow. Second operand 8 states and 134 transitions. [2024-06-21 15:59:17,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 36 transitions, 212 flow [2024-06-21 15:59:17,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 36 transitions, 194 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:17,896 INFO L231 Difference]: Finished difference. Result has 50 places, 22 transitions, 92 flow [2024-06-21 15:59:17,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=92, PETRI_PLACES=50, PETRI_TRANSITIONS=22} [2024-06-21 15:59:17,896 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2024-06-21 15:59:17,897 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 22 transitions, 92 flow [2024-06-21 15:59:17,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:17,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:17,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 15:59:17,897 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 15:59:17,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:17,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1388326913, now seen corresponding path program 8 times [2024-06-21 15:59:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:17,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113503738] [2024-06-21 15:59:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:17,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:17,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:17,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113503738] [2024-06-21 15:59:17,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113503738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:17,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:17,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:17,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926607040] [2024-06-21 15:59:17,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:17,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:17,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:18,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-21 15:59:18,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 22 transitions, 92 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:18,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:18,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-21 15:59:18,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:18,057 INFO L124 PetriNetUnfolderBase]: 20/65 cut-off events. [2024-06-21 15:59:18,057 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-06-21 15:59:18,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 65 events. 20/65 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 105 event pairs, 0 based on Foata normal form. 6/70 useless extension candidates. Maximal degree in co-relation 156. Up to 24 conditions per place. [2024-06-21 15:59:18,058 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2024-06-21 15:59:18,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 28 transitions, 130 flow [2024-06-21 15:59:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 15:59:18,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080645161290323 [2024-06-21 15:59:18,061 INFO L175 Difference]: Start difference. First operand has 50 places, 22 transitions, 92 flow. Second operand 8 states and 126 transitions. [2024-06-21 15:59:18,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 28 transitions, 130 flow [2024-06-21 15:59:18,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 28 transitions, 104 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 15:59:18,062 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2024-06-21 15:59:18,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2024-06-21 15:59:18,062 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-21 15:59:18,062 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2024-06-21 15:59:18,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:18,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 15:59:18,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 15:59:18,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 15:59:18,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 15:59:18,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 15:59:18,068 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 6, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2024-06-21 15:59:18,070 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 15:59:18,070 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 15:59:18,073 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 15:59:18,073 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 15:59:18,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 03:59:18 BasicIcfg [2024-06-21 15:59:18,074 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 15:59:18,074 INFO L158 Benchmark]: Toolchain (without parser) took 8908.72ms. Allocated memory was 182.5MB in the beginning and 299.9MB in the end (delta: 117.4MB). Free memory was 107.0MB in the beginning and 111.9MB in the end (delta: -4.9MB). Peak memory consumption was 114.3MB. Max. memory is 16.1GB. [2024-06-21 15:59:18,074 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 182.5MB. Free memory is still 139.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 15:59:18,075 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 182.5MB. Free memory was 154.7MB in the beginning and 154.5MB in the end (delta: 188.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 15:59:18,075 INFO L158 Benchmark]: CACSL2BoogieTranslator took 519.29ms. Allocated memory is still 182.5MB. Free memory was 106.8MB in the beginning and 134.7MB in the end (delta: -27.9MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2024-06-21 15:59:18,075 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.93ms. Allocated memory is still 182.5MB. Free memory was 134.7MB in the beginning and 132.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 15:59:18,075 INFO L158 Benchmark]: Boogie Preprocessor took 30.57ms. Allocated memory is still 182.5MB. Free memory was 132.6MB in the beginning and 130.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 15:59:18,075 INFO L158 Benchmark]: RCFGBuilder took 309.39ms. Allocated memory is still 182.5MB. Free memory was 130.5MB in the beginning and 109.8MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-21 15:59:18,076 INFO L158 Benchmark]: TraceAbstraction took 8015.70ms. Allocated memory was 182.5MB in the beginning and 299.9MB in the end (delta: 117.4MB). Free memory was 109.5MB in the beginning and 111.9MB in the end (delta: -2.4MB). Peak memory consumption was 118.2MB. Max. memory is 16.1GB. [2024-06-21 15:59:18,079 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 182.5MB. Free memory is still 139.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.11ms. Allocated memory is still 182.5MB. Free memory was 154.7MB in the beginning and 154.5MB in the end (delta: 188.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 519.29ms. Allocated memory is still 182.5MB. Free memory was 106.8MB in the beginning and 134.7MB in the end (delta: -27.9MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.93ms. Allocated memory is still 182.5MB. Free memory was 134.7MB in the beginning and 132.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.57ms. Allocated memory is still 182.5MB. Free memory was 132.6MB in the beginning and 130.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 309.39ms. Allocated memory is still 182.5MB. Free memory was 130.5MB in the beginning and 109.8MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 8015.70ms. Allocated memory was 182.5MB in the beginning and 299.9MB in the end (delta: 117.4MB). Free memory was 109.5MB in the beginning and 111.9MB in the end (delta: -2.4MB). Peak memory consumption was 118.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 767]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 768]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.9s, OverallIterations: 41, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1703 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1241 mSDsluCounter, 369 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 231 mSDsCounter, 193 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5711 IncrementalHoareTripleChecker+Invalid, 5904 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 193 mSolverCounterUnsat, 138 mSDtfsCounter, 5711 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=488occurred in iteration=22, InterpolantAutomatonStates: 282, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 631 NumberOfCodeBlocks, 631 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 590 ConstructedInterpolants, 0 QuantifiedInterpolants, 5533 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 41 InterpolantComputations, 41 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 15:59:18,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE