./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.2024-05-21_14-57-05.files/protection/safe036.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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.2024-05-21_14-57-05.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-bcb38a6-m [2024-06-03 18:56:24,647 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 18:56:24,715 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 18:56:24,720 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 18:56:24,721 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 18:56:24,746 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 18:56:24,747 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 18:56:24,747 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 18:56:24,748 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 18:56:24,751 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 18:56:24,751 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 18:56:24,752 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 18:56:24,752 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 18:56:24,753 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 18:56:24,754 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 18:56:24,754 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 18:56:24,754 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 18:56:24,754 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 18:56:24,755 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 18:56:24,755 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 18:56:24,755 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 18:56:24,755 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 18:56:24,756 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 18:56:24,756 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 18:56:24,756 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 18:56:24,756 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 18:56:24,756 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 18:56:24,757 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 18:56:24,757 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 18:56:24,757 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 18:56:24,758 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 18:56:24,758 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 18:56:24,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:56:24,759 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 18:56:24,759 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 18:56:24,759 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 18:56:24,759 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 18:56:24,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 18:56:24,760 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 18:56:24,760 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 18:56:24,760 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 18:56:24,760 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 18:56:24,760 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 18:56:24,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 18:56:24,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 18:56:24,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 18:56:24,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 18:56:24,988 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 18:56:24,988 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 18:56:24,989 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-03 18:56:26,065 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 18:56:26,288 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 18:56:26,292 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-03 18:56:26,303 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d490001ba/dc0acaa2eb764aa6915c425c80d54e3a/FLAG7f6a14085 [2024-06-03 18:56:26,317 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d490001ba/dc0acaa2eb764aa6915c425c80d54e3a [2024-06-03 18:56:26,322 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 18:56:26,322 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 18:56:26,323 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe036.yml/witness.yml [2024-06-03 18:56:26,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 18:56:26,431 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 18:56:26,432 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 18:56:26,432 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 18:56:26,436 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 18:56:26,446 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:56:26" (1/2) ... [2024-06-03 18:56:26,447 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3352580b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:56:26, skipping insertion in model container [2024-06-03 18:56:26,447 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:56:26" (1/2) ... [2024-06-03 18:56:26,449 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d2dcb3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:56:26, skipping insertion in model container [2024-06-03 18:56:26,449 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:56:26" (2/2) ... [2024-06-03 18:56:26,451 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3352580b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26, skipping insertion in model container [2024-06-03 18:56:26,451 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:56:26" (2/2) ... [2024-06-03 18:56:26,451 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 18:56:26,489 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 18:56:26,490 INFO L97 edCorrectnessWitness]: Location invariant before [L767-L767] ((((! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 18:56:26,490 INFO L97 edCorrectnessWitness]: Location invariant before [L768-L768] ((((! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 18:56:26,491 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 18:56:26,491 INFO L106 edCorrectnessWitness]: ghost_update [L765-L765] multithreaded = 1; [2024-06-03 18:56:26,527 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 18:56:26,805 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:56:26,814 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 18:56:26,902 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:56:26,936 INFO L206 MainTranslator]: Completed translation [2024-06-03 18:56:26,936 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26 WrapperNode [2024-06-03 18:56:26,937 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 18:56:26,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 18:56:26,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 18:56:26,938 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 18:56:26,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (1/1) ... [2024-06-03 18:56:26,969 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (1/1) ... [2024-06-03 18:56:26,993 INFO L138 Inliner]: procedures = 174, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 57 [2024-06-03 18:56:26,994 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 18:56:26,995 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 18:56:26,995 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 18:56:26,995 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 18:56:27,003 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (1/1) ... [2024-06-03 18:56:27,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (1/1) ... [2024-06-03 18:56:27,010 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (1/1) ... [2024-06-03 18:56:27,027 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]. [2024-06-03 18:56:27,027 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (1/1) ... [2024-06-03 18:56:27,027 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (1/1) ... [2024-06-03 18:56:27,038 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (1/1) ... [2024-06-03 18:56:27,053 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (1/1) ... [2024-06-03 18:56:27,054 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (1/1) ... [2024-06-03 18:56:27,054 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (1/1) ... [2024-06-03 18:56:27,056 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 18:56:27,056 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 18:56:27,056 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 18:56:27,056 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 18:56:27,057 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (1/1) ... [2024-06-03 18:56:27,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:56:27,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 18:56:27,079 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) [2024-06-03 18:56:27,118 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 [2024-06-03 18:56:27,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 18:56:27,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 18:56:27,145 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 18:56:27,145 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 18:56:27,145 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 18:56:27,145 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 18:56:27,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 18:56:27,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 18:56:27,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 18:56:27,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 18:56:27,147 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 18:56:27,272 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 18:56:27,273 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 18:56:27,435 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 18:56:27,438 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 18:56:27,537 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 18:56:27,537 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 18:56:27,539 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:56:27 BoogieIcfgContainer [2024-06-03 18:56:27,539 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 18:56:27,541 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 18:56:27,541 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 18:56:27,543 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 18:56:27,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 06:56:26" (1/4) ... [2024-06-03 18:56:27,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c0eaf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:56:27, skipping insertion in model container [2024-06-03 18:56:27,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:56:26" (2/4) ... [2024-06-03 18:56:27,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c0eaf0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:56:27, skipping insertion in model container [2024-06-03 18:56:27,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:56:26" (3/4) ... [2024-06-03 18:56:27,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c0eaf0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:56:27, skipping insertion in model container [2024-06-03 18:56:27,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:56:27" (4/4) ... [2024-06-03 18:56:27,547 INFO L112 eAbstractionObserver]: Analyzing ICFG safe036.i [2024-06-03 18:56:27,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 18:56:27,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-03 18:56:27,561 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 18:56:27,595 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 18:56:27,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 32 transitions, 72 flow [2024-06-03 18:56:27,645 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2024-06-03 18:56:27,648 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:56:27,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 0/30 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. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 18:56:27,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 32 transitions, 72 flow [2024-06-03 18:56:27,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 24 transitions, 54 flow [2024-06-03 18:56:27,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 18:56:27,670 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@15e8d92e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 18:56:27,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-03 18:56:27,672 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 18:56:27,674 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 18:56:27,674 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:56:27,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:27,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 18:56:27,681 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)] === [2024-06-03 18:56:27,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1644830107, now seen corresponding path program 1 times [2024-06-03 18:56:27,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:27,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691976020] [2024-06-03 18:56:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:27,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:28,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:28,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691976020] [2024-06-03 18:56:28,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691976020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:28,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:28,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 18:56:28,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616324644] [2024-06-03 18:56:28,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:28,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 18:56:28,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:28,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 18:56:28,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 18:56:28,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 32 [2024-06-03 18:56:28,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:28,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:28,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 32 [2024-06-03 18:56:28,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:28,235 INFO L124 PetriNetUnfolderBase]: 66/166 cut-off events. [2024-06-03 18:56:28,238 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-03 18:56:28,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 166 events. 66/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 648 event pairs, 33 based on Foata normal form. 1/152 useless extension candidates. Maximal degree in co-relation 297. Up to 124 conditions per place. [2024-06-03 18:56:28,243 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 19 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-06-03 18:56:28,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 113 flow [2024-06-03 18:56:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 18:56:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 18:56:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-06-03 18:56:28,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-03 18:56:28,254 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 54 flow. Second operand 3 states and 66 transitions. [2024-06-03 18:56:28,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 113 flow [2024-06-03 18:56:28,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-03 18:56:28,258 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 73 flow [2024-06-03 18:56:28,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-06-03 18:56:28,261 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-03 18:56:28,261 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 73 flow [2024-06-03 18:56:28,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:28,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:28,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:28,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 18:56:28,262 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)] === [2024-06-03 18:56:28,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:28,263 INFO L85 PathProgramCache]: Analyzing trace with hash 133969518, now seen corresponding path program 1 times [2024-06-03 18:56:28,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:28,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115533859] [2024-06-03 18:56:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:28,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:28,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:28,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115533859] [2024-06-03 18:56:28,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115533859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:28,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:28,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:56:28,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170220352] [2024-06-03 18:56:28,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:28,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:56:28,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:28,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:56:28,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:56:28,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 32 [2024-06-03 18:56:28,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:28,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:28,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 32 [2024-06-03 18:56:28,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:28,526 INFO L124 PetriNetUnfolderBase]: 80/183 cut-off events. [2024-06-03 18:56:28,527 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-06-03 18:56:28,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 183 events. 80/183 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 702 event pairs, 34 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 392. Up to 139 conditions per place. [2024-06-03 18:56:28,528 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 24 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-03 18:56:28,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 157 flow [2024-06-03 18:56:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:56:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:56:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-06-03 18:56:28,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6484375 [2024-06-03 18:56:28,530 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 73 flow. Second operand 4 states and 83 transitions. [2024-06-03 18:56:28,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 157 flow [2024-06-03 18:56:28,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 18:56:28,531 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 97 flow [2024-06-03 18:56:28,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-06-03 18:56:28,532 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-06-03 18:56:28,532 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 97 flow [2024-06-03 18:56:28,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:28,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:28,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:28,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 18:56:28,533 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)] === [2024-06-03 18:56:28,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:28,533 INFO L85 PathProgramCache]: Analyzing trace with hash -439591465, now seen corresponding path program 1 times [2024-06-03 18:56:28,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:28,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761945307] [2024-06-03 18:56:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:28,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:28,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:28,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761945307] [2024-06-03 18:56:28,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761945307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:28,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:28,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:56:28,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673470375] [2024-06-03 18:56:28,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:28,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:56:28,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:56:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:56:28,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 32 [2024-06-03 18:56:28,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:28,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:28,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 32 [2024-06-03 18:56:28,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:28,766 INFO L124 PetriNetUnfolderBase]: 79/185 cut-off events. [2024-06-03 18:56:28,766 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-06-03 18:56:28,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 185 events. 79/185 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 697 event pairs, 34 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 443. Up to 145 conditions per place. [2024-06-03 18:56:28,768 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 23 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-03 18:56:28,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 171 flow [2024-06-03 18:56:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:56:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:56:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-06-03 18:56:28,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6171875 [2024-06-03 18:56:28,769 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 97 flow. Second operand 4 states and 79 transitions. [2024-06-03 18:56:28,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 171 flow [2024-06-03 18:56:28,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 162 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-03 18:56:28,771 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 113 flow [2024-06-03 18:56:28,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2024-06-03 18:56:28,772 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-06-03 18:56:28,772 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 113 flow [2024-06-03 18:56:28,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:28,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:28,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:28,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 18:56:28,772 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)] === [2024-06-03 18:56:28,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:28,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2027892984, now seen corresponding path program 1 times [2024-06-03 18:56:28,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:28,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676457125] [2024-06-03 18:56:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:28,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:28,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:28,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676457125] [2024-06-03 18:56:28,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676457125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:28,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:28,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:56:28,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513939231] [2024-06-03 18:56:28,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:28,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:56:28,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:28,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:56:28,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:56:28,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:28,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:28,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:28,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:28,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:28,958 INFO L124 PetriNetUnfolderBase]: 95/213 cut-off events. [2024-06-03 18:56:28,958 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-06-03 18:56:28,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 213 events. 95/213 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 795 event pairs, 13 based on Foata normal form. 4/215 useless extension candidates. Maximal degree in co-relation 538. Up to 138 conditions per place. [2024-06-03 18:56:28,960 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 31 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2024-06-03 18:56:28,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 225 flow [2024-06-03 18:56:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:56:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:56:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-03 18:56:28,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-03 18:56:28,962 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 113 flow. Second operand 6 states and 111 transitions. [2024-06-03 18:56:28,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 225 flow [2024-06-03 18:56:28,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 216 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-03 18:56:28,963 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 129 flow [2024-06-03 18:56:28,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2024-06-03 18:56:28,964 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-03 18:56:28,964 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 129 flow [2024-06-03 18:56:28,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:28,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:28,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:28,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 18:56:28,965 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)] === [2024-06-03 18:56:28,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:28,966 INFO L85 PathProgramCache]: Analyzing trace with hash -791715360, now seen corresponding path program 1 times [2024-06-03 18:56:28,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:28,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861029550] [2024-06-03 18:56:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:28,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:29,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:29,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861029550] [2024-06-03 18:56:29,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861029550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:29,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:29,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:56:29,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323310930] [2024-06-03 18:56:29,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:29,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:56:29,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:29,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:56:29,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:56:29,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:29,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:29,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:29,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:29,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:29,132 INFO L124 PetriNetUnfolderBase]: 98/219 cut-off events. [2024-06-03 18:56:29,132 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-03 18:56:29,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 219 events. 98/219 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 840 event pairs, 25 based on Foata normal form. 1/217 useless extension candidates. Maximal degree in co-relation 602. Up to 160 conditions per place. [2024-06-03 18:56:29,134 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 31 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2024-06-03 18:56:29,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 261 flow [2024-06-03 18:56:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:56:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:56:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-03 18:56:29,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 18:56:29,136 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 129 flow. Second operand 5 states and 96 transitions. [2024-06-03 18:56:29,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 261 flow [2024-06-03 18:56:29,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 245 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 18:56:29,138 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 166 flow [2024-06-03 18:56:29,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-03 18:56:29,138 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-03 18:56:29,139 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 166 flow [2024-06-03 18:56:29,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:29,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:29,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:29,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 18:56:29,140 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)] === [2024-06-03 18:56:29,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:29,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1526968378, now seen corresponding path program 2 times [2024-06-03 18:56:29,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:29,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418113251] [2024-06-03 18:56:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:29,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:29,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418113251] [2024-06-03 18:56:29,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418113251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:29,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:29,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:56:29,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130269661] [2024-06-03 18:56:29,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:29,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:56:29,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:56:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:56:29,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:29,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:29,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:29,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:29,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:29,288 INFO L124 PetriNetUnfolderBase]: 96/214 cut-off events. [2024-06-03 18:56:29,288 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2024-06-03 18:56:29,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 214 events. 96/214 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 825 event pairs, 28 based on Foata normal form. 1/211 useless extension candidates. Maximal degree in co-relation 640. Up to 158 conditions per place. [2024-06-03 18:56:29,290 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 27 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2024-06-03 18:56:29,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 254 flow [2024-06-03 18:56:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:56:29,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:56:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-03 18:56:29,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-03 18:56:29,291 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 166 flow. Second operand 5 states and 92 transitions. [2024-06-03 18:56:29,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 254 flow [2024-06-03 18:56:29,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 250 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 18:56:29,294 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 187 flow [2024-06-03 18:56:29,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2024-06-03 18:56:29,294 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2024-06-03 18:56:29,294 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 187 flow [2024-06-03 18:56:29,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:29,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:29,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:29,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 18:56:29,295 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)] === [2024-06-03 18:56:29,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:29,296 INFO L85 PathProgramCache]: Analyzing trace with hash 226717489, now seen corresponding path program 1 times [2024-06-03 18:56:29,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:29,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094959984] [2024-06-03 18:56:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:29,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:29,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094959984] [2024-06-03 18:56:29,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094959984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:29,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:29,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:56:29,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573879439] [2024-06-03 18:56:29,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:29,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:56:29,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:29,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:56:29,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:56:29,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:29,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:29,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:29,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:29,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:29,528 INFO L124 PetriNetUnfolderBase]: 99/224 cut-off events. [2024-06-03 18:56:29,529 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-03 18:56:29,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 224 events. 99/224 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 867 event pairs, 23 based on Foata normal form. 1/223 useless extension candidates. Maximal degree in co-relation 690. Up to 160 conditions per place. [2024-06-03 18:56:29,530 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 37 selfloop transitions, 9 changer transitions 0/52 dead transitions. [2024-06-03 18:56:29,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 319 flow [2024-06-03 18:56:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:56:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:56:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-03 18:56:29,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-03 18:56:29,533 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 187 flow. Second operand 6 states and 111 transitions. [2024-06-03 18:56:29,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 319 flow [2024-06-03 18:56:29,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 297 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 18:56:29,536 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 200 flow [2024-06-03 18:56:29,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2024-06-03 18:56:29,536 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-06-03 18:56:29,537 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 200 flow [2024-06-03 18:56:29,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:29,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:29,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:29,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 18:56:29,537 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)] === [2024-06-03 18:56:29,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:29,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1042176055, now seen corresponding path program 2 times [2024-06-03 18:56:29,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:29,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570819134] [2024-06-03 18:56:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:29,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:29,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:29,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570819134] [2024-06-03 18:56:29,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570819134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:29,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:29,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:56:29,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010844045] [2024-06-03 18:56:29,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:29,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:56:29,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:29,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:56:29,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:56:29,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:29,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:29,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:29,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:29,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:29,688 INFO L124 PetriNetUnfolderBase]: 102/230 cut-off events. [2024-06-03 18:56:29,688 INFO L125 PetriNetUnfolderBase]: For 631/631 co-relation queries the response was YES. [2024-06-03 18:56:29,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 230 events. 102/230 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 890 event pairs, 24 based on Foata normal form. 1/228 useless extension candidates. Maximal degree in co-relation 745. Up to 149 conditions per place. [2024-06-03 18:56:29,689 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 32 selfloop transitions, 16 changer transitions 0/54 dead transitions. [2024-06-03 18:56:29,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 360 flow [2024-06-03 18:56:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:56:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:56:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-03 18:56:29,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2024-06-03 18:56:29,691 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 200 flow. Second operand 6 states and 113 transitions. [2024-06-03 18:56:29,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 360 flow [2024-06-03 18:56:29,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 54 transitions, 341 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 18:56:29,693 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 246 flow [2024-06-03 18:56:29,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2024-06-03 18:56:29,693 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 22 predicate places. [2024-06-03 18:56:29,694 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 246 flow [2024-06-03 18:56:29,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:29,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:29,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:29,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 18:56:29,694 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)] === [2024-06-03 18:56:29,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:29,695 INFO L85 PathProgramCache]: Analyzing trace with hash 69403537, now seen corresponding path program 1 times [2024-06-03 18:56:29,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:29,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191837184] [2024-06-03 18:56:29,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:29,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:29,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:29,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191837184] [2024-06-03 18:56:29,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191837184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:29,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:29,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:56:29,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938084582] [2024-06-03 18:56:29,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:29,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:56:29,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:56:29,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:56:29,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:29,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 246 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:29,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:29,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:29,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:29,849 INFO L124 PetriNetUnfolderBase]: 105/236 cut-off events. [2024-06-03 18:56:29,849 INFO L125 PetriNetUnfolderBase]: For 826/826 co-relation queries the response was YES. [2024-06-03 18:56:29,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 236 events. 105/236 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 932 event pairs, 24 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 807. Up to 161 conditions per place. [2024-06-03 18:56:29,851 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 38 selfloop transitions, 14 changer transitions 0/58 dead transitions. [2024-06-03 18:56:29,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 58 transitions, 408 flow [2024-06-03 18:56:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:56:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:56:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-03 18:56:29,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2024-06-03 18:56:29,852 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 246 flow. Second operand 6 states and 113 transitions. [2024-06-03 18:56:29,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 58 transitions, 408 flow [2024-06-03 18:56:29,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 390 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 18:56:29,854 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 281 flow [2024-06-03 18:56:29,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=281, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2024-06-03 18:56:29,855 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 26 predicate places. [2024-06-03 18:56:29,855 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 281 flow [2024-06-03 18:56:29,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:29,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:29,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:29,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 18:56:29,856 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)] === [2024-06-03 18:56:29,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:29,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1268293267, now seen corresponding path program 3 times [2024-06-03 18:56:29,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:29,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724179578] [2024-06-03 18:56:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:29,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:29,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:29,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724179578] [2024-06-03 18:56:29,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724179578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:29,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:29,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:56:29,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646803299] [2024-06-03 18:56:29,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:29,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:56:29,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:29,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:56:29,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:56:29,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:29,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 281 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:29,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:29,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:29,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:30,018 INFO L124 PetriNetUnfolderBase]: 103/229 cut-off events. [2024-06-03 18:56:30,018 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2024-06-03 18:56:30,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 229 events. 103/229 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 906 event pairs, 30 based on Foata normal form. 1/224 useless extension candidates. Maximal degree in co-relation 840. Up to 152 conditions per place. [2024-06-03 18:56:30,020 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 32 selfloop transitions, 16 changer transitions 0/54 dead transitions. [2024-06-03 18:56:30,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 393 flow [2024-06-03 18:56:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:56:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:56:30,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-03 18:56:30,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677083333333334 [2024-06-03 18:56:30,021 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 281 flow. Second operand 6 states and 109 transitions. [2024-06-03 18:56:30,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 393 flow [2024-06-03 18:56:30,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 377 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 18:56:30,024 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 302 flow [2024-06-03 18:56:30,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2024-06-03 18:56:30,025 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 30 predicate places. [2024-06-03 18:56:30,025 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 302 flow [2024-06-03 18:56:30,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:30,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:30,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:30,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 18:56:30,026 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)] === [2024-06-03 18:56:30,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:30,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2114274415, now seen corresponding path program 2 times [2024-06-03 18:56:30,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:30,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079243617] [2024-06-03 18:56:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:30,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:30,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:30,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079243617] [2024-06-03 18:56:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079243617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:30,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:56:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106160367] [2024-06-03 18:56:30,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:30,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:56:30,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:56:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:56:30,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:30,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:30,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:30,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:30,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:30,168 INFO L124 PetriNetUnfolderBase]: 106/239 cut-off events. [2024-06-03 18:56:30,168 INFO L125 PetriNetUnfolderBase]: For 1180/1180 co-relation queries the response was YES. [2024-06-03 18:56:30,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 239 events. 106/239 cut-off events. For 1180/1180 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 967 event pairs, 26 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 906. Up to 162 conditions per place. [2024-06-03 18:56:30,169 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 35 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2024-06-03 18:56:30,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 454 flow [2024-06-03 18:56:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:56:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:56:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-03 18:56:30,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2024-06-03 18:56:30,171 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 302 flow. Second operand 6 states and 110 transitions. [2024-06-03 18:56:30,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 454 flow [2024-06-03 18:56:30,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 413 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 18:56:30,174 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 310 flow [2024-06-03 18:56:30,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2024-06-03 18:56:30,175 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2024-06-03 18:56:30,175 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 310 flow [2024-06-03 18:56:30,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:30,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:30,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:30,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 18:56:30,176 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)] === [2024-06-03 18:56:30,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:30,176 INFO L85 PathProgramCache]: Analyzing trace with hash -456485021, now seen corresponding path program 3 times [2024-06-03 18:56:30,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:30,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119518559] [2024-06-03 18:56:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:30,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:30,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:30,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119518559] [2024-06-03 18:56:30,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119518559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:30,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:30,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:56:30,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148807959] [2024-06-03 18:56:30,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:30,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:56:30,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:30,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:56:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:56:30,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:30,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:30,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:30,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:30,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:30,335 INFO L124 PetriNetUnfolderBase]: 104/239 cut-off events. [2024-06-03 18:56:30,335 INFO L125 PetriNetUnfolderBase]: For 1234/1234 co-relation queries the response was YES. [2024-06-03 18:56:30,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 239 events. 104/239 cut-off events. For 1234/1234 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 954 event pairs, 22 based on Foata normal form. 1/238 useless extension candidates. Maximal degree in co-relation 899. Up to 181 conditions per place. [2024-06-03 18:56:30,336 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 41 selfloop transitions, 9 changer transitions 0/56 dead transitions. [2024-06-03 18:56:30,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 56 transitions, 426 flow [2024-06-03 18:56:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:56:30,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:56:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-03 18:56:30,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-03 18:56:30,338 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 310 flow. Second operand 6 states and 105 transitions. [2024-06-03 18:56:30,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 56 transitions, 426 flow [2024-06-03 18:56:30,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 56 transitions, 387 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 18:56:30,340 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 294 flow [2024-06-03 18:56:30,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2024-06-03 18:56:30,341 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-06-03 18:56:30,341 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 294 flow [2024-06-03 18:56:30,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:30,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:30,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:30,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 18:56:30,342 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)] === [2024-06-03 18:56:30,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:30,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2105692623, now seen corresponding path program 1 times [2024-06-03 18:56:30,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:30,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94248363] [2024-06-03 18:56:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:30,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:30,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:30,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94248363] [2024-06-03 18:56:30,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94248363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:30,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:30,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:56:30,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691120785] [2024-06-03 18:56:30,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:30,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:56:30,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:30,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:56:30,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:56:30,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:30,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 294 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:30,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:30,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:30,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:30,535 INFO L124 PetriNetUnfolderBase]: 101/234 cut-off events. [2024-06-03 18:56:30,535 INFO L125 PetriNetUnfolderBase]: For 1320/1320 co-relation queries the response was YES. [2024-06-03 18:56:30,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 234 events. 101/234 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 927 event pairs, 21 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 857. Up to 173 conditions per place. [2024-06-03 18:56:30,537 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 43 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-03 18:56:30,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 57 transitions, 414 flow [2024-06-03 18:56:30,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:56:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:56:30,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-03 18:56:30,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-03 18:56:30,538 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 294 flow. Second operand 6 states and 104 transitions. [2024-06-03 18:56:30,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 57 transitions, 414 flow [2024-06-03 18:56:30,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 377 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 18:56:30,541 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 277 flow [2024-06-03 18:56:30,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2024-06-03 18:56:30,541 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-03 18:56:30,541 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 277 flow [2024-06-03 18:56:30,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:30,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:30,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:30,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 18:56:30,542 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)] === [2024-06-03 18:56:30,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:30,542 INFO L85 PathProgramCache]: Analyzing trace with hash 625380894, now seen corresponding path program 1 times [2024-06-03 18:56:30,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:30,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996261671] [2024-06-03 18:56:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:30,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:30,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:30,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996261671] [2024-06-03 18:56:30,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996261671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:30,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:30,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:30,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590446444] [2024-06-03 18:56:30,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:30,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:30,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:30,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:30,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:30,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:30,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 277 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:30,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:30,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:30,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:30,761 INFO L124 PetriNetUnfolderBase]: 112/255 cut-off events. [2024-06-03 18:56:30,762 INFO L125 PetriNetUnfolderBase]: For 1668/1668 co-relation queries the response was YES. [2024-06-03 18:56:30,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 255 events. 112/255 cut-off events. For 1668/1668 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1042 event pairs, 9 based on Foata normal form. 2/255 useless extension candidates. Maximal degree in co-relation 955. Up to 150 conditions per place. [2024-06-03 18:56:30,763 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 51 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-03 18:56:30,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 487 flow [2024-06-03 18:56:30,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:30,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 18:56:30,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2024-06-03 18:56:30,764 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 277 flow. Second operand 8 states and 142 transitions. [2024-06-03 18:56:30,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 487 flow [2024-06-03 18:56:30,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 469 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 18:56:30,768 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 305 flow [2024-06-03 18:56:30,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=305, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2024-06-03 18:56:30,768 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-03 18:56:30,768 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 305 flow [2024-06-03 18:56:30,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:30,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:30,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:30,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 18:56:30,769 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)] === [2024-06-03 18:56:30,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:30,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1551087334, now seen corresponding path program 2 times [2024-06-03 18:56:30,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:30,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959227341] [2024-06-03 18:56:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:30,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:30,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959227341] [2024-06-03 18:56:30,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959227341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:30,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:30,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:30,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253278437] [2024-06-03 18:56:30,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:30,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:30,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:30,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:30,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:30,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:30,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 305 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:30,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:30,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:30,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:31,004 INFO L124 PetriNetUnfolderBase]: 109/250 cut-off events. [2024-06-03 18:56:31,014 INFO L125 PetriNetUnfolderBase]: For 1744/1744 co-relation queries the response was YES. [2024-06-03 18:56:31,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 250 events. 109/250 cut-off events. For 1744/1744 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1013 event pairs, 19 based on Foata normal form. 2/250 useless extension candidates. Maximal degree in co-relation 948. Up to 174 conditions per place. [2024-06-03 18:56:31,017 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 50 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-03 18:56:31,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 461 flow [2024-06-03 18:56:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 18:56:31,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 18:56:31,018 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 305 flow. Second operand 7 states and 126 transitions. [2024-06-03 18:56:31,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 461 flow [2024-06-03 18:56:31,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 437 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 18:56:31,022 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 305 flow [2024-06-03 18:56:31,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=305, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2024-06-03 18:56:31,024 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 39 predicate places. [2024-06-03 18:56:31,024 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 305 flow [2024-06-03 18:56:31,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:31,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:31,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:31,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 18:56:31,025 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)] === [2024-06-03 18:56:31,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:31,025 INFO L85 PathProgramCache]: Analyzing trace with hash 628242814, now seen corresponding path program 1 times [2024-06-03 18:56:31,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:31,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713654731] [2024-06-03 18:56:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:31,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:31,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:31,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713654731] [2024-06-03 18:56:31,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713654731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:31,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:31,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:31,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528830660] [2024-06-03 18:56:31,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:31,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:31,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:31,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:31,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 305 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:31,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:31,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:31,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:31,205 INFO L124 PetriNetUnfolderBase]: 112/257 cut-off events. [2024-06-03 18:56:31,206 INFO L125 PetriNetUnfolderBase]: For 1828/1828 co-relation queries the response was YES. [2024-06-03 18:56:31,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014 conditions, 257 events. 112/257 cut-off events. For 1828/1828 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1065 event pairs, 18 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 980. Up to 182 conditions per place. [2024-06-03 18:56:31,207 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 50 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-03 18:56:31,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 67 transitions, 475 flow [2024-06-03 18:56:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:31,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 18:56:31,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 18:56:31,208 INFO L175 Difference]: Start difference. First operand has 70 places, 51 transitions, 305 flow. Second operand 7 states and 126 transitions. [2024-06-03 18:56:31,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 67 transitions, 475 flow [2024-06-03 18:56:31,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 453 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 18:56:31,213 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 328 flow [2024-06-03 18:56:31,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=328, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2024-06-03 18:56:31,214 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-03 18:56:31,214 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 328 flow [2024-06-03 18:56:31,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:31,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:31,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:31,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 18:56:31,215 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)] === [2024-06-03 18:56:31,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:31,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2100007986, now seen corresponding path program 3 times [2024-06-03 18:56:31,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:31,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422004351] [2024-06-03 18:56:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:31,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:31,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:31,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422004351] [2024-06-03 18:56:31,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422004351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:31,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:31,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:31,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808635103] [2024-06-03 18:56:31,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:31,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:31,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:31,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:31,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:31,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:31,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 328 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:31,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:31,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:31,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:31,391 INFO L124 PetriNetUnfolderBase]: 116/264 cut-off events. [2024-06-03 18:56:31,392 INFO L125 PetriNetUnfolderBase]: For 2202/2202 co-relation queries the response was YES. [2024-06-03 18:56:31,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1076 conditions, 264 events. 116/264 cut-off events. For 2202/2202 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1090 event pairs, 19 based on Foata normal form. 2/263 useless extension candidates. Maximal degree in co-relation 1041. Up to 172 conditions per place. [2024-06-03 18:56:31,393 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 43 selfloop transitions, 17 changer transitions 0/66 dead transitions. [2024-06-03 18:56:31,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 486 flow [2024-06-03 18:56:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 18:56:31,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669642857142857 [2024-06-03 18:56:31,394 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 328 flow. Second operand 7 states and 127 transitions. [2024-06-03 18:56:31,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 486 flow [2024-06-03 18:56:31,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 66 transitions, 457 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 18:56:31,400 INFO L231 Difference]: Finished difference. Result has 73 places, 54 transitions, 349 flow [2024-06-03 18:56:31,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=349, PETRI_PLACES=73, PETRI_TRANSITIONS=54} [2024-06-03 18:56:31,401 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2024-06-03 18:56:31,401 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 54 transitions, 349 flow [2024-06-03 18:56:31,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:31,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:31,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:31,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 18:56:31,402 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)] === [2024-06-03 18:56:31,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:31,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2100012946, now seen corresponding path program 2 times [2024-06-03 18:56:31,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:31,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339306864] [2024-06-03 18:56:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:31,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:31,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:31,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339306864] [2024-06-03 18:56:31,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339306864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:31,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:31,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:31,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914994905] [2024-06-03 18:56:31,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:31,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:31,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:31,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:31,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:31,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:31,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 54 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:31,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:31,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:31,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:31,558 INFO L124 PetriNetUnfolderBase]: 124/280 cut-off events. [2024-06-03 18:56:31,558 INFO L125 PetriNetUnfolderBase]: For 2535/2535 co-relation queries the response was YES. [2024-06-03 18:56:31,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 280 events. 124/280 cut-off events. For 2535/2535 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1203 event pairs, 20 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 1148. Up to 161 conditions per place. [2024-06-03 18:56:31,560 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 42 selfloop transitions, 25 changer transitions 0/73 dead transitions. [2024-06-03 18:56:31,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 635 flow [2024-06-03 18:56:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 18:56:31,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-03 18:56:31,561 INFO L175 Difference]: Start difference. First operand has 73 places, 54 transitions, 349 flow. Second operand 7 states and 133 transitions. [2024-06-03 18:56:31,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 635 flow [2024-06-03 18:56:31,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 595 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 18:56:31,566 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 422 flow [2024-06-03 18:56:31,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=422, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2024-06-03 18:56:31,566 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-03 18:56:31,566 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 422 flow [2024-06-03 18:56:31,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:31,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:31,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:31,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 18:56:31,567 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)] === [2024-06-03 18:56:31,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:31,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2100192436, now seen corresponding path program 3 times [2024-06-03 18:56:31,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:31,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675887237] [2024-06-03 18:56:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:31,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:31,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:31,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675887237] [2024-06-03 18:56:31,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675887237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:31,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:31,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:31,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178741021] [2024-06-03 18:56:31,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:31,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:31,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:31,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:31,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:31,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:31,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 422 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:31,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:31,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:31,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:31,721 INFO L124 PetriNetUnfolderBase]: 122/277 cut-off events. [2024-06-03 18:56:31,721 INFO L125 PetriNetUnfolderBase]: For 2681/2681 co-relation queries the response was YES. [2024-06-03 18:56:31,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 277 events. 122/277 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. 1/274 useless extension candidates. Maximal degree in co-relation 1149. Up to 159 conditions per place. [2024-06-03 18:56:31,723 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 40 selfloop transitions, 26 changer transitions 0/72 dead transitions. [2024-06-03 18:56:31,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 618 flow [2024-06-03 18:56:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 18:56:31,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5848214285714286 [2024-06-03 18:56:31,724 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 422 flow. Second operand 7 states and 131 transitions. [2024-06-03 18:56:31,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 618 flow [2024-06-03 18:56:31,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 579 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-03 18:56:31,729 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 440 flow [2024-06-03 18:56:31,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=440, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2024-06-03 18:56:31,729 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 49 predicate places. [2024-06-03 18:56:31,729 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 440 flow [2024-06-03 18:56:31,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:31,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:31,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:31,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 18:56:31,730 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)] === [2024-06-03 18:56:31,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:31,730 INFO L85 PathProgramCache]: Analyzing trace with hash 915848286, now seen corresponding path program 1 times [2024-06-03 18:56:31,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:31,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633859822] [2024-06-03 18:56:31,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:31,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:31,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633859822] [2024-06-03 18:56:31,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633859822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:31,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:31,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:31,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733658599] [2024-06-03 18:56:31,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:31,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:31,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:31,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:31,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:31,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:31,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 440 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:31,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:31,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:31,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:31,901 INFO L124 PetriNetUnfolderBase]: 126/285 cut-off events. [2024-06-03 18:56:31,901 INFO L125 PetriNetUnfolderBase]: For 3170/3170 co-relation queries the response was YES. [2024-06-03 18:56:31,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 285 events. 126/285 cut-off events. For 3170/3170 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1246 event pairs, 20 based on Foata normal form. 2/283 useless extension candidates. Maximal degree in co-relation 1218. Up to 196 conditions per place. [2024-06-03 18:56:31,903 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 50 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-03 18:56:31,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 73 transitions, 608 flow [2024-06-03 18:56:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 18:56:31,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669642857142857 [2024-06-03 18:56:31,904 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 440 flow. Second operand 7 states and 127 transitions. [2024-06-03 18:56:31,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 73 transitions, 608 flow [2024-06-03 18:56:31,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 73 transitions, 551 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 18:56:31,909 INFO L231 Difference]: Finished difference. Result has 81 places, 61 transitions, 429 flow [2024-06-03 18:56:31,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=81, PETRI_TRANSITIONS=61} [2024-06-03 18:56:31,910 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-03 18:56:31,910 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 61 transitions, 429 flow [2024-06-03 18:56:31,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:31,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:31,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:31,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 18:56:31,911 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)] === [2024-06-03 18:56:31,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:31,911 INFO L85 PathProgramCache]: Analyzing trace with hash -940851790, now seen corresponding path program 4 times [2024-06-03 18:56:31,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:31,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989276206] [2024-06-03 18:56:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:31,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:32,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:32,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989276206] [2024-06-03 18:56:32,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989276206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:32,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:32,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:32,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437860928] [2024-06-03 18:56:32,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:32,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:32,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:32,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:32,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:32,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:32,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 61 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:32,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:32,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:32,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:32,083 INFO L124 PetriNetUnfolderBase]: 123/276 cut-off events. [2024-06-03 18:56:32,083 INFO L125 PetriNetUnfolderBase]: For 3009/3009 co-relation queries the response was YES. [2024-06-03 18:56:32,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 276 events. 123/276 cut-off events. For 3009/3009 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1193 event pairs, 25 based on Foata normal form. 2/272 useless extension candidates. Maximal degree in co-relation 1155. Up to 185 conditions per place. [2024-06-03 18:56:32,085 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 47 selfloop transitions, 17 changer transitions 0/70 dead transitions. [2024-06-03 18:56:32,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 70 transitions, 577 flow [2024-06-03 18:56:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 18:56:32,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 18:56:32,086 INFO L175 Difference]: Start difference. First operand has 81 places, 61 transitions, 429 flow. Second operand 7 states and 124 transitions. [2024-06-03 18:56:32,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 70 transitions, 577 flow [2024-06-03 18:56:32,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 541 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 18:56:32,091 INFO L231 Difference]: Finished difference. Result has 83 places, 61 transitions, 431 flow [2024-06-03 18:56:32,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=83, PETRI_TRANSITIONS=61} [2024-06-03 18:56:32,091 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-03 18:56:32,091 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 61 transitions, 431 flow [2024-06-03 18:56:32,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:32,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:32,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:32,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 18:56:32,092 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)] === [2024-06-03 18:56:32,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:32,093 INFO L85 PathProgramCache]: Analyzing trace with hash -936571886, now seen corresponding path program 4 times [2024-06-03 18:56:32,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:32,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175330076] [2024-06-03 18:56:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:32,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:32,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:32,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175330076] [2024-06-03 18:56:32,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175330076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:32,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:32,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:32,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001858321] [2024-06-03 18:56:32,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:32,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:32,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:32,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:32,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:32,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:32,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 61 transitions, 431 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:32,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:32,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:32,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:32,246 INFO L124 PetriNetUnfolderBase]: 131/293 cut-off events. [2024-06-03 18:56:32,246 INFO L125 PetriNetUnfolderBase]: For 3350/3350 co-relation queries the response was YES. [2024-06-03 18:56:32,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1298 conditions, 293 events. 131/293 cut-off events. For 3350/3350 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1307 event pairs, 25 based on Foata normal form. 1/288 useless extension candidates. Maximal degree in co-relation 1257. Up to 172 conditions per place. [2024-06-03 18:56:32,248 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 40 selfloop transitions, 29 changer transitions 0/75 dead transitions. [2024-06-03 18:56:32,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 719 flow [2024-06-03 18:56:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 18:56:32,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-03 18:56:32,249 INFO L175 Difference]: Start difference. First operand has 83 places, 61 transitions, 431 flow. Second operand 7 states and 130 transitions. [2024-06-03 18:56:32,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 719 flow [2024-06-03 18:56:32,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 671 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 18:56:32,256 INFO L231 Difference]: Finished difference. Result has 84 places, 65 transitions, 490 flow [2024-06-03 18:56:32,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=490, PETRI_PLACES=84, PETRI_TRANSITIONS=65} [2024-06-03 18:56:32,256 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-03 18:56:32,257 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 65 transitions, 490 flow [2024-06-03 18:56:32,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:32,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:32,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:32,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 18:56:32,257 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)] === [2024-06-03 18:56:32,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:32,258 INFO L85 PathProgramCache]: Analyzing trace with hash -936809036, now seen corresponding path program 5 times [2024-06-03 18:56:32,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:32,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495382074] [2024-06-03 18:56:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:32,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:32,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:32,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495382074] [2024-06-03 18:56:32,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495382074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:32,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:32,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:32,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446255669] [2024-06-03 18:56:32,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:32,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:32,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:32,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:32,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 65 transitions, 490 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:32,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:32,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:32,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:32,402 INFO L124 PetriNetUnfolderBase]: 129/290 cut-off events. [2024-06-03 18:56:32,403 INFO L125 PetriNetUnfolderBase]: For 3394/3394 co-relation queries the response was YES. [2024-06-03 18:56:32,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1269 conditions, 290 events. 129/290 cut-off events. For 3394/3394 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1290 event pairs, 25 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 1228. Up to 170 conditions per place. [2024-06-03 18:56:32,404 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 38 selfloop transitions, 30 changer transitions 0/74 dead transitions. [2024-06-03 18:56:32,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 690 flow [2024-06-03 18:56:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-03 18:56:32,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 18:56:32,405 INFO L175 Difference]: Start difference. First operand has 84 places, 65 transitions, 490 flow. Second operand 7 states and 128 transitions. [2024-06-03 18:56:32,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 690 flow [2024-06-03 18:56:32,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 74 transitions, 597 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 18:56:32,413 INFO L231 Difference]: Finished difference. Result has 86 places, 65 transitions, 462 flow [2024-06-03 18:56:32,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=462, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2024-06-03 18:56:32,413 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-06-03 18:56:32,413 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 462 flow [2024-06-03 18:56:32,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:32,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:32,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:32,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 18:56:32,414 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)] === [2024-06-03 18:56:32,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:32,414 INFO L85 PathProgramCache]: Analyzing trace with hash -651472016, now seen corresponding path program 6 times [2024-06-03 18:56:32,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:32,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649035612] [2024-06-03 18:56:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:32,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:32,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:32,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649035612] [2024-06-03 18:56:32,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649035612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:32,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:32,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046139162] [2024-06-03 18:56:32,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:32,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:32,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:32,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:32,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 462 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:32,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:32,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:32,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:32,580 INFO L124 PetriNetUnfolderBase]: 127/293 cut-off events. [2024-06-03 18:56:32,581 INFO L125 PetriNetUnfolderBase]: For 3237/3237 co-relation queries the response was YES. [2024-06-03 18:56:32,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 293 events. 127/293 cut-off events. For 3237/3237 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1285 event pairs, 17 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 1159. Up to 222 conditions per place. [2024-06-03 18:56:32,582 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 56 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-03 18:56:32,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 73 transitions, 614 flow [2024-06-03 18:56:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 18:56:32,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 18:56:32,583 INFO L175 Difference]: Start difference. First operand has 86 places, 65 transitions, 462 flow. Second operand 7 states and 120 transitions. [2024-06-03 18:56:32,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 73 transitions, 614 flow [2024-06-03 18:56:32,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 73 transitions, 546 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 18:56:32,590 INFO L231 Difference]: Finished difference. Result has 88 places, 65 transitions, 421 flow [2024-06-03 18:56:32,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=88, PETRI_TRANSITIONS=65} [2024-06-03 18:56:32,590 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2024-06-03 18:56:32,590 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 65 transitions, 421 flow [2024-06-03 18:56:32,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:32,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:32,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:32,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 18:56:32,591 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)] === [2024-06-03 18:56:32,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:32,591 INFO L85 PathProgramCache]: Analyzing trace with hash -298144176, now seen corresponding path program 2 times [2024-06-03 18:56:32,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:32,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037375933] [2024-06-03 18:56:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:32,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:32,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:32,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037375933] [2024-06-03 18:56:32,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037375933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:32,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:32,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:32,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80231018] [2024-06-03 18:56:32,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:32,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:32,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:32,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:32,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:32,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:32,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 65 transitions, 421 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:32,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:32,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:32,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:32,758 INFO L124 PetriNetUnfolderBase]: 131/298 cut-off events. [2024-06-03 18:56:32,759 INFO L125 PetriNetUnfolderBase]: For 3710/3710 co-relation queries the response was YES. [2024-06-03 18:56:32,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 298 events. 131/298 cut-off events. For 3710/3710 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1315 event pairs, 21 based on Foata normal form. 2/296 useless extension candidates. Maximal degree in co-relation 1146. Up to 206 conditions per place. [2024-06-03 18:56:32,760 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 52 selfloop transitions, 17 changer transitions 0/75 dead transitions. [2024-06-03 18:56:32,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 75 transitions, 585 flow [2024-06-03 18:56:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 18:56:32,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 18:56:32,761 INFO L175 Difference]: Start difference. First operand has 88 places, 65 transitions, 421 flow. Second operand 7 states and 124 transitions. [2024-06-03 18:56:32,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 75 transitions, 585 flow [2024-06-03 18:56:32,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 75 transitions, 536 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 18:56:32,769 INFO L231 Difference]: Finished difference. Result has 87 places, 66 transitions, 418 flow [2024-06-03 18:56:32,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=418, PETRI_PLACES=87, PETRI_TRANSITIONS=66} [2024-06-03 18:56:32,769 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-03 18:56:32,769 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 66 transitions, 418 flow [2024-06-03 18:56:32,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:32,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:32,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:32,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 18:56:32,770 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)] === [2024-06-03 18:56:32,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:32,770 INFO L85 PathProgramCache]: Analyzing trace with hash -651463088, now seen corresponding path program 3 times [2024-06-03 18:56:32,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:32,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791952697] [2024-06-03 18:56:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:32,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:32,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:32,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791952697] [2024-06-03 18:56:32,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791952697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:32,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:32,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:32,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706828250] [2024-06-03 18:56:32,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:32,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:32,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:32,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:32,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:32,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:32,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 66 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:32,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:32,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:32,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:32,949 INFO L124 PetriNetUnfolderBase]: 135/313 cut-off events. [2024-06-03 18:56:32,950 INFO L125 PetriNetUnfolderBase]: For 3995/3995 co-relation queries the response was YES. [2024-06-03 18:56:32,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 313 events. 135/313 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. 2/313 useless extension candidates. Maximal degree in co-relation 1182. Up to 235 conditions per place. [2024-06-03 18:56:32,951 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 60 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-03 18:56:32,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 76 transitions, 586 flow [2024-06-03 18:56:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 18:56:32,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 18:56:32,952 INFO L175 Difference]: Start difference. First operand has 87 places, 66 transitions, 418 flow. Second operand 7 states and 120 transitions. [2024-06-03 18:56:32,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 76 transitions, 586 flow [2024-06-03 18:56:32,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 76 transitions, 550 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 18:56:32,990 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 416 flow [2024-06-03 18:56:32,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=89, PETRI_TRANSITIONS=67} [2024-06-03 18:56:32,991 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-03 18:56:32,991 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 416 flow [2024-06-03 18:56:32,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:32,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:32,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:32,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 18:56:32,992 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)] === [2024-06-03 18:56:32,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:32,992 INFO L85 PathProgramCache]: Analyzing trace with hash -640987568, now seen corresponding path program 4 times [2024-06-03 18:56:32,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:32,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755005173] [2024-06-03 18:56:32,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:32,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:33,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:33,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755005173] [2024-06-03 18:56:33,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755005173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:33,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:33,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:56:33,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976803614] [2024-06-03 18:56:33,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:33,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:56:33,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:33,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:56:33,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:56:33,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:33,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:33,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:33,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:33,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:33,203 INFO L124 PetriNetUnfolderBase]: 132/308 cut-off events. [2024-06-03 18:56:33,203 INFO L125 PetriNetUnfolderBase]: For 3612/3612 co-relation queries the response was YES. [2024-06-03 18:56:33,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 308 events. 132/308 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. 2/308 useless extension candidates. Maximal degree in co-relation 1112. Up to 216 conditions per place. [2024-06-03 18:56:33,205 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 60 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-03 18:56:33,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 78 transitions, 584 flow [2024-06-03 18:56:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 18:56:33,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52734375 [2024-06-03 18:56:33,206 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 416 flow. Second operand 8 states and 135 transitions. [2024-06-03 18:56:33,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 78 transitions, 584 flow [2024-06-03 18:56:33,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 78 transitions, 560 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 18:56:33,213 INFO L231 Difference]: Finished difference. Result has 92 places, 67 transitions, 420 flow [2024-06-03 18:56:33,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=420, PETRI_PLACES=92, PETRI_TRANSITIONS=67} [2024-06-03 18:56:33,214 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 61 predicate places. [2024-06-03 18:56:33,214 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 67 transitions, 420 flow [2024-06-03 18:56:33,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:33,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:33,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:33,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 18:56:33,214 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)] === [2024-06-03 18:56:33,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:33,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1896845135, now seen corresponding path program 1 times [2024-06-03 18:56:33,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:33,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385094082] [2024-06-03 18:56:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:33,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:33,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:33,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385094082] [2024-06-03 18:56:33,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385094082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:33,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:33,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:33,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311180761] [2024-06-03 18:56:33,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:33,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:33,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:33,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:33,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 67 transitions, 420 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:33,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:33,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:33,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:33,477 INFO L124 PetriNetUnfolderBase]: 162/376 cut-off events. [2024-06-03 18:56:33,477 INFO L125 PetriNetUnfolderBase]: For 8267/8267 co-relation queries the response was YES. [2024-06-03 18:56:33,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1580 conditions, 376 events. 162/376 cut-off events. For 8267/8267 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1787 event pairs, 28 based on Foata normal form. 6/380 useless extension candidates. Maximal degree in co-relation 1536. Up to 177 conditions per place. [2024-06-03 18:56:33,479 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 65 selfloop transitions, 9 changer transitions 12/92 dead transitions. [2024-06-03 18:56:33,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 92 transitions, 726 flow [2024-06-03 18:56:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:56:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:56:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 18:56:33,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 18:56:33,480 INFO L175 Difference]: Start difference. First operand has 92 places, 67 transitions, 420 flow. Second operand 9 states and 162 transitions. [2024-06-03 18:56:33,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 92 transitions, 726 flow [2024-06-03 18:56:33,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 696 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 18:56:33,491 INFO L231 Difference]: Finished difference. Result has 95 places, 64 transitions, 393 flow [2024-06-03 18:56:33,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=393, PETRI_PLACES=95, PETRI_TRANSITIONS=64} [2024-06-03 18:56:33,492 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 64 predicate places. [2024-06-03 18:56:33,492 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 64 transitions, 393 flow [2024-06-03 18:56:33,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:33,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:33,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:33,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 18:56:33,492 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)] === [2024-06-03 18:56:33,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:33,493 INFO L85 PathProgramCache]: Analyzing trace with hash 352000369, now seen corresponding path program 2 times [2024-06-03 18:56:33,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:33,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564475932] [2024-06-03 18:56:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:33,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:33,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:33,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564475932] [2024-06-03 18:56:33,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564475932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:33,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:33,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:33,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286853254] [2024-06-03 18:56:33,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:33,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:33,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:33,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:33,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:33,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 64 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:33,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:33,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:33,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:33,747 INFO L124 PetriNetUnfolderBase]: 146/340 cut-off events. [2024-06-03 18:56:33,747 INFO L125 PetriNetUnfolderBase]: For 8785/8785 co-relation queries the response was YES. [2024-06-03 18:56:33,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 340 events. 146/340 cut-off events. For 8785/8785 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1579 event pairs, 26 based on Foata normal form. 6/344 useless extension candidates. Maximal degree in co-relation 1434. Up to 177 conditions per place. [2024-06-03 18:56:33,749 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 64 selfloop transitions, 8 changer transitions 6/84 dead transitions. [2024-06-03 18:56:33,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 84 transitions, 673 flow [2024-06-03 18:56:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 18:56:33,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2024-06-03 18:56:33,750 INFO L175 Difference]: Start difference. First operand has 95 places, 64 transitions, 393 flow. Second operand 8 states and 142 transitions. [2024-06-03 18:56:33,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 84 transitions, 673 flow [2024-06-03 18:56:33,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 84 transitions, 629 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-03 18:56:33,762 INFO L231 Difference]: Finished difference. Result has 90 places, 62 transitions, 365 flow [2024-06-03 18:56:33,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=365, PETRI_PLACES=90, PETRI_TRANSITIONS=62} [2024-06-03 18:56:33,762 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2024-06-03 18:56:33,762 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 62 transitions, 365 flow [2024-06-03 18:56:33,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:33,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:33,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:33,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 18:56:33,763 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)] === [2024-06-03 18:56:33,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:33,764 INFO L85 PathProgramCache]: Analyzing trace with hash 352177999, now seen corresponding path program 3 times [2024-06-03 18:56:33,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:33,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509974349] [2024-06-03 18:56:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:33,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:33,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:33,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509974349] [2024-06-03 18:56:33,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509974349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:33,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:33,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:33,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816668060] [2024-06-03 18:56:33,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:33,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:33,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:33,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:33,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:33,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:33,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 62 transitions, 365 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:33,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:33,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:33,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:33,972 INFO L124 PetriNetUnfolderBase]: 122/288 cut-off events. [2024-06-03 18:56:33,973 INFO L125 PetriNetUnfolderBase]: For 5628/5628 co-relation queries the response was YES. [2024-06-03 18:56:33,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1063 conditions, 288 events. 122/288 cut-off events. For 5628/5628 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1268 event pairs, 18 based on Foata normal form. 8/294 useless extension candidates. Maximal degree in co-relation 1021. Up to 177 conditions per place. [2024-06-03 18:56:33,974 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 52 selfloop transitions, 4 changer transitions 16/78 dead transitions. [2024-06-03 18:56:33,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 78 transitions, 559 flow [2024-06-03 18:56:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 18:56:33,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53515625 [2024-06-03 18:56:33,975 INFO L175 Difference]: Start difference. First operand has 90 places, 62 transitions, 365 flow. Second operand 8 states and 137 transitions. [2024-06-03 18:56:33,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 78 transitions, 559 flow [2024-06-03 18:56:33,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 78 transitions, 541 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 18:56:33,981 INFO L231 Difference]: Finished difference. Result has 89 places, 57 transitions, 327 flow [2024-06-03 18:56:33,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=89, PETRI_TRANSITIONS=57} [2024-06-03 18:56:33,981 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-03 18:56:33,981 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 57 transitions, 327 flow [2024-06-03 18:56:33,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:33,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:33,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:33,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 18:56:33,982 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)] === [2024-06-03 18:56:33,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:33,982 INFO L85 PathProgramCache]: Analyzing trace with hash -522157327, now seen corresponding path program 4 times [2024-06-03 18:56:33,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:33,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499646597] [2024-06-03 18:56:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:33,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:34,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:34,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499646597] [2024-06-03 18:56:34,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499646597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:34,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:34,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:34,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577256893] [2024-06-03 18:56:34,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:34,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:34,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:34,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:34,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:34,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:34,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 57 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:34,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:34,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:34,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:34,165 INFO L124 PetriNetUnfolderBase]: 112/260 cut-off events. [2024-06-03 18:56:34,165 INFO L125 PetriNetUnfolderBase]: For 5260/5260 co-relation queries the response was YES. [2024-06-03 18:56:34,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 260 events. 112/260 cut-off events. For 5260/5260 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1132 event pairs, 22 based on Foata normal form. 8/264 useless extension candidates. Maximal degree in co-relation 928. Up to 131 conditions per place. [2024-06-03 18:56:34,166 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 34 selfloop transitions, 21 changer transitions 9/70 dead transitions. [2024-06-03 18:56:34,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 70 transitions, 497 flow [2024-06-03 18:56:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:34,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 18:56:34,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55859375 [2024-06-03 18:56:34,168 INFO L175 Difference]: Start difference. First operand has 89 places, 57 transitions, 327 flow. Second operand 8 states and 143 transitions. [2024-06-03 18:56:34,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 70 transitions, 497 flow [2024-06-03 18:56:34,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 481 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 18:56:34,173 INFO L231 Difference]: Finished difference. Result has 83 places, 54 transitions, 341 flow [2024-06-03 18:56:34,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=341, PETRI_PLACES=83, PETRI_TRANSITIONS=54} [2024-06-03 18:56:34,173 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-03 18:56:34,173 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 54 transitions, 341 flow [2024-06-03 18:56:34,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:34,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:34,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:34,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 18:56:34,174 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)] === [2024-06-03 18:56:34,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:34,174 INFO L85 PathProgramCache]: Analyzing trace with hash -256917135, now seen corresponding path program 5 times [2024-06-03 18:56:34,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:34,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507874358] [2024-06-03 18:56:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:34,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:34,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:34,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507874358] [2024-06-03 18:56:34,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507874358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:34,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:34,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:34,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787824931] [2024-06-03 18:56:34,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:34,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:34,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:34,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:34,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:34,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 54 transitions, 341 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:34,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:34,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:34,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:34,368 INFO L124 PetriNetUnfolderBase]: 125/295 cut-off events. [2024-06-03 18:56:34,368 INFO L125 PetriNetUnfolderBase]: For 6464/6464 co-relation queries the response was YES. [2024-06-03 18:56:34,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 295 events. 125/295 cut-off events. For 6464/6464 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1327 event pairs, 30 based on Foata normal form. 6/297 useless extension candidates. Maximal degree in co-relation 1214. Up to 117 conditions per place. [2024-06-03 18:56:34,369 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 39 selfloop transitions, 19 changer transitions 7/71 dead transitions. [2024-06-03 18:56:34,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 71 transitions, 573 flow [2024-06-03 18:56:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 18:56:34,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56640625 [2024-06-03 18:56:34,370 INFO L175 Difference]: Start difference. First operand has 83 places, 54 transitions, 341 flow. Second operand 8 states and 145 transitions. [2024-06-03 18:56:34,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 71 transitions, 573 flow [2024-06-03 18:56:34,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 71 transitions, 523 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 18:56:34,378 INFO L231 Difference]: Finished difference. Result has 81 places, 51 transitions, 318 flow [2024-06-03 18:56:34,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=318, PETRI_PLACES=81, PETRI_TRANSITIONS=51} [2024-06-03 18:56:34,378 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-03 18:56:34,378 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 51 transitions, 318 flow [2024-06-03 18:56:34,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:34,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:34,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:34,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 18:56:34,379 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)] === [2024-06-03 18:56:34,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:34,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1854556783, now seen corresponding path program 1 times [2024-06-03 18:56:34,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:34,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833768796] [2024-06-03 18:56:34,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:34,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:34,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:34,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833768796] [2024-06-03 18:56:34,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833768796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:34,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:34,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:34,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492937170] [2024-06-03 18:56:34,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:34,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:34,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:34,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:34,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:34,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:34,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 51 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:34,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:34,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:34,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:34,597 INFO L124 PetriNetUnfolderBase]: 100/238 cut-off events. [2024-06-03 18:56:34,597 INFO L125 PetriNetUnfolderBase]: For 4391/4391 co-relation queries the response was YES. [2024-06-03 18:56:34,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 238 events. 100/238 cut-off events. For 4391/4391 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 973 event pairs, 22 based on Foata normal form. 8/242 useless extension candidates. Maximal degree in co-relation 864. Up to 117 conditions per place. [2024-06-03 18:56:34,598 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 32 selfloop transitions, 17 changer transitions 9/64 dead transitions. [2024-06-03 18:56:34,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 64 transitions, 474 flow [2024-06-03 18:56:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 18:56:34,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-03 18:56:34,599 INFO L175 Difference]: Start difference. First operand has 81 places, 51 transitions, 318 flow. Second operand 8 states and 140 transitions. [2024-06-03 18:56:34,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 64 transitions, 474 flow [2024-06-03 18:56:34,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 64 transitions, 432 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 18:56:34,605 INFO L231 Difference]: Finished difference. Result has 78 places, 48 transitions, 294 flow [2024-06-03 18:56:34,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=294, PETRI_PLACES=78, PETRI_TRANSITIONS=48} [2024-06-03 18:56:34,605 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2024-06-03 18:56:34,605 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 48 transitions, 294 flow [2024-06-03 18:56:34,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:34,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:34,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:34,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 18:56:34,606 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)] === [2024-06-03 18:56:34,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:34,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1863127663, now seen corresponding path program 2 times [2024-06-03 18:56:34,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:34,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672059067] [2024-06-03 18:56:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:34,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:34,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:34,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672059067] [2024-06-03 18:56:34,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672059067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:34,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:34,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:34,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639590427] [2024-06-03 18:56:34,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:34,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:34,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:34,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:34,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:34,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 48 transitions, 294 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:34,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:34,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:34,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:34,835 INFO L124 PetriNetUnfolderBase]: 91/221 cut-off events. [2024-06-03 18:56:34,836 INFO L125 PetriNetUnfolderBase]: For 3232/3232 co-relation queries the response was YES. [2024-06-03 18:56:34,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 221 events. 91/221 cut-off events. For 3232/3232 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 877 event pairs, 16 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 788. Up to 107 conditions per place. [2024-06-03 18:56:34,837 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 26 selfloop transitions, 13 changer transitions 16/61 dead transitions. [2024-06-03 18:56:34,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 61 transitions, 438 flow [2024-06-03 18:56:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 18:56:34,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390625 [2024-06-03 18:56:34,838 INFO L175 Difference]: Start difference. First operand has 78 places, 48 transitions, 294 flow. Second operand 8 states and 138 transitions. [2024-06-03 18:56:34,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 61 transitions, 438 flow [2024-06-03 18:56:34,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 61 transitions, 400 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 18:56:34,843 INFO L231 Difference]: Finished difference. Result has 75 places, 43 transitions, 255 flow [2024-06-03 18:56:34,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=255, PETRI_PLACES=75, PETRI_TRANSITIONS=43} [2024-06-03 18:56:34,843 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-03 18:56:34,843 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 43 transitions, 255 flow [2024-06-03 18:56:34,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:34,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:34,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:34,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 18:56:34,844 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)] === [2024-06-03 18:56:34,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:34,844 INFO L85 PathProgramCache]: Analyzing trace with hash -99344495, now seen corresponding path program 3 times [2024-06-03 18:56:34,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:34,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807069335] [2024-06-03 18:56:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:34,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:34,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:34,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807069335] [2024-06-03 18:56:34,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807069335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:34,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:34,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:34,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590141786] [2024-06-03 18:56:34,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:34,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:34,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:34,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:34,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:34,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 43 transitions, 255 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:34,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:34,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:34,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:35,030 INFO L124 PetriNetUnfolderBase]: 83/197 cut-off events. [2024-06-03 18:56:35,030 INFO L125 PetriNetUnfolderBase]: For 3304/3304 co-relation queries the response was YES. [2024-06-03 18:56:35,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 197 events. 83/197 cut-off events. For 3304/3304 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 750 event pairs, 20 based on Foata normal form. 8/204 useless extension candidates. Maximal degree in co-relation 710. Up to 103 conditions per place. [2024-06-03 18:56:35,031 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 24 selfloop transitions, 14 changer transitions 9/53 dead transitions. [2024-06-03 18:56:35,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 53 transitions, 381 flow [2024-06-03 18:56:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:35,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 18:56:35,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-03 18:56:35,032 INFO L175 Difference]: Start difference. First operand has 75 places, 43 transitions, 255 flow. Second operand 8 states and 136 transitions. [2024-06-03 18:56:35,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 53 transitions, 381 flow [2024-06-03 18:56:35,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 53 transitions, 339 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-03 18:56:35,035 INFO L231 Difference]: Finished difference. Result has 66 places, 40 transitions, 229 flow [2024-06-03 18:56:35,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=229, PETRI_PLACES=66, PETRI_TRANSITIONS=40} [2024-06-03 18:56:35,036 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 35 predicate places. [2024-06-03 18:56:35,036 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 40 transitions, 229 flow [2024-06-03 18:56:35,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:35,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:35,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:35,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 18:56:35,036 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)] === [2024-06-03 18:56:35,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:35,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1246284399, now seen corresponding path program 4 times [2024-06-03 18:56:35,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:35,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602411817] [2024-06-03 18:56:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:35,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:35,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:35,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602411817] [2024-06-03 18:56:35,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602411817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:35,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:35,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:35,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952200746] [2024-06-03 18:56:35,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:35,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:35,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:35,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:35,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:35,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:35,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 40 transitions, 229 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:35,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:35,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:35,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:35,249 INFO L124 PetriNetUnfolderBase]: 96/232 cut-off events. [2024-06-03 18:56:35,250 INFO L125 PetriNetUnfolderBase]: For 2974/2974 co-relation queries the response was YES. [2024-06-03 18:56:35,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 232 events. 96/232 cut-off events. For 2974/2974 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 980 event pairs, 30 based on Foata normal form. 6/237 useless extension candidates. Maximal degree in co-relation 870. Up to 89 conditions per place. [2024-06-03 18:56:35,251 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 29 selfloop transitions, 12 changer transitions 7/54 dead transitions. [2024-06-03 18:56:35,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 54 transitions, 399 flow [2024-06-03 18:56:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:35,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 18:56:35,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390625 [2024-06-03 18:56:35,252 INFO L175 Difference]: Start difference. First operand has 66 places, 40 transitions, 229 flow. Second operand 8 states and 138 transitions. [2024-06-03 18:56:35,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 54 transitions, 399 flow [2024-06-03 18:56:35,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 54 transitions, 363 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 18:56:35,255 INFO L231 Difference]: Finished difference. Result has 64 places, 37 transitions, 206 flow [2024-06-03 18:56:35,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=206, PETRI_PLACES=64, PETRI_TRANSITIONS=37} [2024-06-03 18:56:35,256 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-06-03 18:56:35,256 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 37 transitions, 206 flow [2024-06-03 18:56:35,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:35,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:35,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:35,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 18:56:35,256 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)] === [2024-06-03 18:56:35,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:35,257 INFO L85 PathProgramCache]: Analyzing trace with hash -873575825, now seen corresponding path program 5 times [2024-06-03 18:56:35,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:35,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372202481] [2024-06-03 18:56:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:35,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:35,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:35,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372202481] [2024-06-03 18:56:35,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372202481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:35,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:35,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:35,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528579345] [2024-06-03 18:56:35,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:35,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:35,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:35,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:35,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:35,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:35,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 37 transitions, 206 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:35,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:35,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:35,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:35,435 INFO L124 PetriNetUnfolderBase]: 71/175 cut-off events. [2024-06-03 18:56:35,435 INFO L125 PetriNetUnfolderBase]: For 1943/1943 co-relation queries the response was YES. [2024-06-03 18:56:35,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 175 events. 71/175 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. 8/182 useless extension candidates. Maximal degree in co-relation 590. Up to 89 conditions per place. [2024-06-03 18:56:35,436 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 21 selfloop transitions, 11 changer transitions 9/47 dead transitions. [2024-06-03 18:56:35,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 47 transitions, 318 flow [2024-06-03 18:56:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:35,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 18:56:35,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-06-03 18:56:35,437 INFO L175 Difference]: Start difference. First operand has 64 places, 37 transitions, 206 flow. Second operand 8 states and 134 transitions. [2024-06-03 18:56:35,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 47 transitions, 318 flow [2024-06-03 18:56:35,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 47 transitions, 290 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 18:56:35,439 INFO L231 Difference]: Finished difference. Result has 61 places, 34 transitions, 184 flow [2024-06-03 18:56:35,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=61, PETRI_TRANSITIONS=34} [2024-06-03 18:56:35,440 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 30 predicate places. [2024-06-03 18:56:35,440 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 34 transitions, 184 flow [2024-06-03 18:56:35,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:35,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:35,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:35,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 18:56:35,440 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)] === [2024-06-03 18:56:35,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:35,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1669501621, now seen corresponding path program 6 times [2024-06-03 18:56:35,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:35,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484447112] [2024-06-03 18:56:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:35,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:35,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:35,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484447112] [2024-06-03 18:56:35,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484447112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:35,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:35,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:35,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241134501] [2024-06-03 18:56:35,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:35,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:35,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:35,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:35,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:35,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 34 transitions, 184 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:35,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:35,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:35,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:35,625 INFO L124 PetriNetUnfolderBase]: 77/193 cut-off events. [2024-06-03 18:56:35,625 INFO L125 PetriNetUnfolderBase]: For 1809/1809 co-relation queries the response was YES. [2024-06-03 18:56:35,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 193 events. 77/193 cut-off events. For 1809/1809 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 733 event pairs, 27 based on Foata normal form. 6/198 useless extension candidates. Maximal degree in co-relation 678. Up to 62 conditions per place. [2024-06-03 18:56:35,626 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 25 selfloop transitions, 8 changer transitions 8/47 dead transitions. [2024-06-03 18:56:35,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 47 transitions, 328 flow [2024-06-03 18:56:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 18:56:35,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-06-03 18:56:35,627 INFO L175 Difference]: Start difference. First operand has 61 places, 34 transitions, 184 flow. Second operand 8 states and 134 transitions. [2024-06-03 18:56:35,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 47 transitions, 328 flow [2024-06-03 18:56:35,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 298 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 18:56:35,629 INFO L231 Difference]: Finished difference. Result has 58 places, 30 transitions, 153 flow [2024-06-03 18:56:35,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=153, PETRI_PLACES=58, PETRI_TRANSITIONS=30} [2024-06-03 18:56:35,629 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 27 predicate places. [2024-06-03 18:56:35,630 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 30 transitions, 153 flow [2024-06-03 18:56:35,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:35,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:35,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:35,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 18:56:35,630 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)] === [2024-06-03 18:56:35,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:35,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1009226351, now seen corresponding path program 6 times [2024-06-03 18:56:35,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:35,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475201432] [2024-06-03 18:56:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:35,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:35,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:35,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475201432] [2024-06-03 18:56:35,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475201432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:35,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:35,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:35,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025677009] [2024-06-03 18:56:35,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:35,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:35,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:35,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:35,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:35,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 30 transitions, 153 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:35,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:35,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:35,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:35,817 INFO L124 PetriNetUnfolderBase]: 69/173 cut-off events. [2024-06-03 18:56:35,817 INFO L125 PetriNetUnfolderBase]: For 1532/1532 co-relation queries the response was YES. [2024-06-03 18:56:35,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 173 events. 69/173 cut-off events. For 1532/1532 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 625 event pairs, 27 based on Foata normal form. 6/178 useless extension candidates. Maximal degree in co-relation 600. Up to 56 conditions per place. [2024-06-03 18:56:35,818 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 24 selfloop transitions, 7 changer transitions 6/43 dead transitions. [2024-06-03 18:56:35,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 43 transitions, 285 flow [2024-06-03 18:56:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 18:56:35,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51953125 [2024-06-03 18:56:35,819 INFO L175 Difference]: Start difference. First operand has 58 places, 30 transitions, 153 flow. Second operand 8 states and 133 transitions. [2024-06-03 18:56:35,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 43 transitions, 285 flow [2024-06-03 18:56:35,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 43 transitions, 253 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-03 18:56:35,820 INFO L231 Difference]: Finished difference. Result has 52 places, 28 transitions, 134 flow [2024-06-03 18:56:35,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=134, PETRI_PLACES=52, PETRI_TRANSITIONS=28} [2024-06-03 18:56:35,821 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-06-03 18:56:35,821 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 28 transitions, 134 flow [2024-06-03 18:56:35,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:35,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:35,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:35,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 18:56:35,821 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)] === [2024-06-03 18:56:35,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1000655471, now seen corresponding path program 7 times [2024-06-03 18:56:35,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:35,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470143519] [2024-06-03 18:56:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:35,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:35,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470143519] [2024-06-03 18:56:35,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470143519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:35,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:35,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:35,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801574683] [2024-06-03 18:56:35,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:35,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:35,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:35,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:35,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:35,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:35,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 28 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:35,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:35,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:35,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:36,049 INFO L124 PetriNetUnfolderBase]: 45/121 cut-off events. [2024-06-03 18:56:36,049 INFO L125 PetriNetUnfolderBase]: For 655/655 co-relation queries the response was YES. [2024-06-03 18:56:36,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 121 events. 45/121 cut-off events. For 655/655 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 359 event pairs, 19 based on Foata normal form. 8/128 useless extension candidates. Maximal degree in co-relation 358. Up to 52 conditions per place. [2024-06-03 18:56:36,050 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 16 selfloop transitions, 4 changer transitions 11/37 dead transitions. [2024-06-03 18:56:36,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 37 transitions, 218 flow [2024-06-03 18:56:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 18:56:36,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 18:56:36,051 INFO L175 Difference]: Start difference. First operand has 52 places, 28 transitions, 134 flow. Second operand 8 states and 128 transitions. [2024-06-03 18:56:36,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 37 transitions, 218 flow [2024-06-03 18:56:36,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 37 transitions, 200 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 18:56:36,052 INFO L231 Difference]: Finished difference. Result has 51 places, 23 transitions, 94 flow [2024-06-03 18:56:36,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=94, PETRI_PLACES=51, PETRI_TRANSITIONS=23} [2024-06-03 18:56:36,053 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-06-03 18:56:36,053 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 23 transitions, 94 flow [2024-06-03 18:56:36,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:36,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:36,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:56:36,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 18:56:36,053 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)] === [2024-06-03 18:56:36,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1808700817, now seen corresponding path program 8 times [2024-06-03 18:56:36,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:36,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013761533] [2024-06-03 18:56:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:36,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:36,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:36,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013761533] [2024-06-03 18:56:36,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013761533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:36,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:36,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:36,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044709311] [2024-06-03 18:56:36,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:36,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:36,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:36,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:36,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:36,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 18:56:36,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 23 transitions, 94 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:36,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:36,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 18:56:36,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:36,278 INFO L124 PetriNetUnfolderBase]: 20/66 cut-off events. [2024-06-03 18:56:36,279 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-06-03 18:56:36,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 66 events. 20/66 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. 6/71 useless extension candidates. Maximal degree in co-relation 159. Up to 24 conditions per place. [2024-06-03 18:56:36,279 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2024-06-03 18:56:36,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 29 transitions, 136 flow [2024-06-03 18:56:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:56:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:56:36,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-03 18:56:36,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-03 18:56:36,280 INFO L175 Difference]: Start difference. First operand has 51 places, 23 transitions, 94 flow. Second operand 8 states and 120 transitions. [2024-06-03 18:56:36,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 29 transitions, 136 flow [2024-06-03 18:56:36,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 29 transitions, 110 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-03 18:56:36,281 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2024-06-03 18:56:36,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2024-06-03 18:56:36,281 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-06-03 18:56:36,282 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2024-06-03 18:56:36,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:36,284 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-03 18:56:36,284 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-03 18:56:36,284 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-03 18:56:36,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-03 18:56:36,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 18:56:36,285 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 6, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2024-06-03 18:56:36,287 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-03 18:56:36,287 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-03 18:56:36,290 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-03 18:56:36,290 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-03 18:56:36,291 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.06 06:56:36 BasicIcfg [2024-06-03 18:56:36,291 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-03 18:56:36,291 INFO L158 Benchmark]: Toolchain (without parser) took 9860.31ms. Allocated memory was 182.5MB in the beginning and 478.2MB in the end (delta: 295.7MB). Free memory was 151.2MB in the beginning and 351.4MB in the end (delta: -200.1MB). Peak memory consumption was 96.1MB. Max. memory is 16.1GB. [2024-06-03 18:56:36,292 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 110.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:56:36,293 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 142.6MB. Free memory is still 70.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:56:36,293 INFO L158 Benchmark]: CACSL2BoogieTranslator took 504.83ms. Allocated memory is still 182.5MB. Free memory was 151.0MB in the beginning and 128.6MB in the end (delta: 22.4MB). Peak memory consumption was 27.4MB. Max. memory is 16.1GB. [2024-06-03 18:56:36,293 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.35ms. Allocated memory is still 182.5MB. Free memory was 128.6MB in the beginning and 126.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 18:56:36,293 INFO L158 Benchmark]: Boogie Preprocessor took 61.00ms. Allocated memory is still 182.5MB. Free memory was 126.6MB in the beginning and 124.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 18:56:36,293 INFO L158 Benchmark]: RCFGBuilder took 482.81ms. Allocated memory is still 182.5MB. Free memory was 124.5MB in the beginning and 103.6MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-03 18:56:36,294 INFO L158 Benchmark]: TraceAbstraction took 8750.02ms. Allocated memory was 182.5MB in the beginning and 478.2MB in the end (delta: 295.7MB). Free memory was 102.7MB in the beginning and 351.4MB in the end (delta: -248.7MB). Peak memory consumption was 47.7MB. Max. memory is 16.1GB. [2024-06-03 18:56:36,295 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 110.9MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.16ms. Allocated memory is still 142.6MB. Free memory is still 70.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 504.83ms. Allocated memory is still 182.5MB. Free memory was 151.0MB in the beginning and 128.6MB in the end (delta: 22.4MB). Peak memory consumption was 27.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.35ms. Allocated memory is still 182.5MB. Free memory was 128.6MB in the beginning and 126.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.00ms. Allocated memory is still 182.5MB. Free memory was 126.6MB in the beginning and 124.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 482.81ms. Allocated memory is still 182.5MB. Free memory was 124.5MB in the beginning and 103.6MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 8750.02ms. Allocated memory was 182.5MB in the beginning and 478.2MB in the end (delta: 295.7MB). Free memory was 102.7MB in the beginning and 351.4MB in the end (delta: -248.7MB). Peak memory consumption was 47.7MB. 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, 51 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: 8.7s, OverallIterations: 41, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1754 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1252 mSDsluCounter, 387 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 241 mSDsCounter, 201 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6074 IncrementalHoareTripleChecker+Invalid, 6275 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 201 mSolverCounterUnsat, 146 mSDtfsCounter, 6074 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, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=490occurred 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, 3.9s InterpolantComputationTime, 672 NumberOfCodeBlocks, 672 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 631 ConstructedInterpolants, 0 QuantifiedInterpolants, 5831 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! [2024-06-03 18:56:36,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE