./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe036.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe036.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe036.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/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-7724a2d-m [2024-06-27 23:01:51,027 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:01:51,087 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:01:51,090 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:01:51,090 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:01:51,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:01:51,104 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:01:51,105 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:01:51,106 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:01:51,109 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:01:51,109 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:01:51,109 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:01:51,110 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:01:51,111 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:01:51,111 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:01:51,112 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:01:51,112 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:01:51,112 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:01:51,112 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:01:51,113 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:01:51,114 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:01:51,114 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:01:51,114 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:01:51,114 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:01:51,115 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:01:51,115 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:01:51,115 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:01:51,115 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:01:51,116 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:01:51,116 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:01:51,117 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:01:51,117 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:01:51,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:01:51,117 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:01:51,117 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:01:51,118 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:01:51,118 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:01:51,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:01:51,119 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:01:51,119 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:01:51,119 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:01:51,119 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:01:51,119 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:01:51,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:01:51,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:01:51,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:01:51,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:01:51,348 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:01:51,348 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:01:51,349 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-27 23:01:52,308 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:01:52,571 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:01:52,571 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-27 23:01:52,589 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66663f621/4296ba8c4d9f4dcc8f141f0ce841dfb9/FLAG8c5a5ee3f [2024-06-27 23:01:52,599 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66663f621/4296ba8c4d9f4dcc8f141f0ce841dfb9 [2024-06-27 23:01:52,605 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:01:52,605 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:01:52,608 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe036.yml/witness.yml [2024-06-27 23:01:52,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:01:52,690 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:01:52,691 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:01:52,691 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:01:52,695 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:01:52,696 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:01:52" (1/2) ... [2024-06-27 23:01:52,696 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e14fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:01:52, skipping insertion in model container [2024-06-27 23:01:52,697 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:01:52" (1/2) ... [2024-06-27 23:01:52,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3987ec93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:01:52, skipping insertion in model container [2024-06-27 23:01:52,698 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:01:52" (2/2) ... [2024-06-27 23:01:52,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e14fd5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:52, skipping insertion in model container [2024-06-27 23:01:52,700 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:01:52" (2/2) ... [2024-06-27 23:01:52,700 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:01:52,719 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:01:52,721 INFO L97 edCorrectnessWitness]: Location invariant before [L768-L768] ! multithreaded || (((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) [2024-06-27 23:01:52,721 INFO L97 edCorrectnessWitness]: Location invariant before [L767-L767] ! multithreaded || (((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) [2024-06-27 23:01:52,721 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:01:52,721 INFO L106 edCorrectnessWitness]: ghost_update [L765-L765] multithreaded = 1; [2024-06-27 23:01:52,762 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:01:53,067 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:01:53,076 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:01:53,139 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:01:53,168 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:01:53,169 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53 WrapperNode [2024-06-27 23:01:53,169 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:01:53,170 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:01:53,170 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:01:53,170 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:01:53,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (1/1) ... [2024-06-27 23:01:53,185 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (1/1) ... [2024-06-27 23:01:53,199 INFO L138 Inliner]: procedures = 174, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 57 [2024-06-27 23:01:53,199 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:01:53,200 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:01:53,200 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:01:53,200 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:01:53,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (1/1) ... [2024-06-27 23:01:53,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (1/1) ... [2024-06-27 23:01:53,209 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (1/1) ... [2024-06-27 23:01:53,218 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]. [2024-06-27 23:01:53,218 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (1/1) ... [2024-06-27 23:01:53,219 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (1/1) ... [2024-06-27 23:01:53,222 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (1/1) ... [2024-06-27 23:01:53,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (1/1) ... [2024-06-27 23:01:53,224 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (1/1) ... [2024-06-27 23:01:53,225 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (1/1) ... [2024-06-27 23:01:53,226 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:01:53,227 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:01:53,227 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:01:53,227 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:01:53,227 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (1/1) ... [2024-06-27 23:01:53,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:01:53,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:01:53,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 23:01:53,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 23:01:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:01:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:01:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:01:53,304 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:01:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:01:53,304 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:01:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:01:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:01:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:01:53,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:01:53,305 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:01:53,423 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:01:53,424 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:01:53,604 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:01:53,605 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:01:53,669 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:01:53,669 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:01:53,670 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:01:53 BoogieIcfgContainer [2024-06-27 23:01:53,670 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:01:53,671 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:01:53,671 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:01:53,680 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:01:53,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:01:52" (1/4) ... [2024-06-27 23:01:53,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e976228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:01:53, skipping insertion in model container [2024-06-27 23:01:53,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:01:52" (2/4) ... [2024-06-27 23:01:53,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e976228 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:01:53, skipping insertion in model container [2024-06-27 23:01:53,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:01:53" (3/4) ... [2024-06-27 23:01:53,683 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e976228 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:01:53, skipping insertion in model container [2024-06-27 23:01:53,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:01:53" (4/4) ... [2024-06-27 23:01:53,683 INFO L112 eAbstractionObserver]: Analyzing ICFG safe036.i [2024-06-27 23:01:53,698 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:01:53,699 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 23:01:53,699 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:01:53,746 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:01:53,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-27 23:01:53,788 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-27 23:01:53,788 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:01:53,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:01:53,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-27 23:01:53,791 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-27 23:01:53,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:01:53,802 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;@709c2017, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:01:53,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 23:01:53,805 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:01:53,805 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 23:01:53,805 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:01:53,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:53,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:01:53,806 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)] === [2024-06-27 23:01:53,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:53,821 INFO L85 PathProgramCache]: Analyzing trace with hash 191623985, now seen corresponding path program 1 times [2024-06-27 23:01:53,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:53,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115455652] [2024-06-27 23:01:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:53,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:54,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:54,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115455652] [2024-06-27 23:01:54,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115455652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:54,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:54,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:01:54,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230118335] [2024-06-27 23:01:54,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:54,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:01:54,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:01:54,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:01:54,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 31 [2024-06-27 23:01:54,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:54,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:54,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 31 [2024-06-27 23:01:54,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:54,530 INFO L124 PetriNetUnfolderBase]: 66/165 cut-off events. [2024-06-27 23:01:54,531 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 23:01:54,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 165 events. 66/165 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 651 event pairs, 33 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 297. Up to 124 conditions per place. [2024-06-27 23:01:54,534 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 17 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-27 23:01:54,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 107 flow [2024-06-27 23:01:54,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:01:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:01:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-06-27 23:01:54,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7204301075268817 [2024-06-27 23:01:54,545 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 67 transitions. [2024-06-27 23:01:54,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 107 flow [2024-06-27 23:01:54,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 104 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 23:01:54,548 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-27 23:01:54,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-27 23:01:54,552 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-27 23:01:54,553 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-27 23:01:54,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:54,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:54,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:54,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:01:54,554 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)] === [2024-06-27 23:01:54,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash -532916464, now seen corresponding path program 1 times [2024-06-27 23:01:54,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:54,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177478485] [2024-06-27 23:01:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:54,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:54,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:54,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177478485] [2024-06-27 23:01:54,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177478485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:54,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:54,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:01:54,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070554834] [2024-06-27 23:01:54,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:54,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:01:54,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:54,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:01:54,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:01:54,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-06-27 23:01:54,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:54,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:54,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-06-27 23:01:54,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:54,742 INFO L124 PetriNetUnfolderBase]: 80/182 cut-off events. [2024-06-27 23:01:54,746 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-06-27 23:01:54,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 182 events. 80/182 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 718 event pairs, 34 based on Foata normal form. 2/177 useless extension candidates. Maximal degree in co-relation 392. Up to 139 conditions per place. [2024-06-27 23:01:54,748 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 22 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-27 23:01:54,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 151 flow [2024-06-27 23:01:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:01:54,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:01:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-06-27 23:01:54,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6854838709677419 [2024-06-27 23:01:54,751 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 85 transitions. [2024-06-27 23:01:54,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 151 flow [2024-06-27 23:01:54,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:01:54,755 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-27 23:01:54,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-27 23:01:54,756 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-27 23:01:54,756 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-27 23:01:54,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:54,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:54,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:54,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:01:54,757 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)] === [2024-06-27 23:01:54,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1765335485, now seen corresponding path program 1 times [2024-06-27 23:01:54,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:54,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381077822] [2024-06-27 23:01:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:54,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:54,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:54,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381077822] [2024-06-27 23:01:54,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381077822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:54,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:54,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:01:54,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309324715] [2024-06-27 23:01:54,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:54,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:01:54,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:54,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:01:54,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:01:54,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-06-27 23:01:54,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:54,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:54,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-06-27 23:01:54,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:55,026 INFO L124 PetriNetUnfolderBase]: 79/184 cut-off events. [2024-06-27 23:01:55,027 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-06-27 23:01:55,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 184 events. 79/184 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 704 event pairs, 34 based on Foata normal form. 1/176 useless extension candidates. Maximal degree in co-relation 443. Up to 145 conditions per place. [2024-06-27 23:01:55,028 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 21 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2024-06-27 23:01:55,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 165 flow [2024-06-27 23:01:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:01:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:01:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-06-27 23:01:55,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6532258064516129 [2024-06-27 23:01:55,029 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 4 states and 81 transitions. [2024-06-27 23:01:55,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 165 flow [2024-06-27 23:01:55,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 156 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 23:01:55,031 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 111 flow [2024-06-27 23:01:55,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-06-27 23:01:55,031 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-06-27 23:01:55,031 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 111 flow [2024-06-27 23:01:55,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:55,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:55,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:55,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:01:55,032 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)] === [2024-06-27 23:01:55,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:55,032 INFO L85 PathProgramCache]: Analyzing trace with hash 766802660, now seen corresponding path program 1 times [2024-06-27 23:01:55,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:55,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943092109] [2024-06-27 23:01:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:55,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:55,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:55,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943092109] [2024-06-27 23:01:55,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943092109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:55,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:55,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:01:55,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786051800] [2024-06-27 23:01:55,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:55,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:01:55,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:55,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:01:55,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:01:55,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:55,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 111 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:55,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:55,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:55,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:55,269 INFO L124 PetriNetUnfolderBase]: 95/212 cut-off events. [2024-06-27 23:01:55,270 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-06-27 23:01:55,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 212 events. 95/212 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 796 event pairs, 13 based on Foata normal form. 4/214 useless extension candidates. Maximal degree in co-relation 538. Up to 138 conditions per place. [2024-06-27 23:01:55,274 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 29 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-27 23:01:55,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 44 transitions, 219 flow [2024-06-27 23:01:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 23:01:55,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182795698924731 [2024-06-27 23:01:55,278 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 111 flow. Second operand 6 states and 115 transitions. [2024-06-27 23:01:55,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 44 transitions, 219 flow [2024-06-27 23:01:55,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 210 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 23:01:55,280 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 127 flow [2024-06-27 23:01:55,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2024-06-27 23:01:55,281 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-27 23:01:55,282 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 127 flow [2024-06-27 23:01:55,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:55,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:55,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:55,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:01:55,283 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)] === [2024-06-27 23:01:55,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:55,283 INFO L85 PathProgramCache]: Analyzing trace with hash -515630260, now seen corresponding path program 1 times [2024-06-27 23:01:55,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:55,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155219294] [2024-06-27 23:01:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:55,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:55,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:55,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155219294] [2024-06-27 23:01:55,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155219294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:55,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:55,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:01:55,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934182728] [2024-06-27 23:01:55,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:55,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:01:55,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:55,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:01:55,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:01:55,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:55,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:55,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:55,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:55,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:55,488 INFO L124 PetriNetUnfolderBase]: 98/218 cut-off events. [2024-06-27 23:01:55,488 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-27 23:01:55,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 218 events. 98/218 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 835 event pairs, 25 based on Foata normal form. 1/216 useless extension candidates. Maximal degree in co-relation 602. Up to 160 conditions per place. [2024-06-27 23:01:55,489 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 29 selfloop transitions, 10 changer transitions 0/46 dead transitions. [2024-06-27 23:01:55,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 255 flow [2024-06-27 23:01:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:01:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:01:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-27 23:01:55,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6387096774193548 [2024-06-27 23:01:55,491 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 127 flow. Second operand 5 states and 99 transitions. [2024-06-27 23:01:55,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 255 flow [2024-06-27 23:01:55,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 46 transitions, 239 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 23:01:55,493 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 164 flow [2024-06-27 23:01:55,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 23:01:55,494 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-27 23:01:55,494 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 164 flow [2024-06-27 23:01:55,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:55,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:55,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:55,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:01:55,495 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)] === [2024-06-27 23:01:55,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:55,495 INFO L85 PathProgramCache]: Analyzing trace with hash 348203314, now seen corresponding path program 2 times [2024-06-27 23:01:55,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:55,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704815292] [2024-06-27 23:01:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:55,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:55,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:55,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704815292] [2024-06-27 23:01:55,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704815292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:55,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:55,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:01:55,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950545036] [2024-06-27 23:01:55,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:55,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:01:55,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:55,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:01:55,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:01:55,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:55,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:55,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:55,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:55,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:55,694 INFO L124 PetriNetUnfolderBase]: 96/213 cut-off events. [2024-06-27 23:01:55,694 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2024-06-27 23:01:55,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 213 events. 96/213 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 809 event pairs, 28 based on Foata normal form. 1/210 useless extension candidates. Maximal degree in co-relation 640. Up to 158 conditions per place. [2024-06-27 23:01:55,696 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 25 selfloop transitions, 10 changer transitions 0/42 dead transitions. [2024-06-27 23:01:55,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 248 flow [2024-06-27 23:01:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:01:55,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:01:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-27 23:01:55,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6129032258064516 [2024-06-27 23:01:55,697 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 164 flow. Second operand 5 states and 95 transitions. [2024-06-27 23:01:55,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 248 flow [2024-06-27 23:01:55,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 244 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 23:01:55,700 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 185 flow [2024-06-27 23:01:55,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2024-06-27 23:01:55,703 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2024-06-27 23:01:55,703 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 185 flow [2024-06-27 23:01:55,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:55,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:55,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:55,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:01:55,704 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)] === [2024-06-27 23:01:55,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:55,704 INFO L85 PathProgramCache]: Analyzing trace with hash 341558557, now seen corresponding path program 1 times [2024-06-27 23:01:55,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:55,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102051552] [2024-06-27 23:01:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:55,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:55,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:55,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102051552] [2024-06-27 23:01:55,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102051552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:55,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:55,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:55,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82733239] [2024-06-27 23:01:55,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:55,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:55,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:55,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:55,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:55,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 31 [2024-06-27 23:01:55,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 185 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:55,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:55,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 31 [2024-06-27 23:01:55,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:55,981 INFO L124 PetriNetUnfolderBase]: 99/223 cut-off events. [2024-06-27 23:01:55,981 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-27 23:01:55,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 223 events. 99/223 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 868 event pairs, 23 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 690. Up to 160 conditions per place. [2024-06-27 23:01:55,983 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 36 selfloop transitions, 9 changer transitions 0/51 dead transitions. [2024-06-27 23:01:55,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 315 flow [2024-06-27 23:01:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:55,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 23:01:55,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2024-06-27 23:01:55,984 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 185 flow. Second operand 6 states and 110 transitions. [2024-06-27 23:01:55,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 315 flow [2024-06-27 23:01:55,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 51 transitions, 293 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:55,987 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 198 flow [2024-06-27 23:01:55,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2024-06-27 23:01:55,989 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2024-06-27 23:01:55,989 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 198 flow [2024-06-27 23:01:55,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:55,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:55,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:55,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:01:55,990 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)] === [2024-06-27 23:01:55,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:55,991 INFO L85 PathProgramCache]: Analyzing trace with hash -39627491, now seen corresponding path program 2 times [2024-06-27 23:01:55,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:55,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690772003] [2024-06-27 23:01:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:55,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:56,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:56,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690772003] [2024-06-27 23:01:56,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690772003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:56,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:56,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:56,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8123151] [2024-06-27 23:01:56,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:56,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:56,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:56,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:56,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:56,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 31 [2024-06-27 23:01:56,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:56,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:56,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 31 [2024-06-27 23:01:56,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:56,240 INFO L124 PetriNetUnfolderBase]: 102/229 cut-off events. [2024-06-27 23:01:56,241 INFO L125 PetriNetUnfolderBase]: For 631/631 co-relation queries the response was YES. [2024-06-27 23:01:56,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 229 events. 102/229 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 897 event pairs, 24 based on Foata normal form. 1/227 useless extension candidates. Maximal degree in co-relation 745. Up to 149 conditions per place. [2024-06-27 23:01:56,242 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 31 selfloop transitions, 16 changer transitions 0/53 dead transitions. [2024-06-27 23:01:56,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 53 transitions, 356 flow [2024-06-27 23:01:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 23:01:56,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6021505376344086 [2024-06-27 23:01:56,243 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 198 flow. Second operand 6 states and 112 transitions. [2024-06-27 23:01:56,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 53 transitions, 356 flow [2024-06-27 23:01:56,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 337 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:56,245 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 244 flow [2024-06-27 23:01:56,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-06-27 23:01:56,246 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2024-06-27 23:01:56,246 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 244 flow [2024-06-27 23:01:56,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:56,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:56,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:56,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:01:56,246 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)] === [2024-06-27 23:01:56,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:56,247 INFO L85 PathProgramCache]: Analyzing trace with hash 940773775, now seen corresponding path program 1 times [2024-06-27 23:01:56,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:56,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860936922] [2024-06-27 23:01:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:56,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:56,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:56,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860936922] [2024-06-27 23:01:56,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860936922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:56,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:56,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:01:56,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597021716] [2024-06-27 23:01:56,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:56,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:01:56,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:56,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:01:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:01:56,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:56,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 244 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:56,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:56,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:56,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:56,418 INFO L124 PetriNetUnfolderBase]: 105/235 cut-off events. [2024-06-27 23:01:56,418 INFO L125 PetriNetUnfolderBase]: For 826/826 co-relation queries the response was YES. [2024-06-27 23:01:56,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 235 events. 105/235 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 930 event pairs, 24 based on Foata normal form. 1/232 useless extension candidates. Maximal degree in co-relation 807. Up to 161 conditions per place. [2024-06-27 23:01:56,420 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 36 selfloop transitions, 14 changer transitions 0/57 dead transitions. [2024-06-27 23:01:56,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 57 transitions, 402 flow [2024-06-27 23:01:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-27 23:01:56,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6290322580645161 [2024-06-27 23:01:56,421 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 244 flow. Second operand 6 states and 117 transitions. [2024-06-27 23:01:56,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 57 transitions, 402 flow [2024-06-27 23:01:56,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 57 transitions, 384 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 23:01:56,423 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 279 flow [2024-06-27 23:01:56,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-06-27 23:01:56,424 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-27 23:01:56,424 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 279 flow [2024-06-27 23:01:56,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:56,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:56,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:56,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:01:56,424 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)] === [2024-06-27 23:01:56,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:56,425 INFO L85 PathProgramCache]: Analyzing trace with hash -550270371, now seen corresponding path program 3 times [2024-06-27 23:01:56,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:56,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478057728] [2024-06-27 23:01:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:56,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:56,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:56,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478057728] [2024-06-27 23:01:56,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478057728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:56,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:56,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:56,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982248738] [2024-06-27 23:01:56,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:56,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:56,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:56,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:56,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 31 [2024-06-27 23:01:56,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:56,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:56,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 31 [2024-06-27 23:01:56,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:56,631 INFO L124 PetriNetUnfolderBase]: 103/228 cut-off events. [2024-06-27 23:01:56,631 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2024-06-27 23:01:56,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 228 events. 103/228 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 905 event pairs, 30 based on Foata normal form. 1/223 useless extension candidates. Maximal degree in co-relation 840. Up to 152 conditions per place. [2024-06-27 23:01:56,633 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 31 selfloop transitions, 16 changer transitions 0/53 dead transitions. [2024-06-27 23:01:56,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 389 flow [2024-06-27 23:01:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 23:01:56,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-27 23:01:56,634 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 279 flow. Second operand 6 states and 108 transitions. [2024-06-27 23:01:56,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 389 flow [2024-06-27 23:01:56,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 53 transitions, 373 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 23:01:56,637 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 300 flow [2024-06-27 23:01:56,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-06-27 23:01:56,637 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2024-06-27 23:01:56,637 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 300 flow [2024-06-27 23:01:56,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:56,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:56,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:56,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:01:56,638 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)] === [2024-06-27 23:01:56,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:56,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2076310427, now seen corresponding path program 2 times [2024-06-27 23:01:56,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:56,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408498913] [2024-06-27 23:01:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:56,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:56,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:56,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408498913] [2024-06-27 23:01:56,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408498913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:56,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:56,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:01:56,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189972315] [2024-06-27 23:01:56,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:56,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:01:56,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:56,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:01:56,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:01:56,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:56,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 300 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:56,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:56,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:56,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:56,789 INFO L124 PetriNetUnfolderBase]: 106/238 cut-off events. [2024-06-27 23:01:56,789 INFO L125 PetriNetUnfolderBase]: For 1180/1180 co-relation queries the response was YES. [2024-06-27 23:01:56,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 238 events. 106/238 cut-off events. For 1180/1180 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 958 event pairs, 26 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 906. Up to 162 conditions per place. [2024-06-27 23:01:56,791 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 33 selfloop transitions, 16 changer transitions 0/56 dead transitions. [2024-06-27 23:01:56,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 56 transitions, 448 flow [2024-06-27 23:01:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 23:01:56,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6129032258064516 [2024-06-27 23:01:56,792 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 300 flow. Second operand 6 states and 114 transitions. [2024-06-27 23:01:56,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 56 transitions, 448 flow [2024-06-27 23:01:56,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 56 transitions, 407 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:56,795 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 308 flow [2024-06-27 23:01:56,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2024-06-27 23:01:56,796 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2024-06-27 23:01:56,796 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 308 flow [2024-06-27 23:01:56,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:56,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:56,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:56,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:01:56,796 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)] === [2024-06-27 23:01:56,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:56,797 INFO L85 PathProgramCache]: Analyzing trace with hash 318965921, now seen corresponding path program 3 times [2024-06-27 23:01:56,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:56,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193775268] [2024-06-27 23:01:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:56,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:56,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193775268] [2024-06-27 23:01:56,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193775268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:56,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:56,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:01:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784662883] [2024-06-27 23:01:56,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:56,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:01:56,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:01:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:01:56,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:56,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:56,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:56,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:56,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:56,976 INFO L124 PetriNetUnfolderBase]: 104/238 cut-off events. [2024-06-27 23:01:56,977 INFO L125 PetriNetUnfolderBase]: For 1234/1234 co-relation queries the response was YES. [2024-06-27 23:01:56,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 238 events. 104/238 cut-off events. For 1234/1234 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 948 event pairs, 22 based on Foata normal form. 1/237 useless extension candidates. Maximal degree in co-relation 899. Up to 181 conditions per place. [2024-06-27 23:01:56,978 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 39 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2024-06-27 23:01:56,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 420 flow [2024-06-27 23:01:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:56,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 23:01:56,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860215053763441 [2024-06-27 23:01:56,979 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 308 flow. Second operand 6 states and 109 transitions. [2024-06-27 23:01:56,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 420 flow [2024-06-27 23:01:56,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 381 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:56,982 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 292 flow [2024-06-27 23:01:56,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2024-06-27 23:01:56,983 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-27 23:01:56,983 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 292 flow [2024-06-27 23:01:56,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:56,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:56,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:56,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:01:56,984 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)] === [2024-06-27 23:01:56,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash 318976833, now seen corresponding path program 1 times [2024-06-27 23:01:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403950637] [2024-06-27 23:01:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:57,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:57,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403950637] [2024-06-27 23:01:57,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403950637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:57,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:57,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:01:57,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483860163] [2024-06-27 23:01:57,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:57,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:01:57,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:01:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:01:57,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:57,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 292 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:57,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:57,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:57,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:57,148 INFO L124 PetriNetUnfolderBase]: 101/233 cut-off events. [2024-06-27 23:01:57,148 INFO L125 PetriNetUnfolderBase]: For 1320/1320 co-relation queries the response was YES. [2024-06-27 23:01:57,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 233 events. 101/233 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 935 event pairs, 21 based on Foata normal form. 2/233 useless extension candidates. Maximal degree in co-relation 857. Up to 173 conditions per place. [2024-06-27 23:01:57,150 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 41 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-27 23:01:57,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 56 transitions, 408 flow [2024-06-27 23:01:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 23:01:57,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-27 23:01:57,150 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 292 flow. Second operand 6 states and 108 transitions. [2024-06-27 23:01:57,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 56 transitions, 408 flow [2024-06-27 23:01:57,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 371 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:57,154 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 275 flow [2024-06-27 23:01:57,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2024-06-27 23:01:57,154 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-06-27 23:01:57,154 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 275 flow [2024-06-27 23:01:57,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:57,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:57,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:57,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:01:57,155 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)] === [2024-06-27 23:01:57,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:57,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1789753926, now seen corresponding path program 1 times [2024-06-27 23:01:57,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:57,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979142962] [2024-06-27 23:01:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:57,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:57,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:57,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979142962] [2024-06-27 23:01:57,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979142962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:57,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:57,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:57,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096927253] [2024-06-27 23:01:57,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:57,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:57,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:57,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:57,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:57,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:57,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 275 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:57,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:57,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:57,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:57,386 INFO L124 PetriNetUnfolderBase]: 112/254 cut-off events. [2024-06-27 23:01:57,386 INFO L125 PetriNetUnfolderBase]: For 1668/1668 co-relation queries the response was YES. [2024-06-27 23:01:57,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 254 events. 112/254 cut-off events. For 1668/1668 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1041 event pairs, 9 based on Foata normal form. 2/254 useless extension candidates. Maximal degree in co-relation 955. Up to 150 conditions per place. [2024-06-27 23:01:57,388 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 49 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-27 23:01:57,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 68 transitions, 481 flow [2024-06-27 23:01:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 23:01:57,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5967741935483871 [2024-06-27 23:01:57,389 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 275 flow. Second operand 8 states and 148 transitions. [2024-06-27 23:01:57,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 68 transitions, 481 flow [2024-06-27 23:01:57,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 463 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:57,393 INFO L231 Difference]: Finished difference. Result has 66 places, 50 transitions, 303 flow [2024-06-27 23:01:57,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=66, PETRI_TRANSITIONS=50} [2024-06-27 23:01:57,393 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2024-06-27 23:01:57,393 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 50 transitions, 303 flow [2024-06-27 23:01:57,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:57,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:57,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:57,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:01:57,394 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)] === [2024-06-27 23:01:57,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash 457425370, now seen corresponding path program 2 times [2024-06-27 23:01:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930060047] [2024-06-27 23:01:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:57,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:57,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930060047] [2024-06-27 23:01:57,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930060047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:57,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:57,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:57,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462646982] [2024-06-27 23:01:57,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:57,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:57,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:57,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:57,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 50 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:57,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:57,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:57,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:57,657 INFO L124 PetriNetUnfolderBase]: 109/249 cut-off events. [2024-06-27 23:01:57,658 INFO L125 PetriNetUnfolderBase]: For 1744/1744 co-relation queries the response was YES. [2024-06-27 23:01:57,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 249 events. 109/249 cut-off events. For 1744/1744 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1022 event pairs, 19 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 948. Up to 174 conditions per place. [2024-06-27 23:01:57,660 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-27 23:01:57,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 455 flow [2024-06-27 23:01:57,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:57,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 23:01:57,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036866359447005 [2024-06-27 23:01:57,661 INFO L175 Difference]: Start difference. First operand has 66 places, 50 transitions, 303 flow. Second operand 7 states and 131 transitions. [2024-06-27 23:01:57,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 455 flow [2024-06-27 23:01:57,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 65 transitions, 431 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:57,666 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 303 flow [2024-06-27 23:01:57,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2024-06-27 23:01:57,666 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-06-27 23:01:57,667 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 303 flow [2024-06-27 23:01:57,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:57,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:57,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:57,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:01:57,667 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)] === [2024-06-27 23:01:57,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:57,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1789876996, now seen corresponding path program 1 times [2024-06-27 23:01:57,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:57,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248476205] [2024-06-27 23:01:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:57,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:57,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:57,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248476205] [2024-06-27 23:01:57,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248476205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:57,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:57,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203448895] [2024-06-27 23:01:57,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:57,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:57,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:57,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:57,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:57,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:57,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:57,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:57,878 INFO L124 PetriNetUnfolderBase]: 112/256 cut-off events. [2024-06-27 23:01:57,878 INFO L125 PetriNetUnfolderBase]: For 1828/1828 co-relation queries the response was YES. [2024-06-27 23:01:57,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 256 events. 112/256 cut-off events. For 1828/1828 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1054 event pairs, 18 based on Foata normal form. 1/255 useless extension candidates. Maximal degree in co-relation 980. Up to 182 conditions per place. [2024-06-27 23:01:57,880 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 48 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-27 23:01:57,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 66 transitions, 469 flow [2024-06-27 23:01:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 23:01:57,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036866359447005 [2024-06-27 23:01:57,882 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 303 flow. Second operand 7 states and 131 transitions. [2024-06-27 23:01:57,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 66 transitions, 469 flow [2024-06-27 23:01:57,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 447 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:57,886 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 326 flow [2024-06-27 23:01:57,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=326, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2024-06-27 23:01:57,886 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2024-06-27 23:01:57,887 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 326 flow [2024-06-27 23:01:57,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:57,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:57,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:57,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:01:57,887 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)] === [2024-06-27 23:01:57,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:57,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1801788804, now seen corresponding path program 3 times [2024-06-27 23:01:57,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:57,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496599031] [2024-06-27 23:01:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:57,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:58,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:58,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496599031] [2024-06-27 23:01:58,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496599031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:58,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:58,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:58,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913002418] [2024-06-27 23:01:58,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:58,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:58,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:58,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:58,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:58,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:58,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:58,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:58,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:58,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:58,094 INFO L124 PetriNetUnfolderBase]: 116/263 cut-off events. [2024-06-27 23:01:58,095 INFO L125 PetriNetUnfolderBase]: For 2202/2202 co-relation queries the response was YES. [2024-06-27 23:01:58,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1073 conditions, 263 events. 116/263 cut-off events. For 2202/2202 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1106 event pairs, 19 based on Foata normal form. 2/262 useless extension candidates. Maximal degree in co-relation 1041. Up to 172 conditions per place. [2024-06-27 23:01:58,097 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 41 selfloop transitions, 17 changer transitions 0/65 dead transitions. [2024-06-27 23:01:58,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 65 transitions, 480 flow [2024-06-27 23:01:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:58,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 23:01:58,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6082949308755761 [2024-06-27 23:01:58,098 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 326 flow. Second operand 7 states and 132 transitions. [2024-06-27 23:01:58,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 65 transitions, 480 flow [2024-06-27 23:01:58,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 451 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:58,102 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 347 flow [2024-06-27 23:01:58,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=347, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2024-06-27 23:01:58,103 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-27 23:01:58,103 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 347 flow [2024-06-27 23:01:58,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:58,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:58,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:58,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:01:58,104 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)] === [2024-06-27 23:01:58,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash 396720524, now seen corresponding path program 2 times [2024-06-27 23:01:58,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:58,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747512688] [2024-06-27 23:01:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:58,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:58,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:58,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747512688] [2024-06-27 23:01:58,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747512688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:58,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:58,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:58,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991790751] [2024-06-27 23:01:58,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:58,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:58,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:58,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:58,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:58,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:58,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:58,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:58,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:58,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:58,279 INFO L124 PetriNetUnfolderBase]: 124/279 cut-off events. [2024-06-27 23:01:58,279 INFO L125 PetriNetUnfolderBase]: For 2535/2535 co-relation queries the response was YES. [2024-06-27 23:01:58,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 279 events. 124/279 cut-off events. For 2535/2535 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1198 event pairs, 20 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 1148. Up to 161 conditions per place. [2024-06-27 23:01:58,281 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 40 selfloop transitions, 25 changer transitions 0/72 dead transitions. [2024-06-27 23:01:58,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 629 flow [2024-06-27 23:01:58,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 23:01:58,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6359447004608295 [2024-06-27 23:01:58,282 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 347 flow. Second operand 7 states and 138 transitions. [2024-06-27 23:01:58,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 629 flow [2024-06-27 23:01:58,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 589 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:58,288 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 420 flow [2024-06-27 23:01:58,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-06-27 23:01:58,289 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-27 23:01:58,289 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 420 flow [2024-06-27 23:01:58,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:58,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:58,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:58,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:01:58,290 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)] === [2024-06-27 23:01:58,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash 396900014, now seen corresponding path program 3 times [2024-06-27 23:01:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:58,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209296068] [2024-06-27 23:01:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:58,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:58,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:58,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209296068] [2024-06-27 23:01:58,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209296068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:58,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:58,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:58,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323720756] [2024-06-27 23:01:58,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:58,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:58,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:58,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:58,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:58,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:58,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 420 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:58,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:58,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:58,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:58,459 INFO L124 PetriNetUnfolderBase]: 122/276 cut-off events. [2024-06-27 23:01:58,459 INFO L125 PetriNetUnfolderBase]: For 2681/2681 co-relation queries the response was YES. [2024-06-27 23:01:58,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 276 events. 122/276 cut-off events. For 2681/2681 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1190 event pairs, 20 based on Foata normal form. 1/273 useless extension candidates. Maximal degree in co-relation 1149. Up to 159 conditions per place. [2024-06-27 23:01:58,461 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 38 selfloop transitions, 26 changer transitions 0/71 dead transitions. [2024-06-27 23:01:58,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 612 flow [2024-06-27 23:01:58,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 23:01:58,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6267281105990783 [2024-06-27 23:01:58,463 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 420 flow. Second operand 7 states and 136 transitions. [2024-06-27 23:01:58,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 612 flow [2024-06-27 23:01:58,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 71 transitions, 573 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 23:01:58,467 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 438 flow [2024-06-27 23:01:58,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=438, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2024-06-27 23:01:58,468 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2024-06-27 23:01:58,468 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 438 flow [2024-06-27 23:01:58,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:58,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:58,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:58,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:01:58,469 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)] === [2024-06-27 23:01:58,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:58,469 INFO L85 PathProgramCache]: Analyzing trace with hash 745035802, now seen corresponding path program 1 times [2024-06-27 23:01:58,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:58,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281373722] [2024-06-27 23:01:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:58,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:58,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:58,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281373722] [2024-06-27 23:01:58,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281373722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:58,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:58,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:58,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505450633] [2024-06-27 23:01:58,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:58,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:58,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:58,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:58,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:58,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:58,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:58,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:58,659 INFO L124 PetriNetUnfolderBase]: 126/284 cut-off events. [2024-06-27 23:01:58,660 INFO L125 PetriNetUnfolderBase]: For 3170/3170 co-relation queries the response was YES. [2024-06-27 23:01:58,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 284 events. 126/284 cut-off events. For 3170/3170 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1234 event pairs, 20 based on Foata normal form. 2/282 useless extension candidates. Maximal degree in co-relation 1218. Up to 196 conditions per place. [2024-06-27 23:01:58,662 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 48 selfloop transitions, 17 changer transitions 0/72 dead transitions. [2024-06-27 23:01:58,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 72 transitions, 602 flow [2024-06-27 23:01:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:58,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 23:01:58,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6082949308755761 [2024-06-27 23:01:58,663 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 438 flow. Second operand 7 states and 132 transitions. [2024-06-27 23:01:58,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 72 transitions, 602 flow [2024-06-27 23:01:58,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 545 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:58,668 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 427 flow [2024-06-27 23:01:58,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2024-06-27 23:01:58,669 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-06-27 23:01:58,669 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 427 flow [2024-06-27 23:01:58,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:58,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:58,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:58,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:01:58,670 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)] === [2024-06-27 23:01:58,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash -528819396, now seen corresponding path program 4 times [2024-06-27 23:01:58,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:58,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18950821] [2024-06-27 23:01:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:58,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:58,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:58,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18950821] [2024-06-27 23:01:58,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18950821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:58,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:58,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:58,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245466626] [2024-06-27 23:01:58,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:58,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:58,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:58,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:58,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:58,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:58,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 427 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:58,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:58,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:58,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:58,846 INFO L124 PetriNetUnfolderBase]: 123/275 cut-off events. [2024-06-27 23:01:58,847 INFO L125 PetriNetUnfolderBase]: For 3009/3009 co-relation queries the response was YES. [2024-06-27 23:01:58,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 275 events. 123/275 cut-off events. For 3009/3009 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1209 event pairs, 25 based on Foata normal form. 2/271 useless extension candidates. Maximal degree in co-relation 1155. Up to 185 conditions per place. [2024-06-27 23:01:58,848 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 45 selfloop transitions, 17 changer transitions 0/69 dead transitions. [2024-06-27 23:01:58,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 69 transitions, 571 flow [2024-06-27 23:01:58,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 23:01:58,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944700460829493 [2024-06-27 23:01:58,850 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 427 flow. Second operand 7 states and 129 transitions. [2024-06-27 23:01:58,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 69 transitions, 571 flow [2024-06-27 23:01:58,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 69 transitions, 535 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:58,855 INFO L231 Difference]: Finished difference. Result has 82 places, 60 transitions, 429 flow [2024-06-27 23:01:58,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2024-06-27 23:01:58,856 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-27 23:01:58,856 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 429 flow [2024-06-27 23:01:58,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:58,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:58,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:58,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:01:58,857 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)] === [2024-06-27 23:01:58,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:58,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1831103964, now seen corresponding path program 4 times [2024-06-27 23:01:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:58,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995229421] [2024-06-27 23:01:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:58,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:58,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:58,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995229421] [2024-06-27 23:01:58,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995229421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:58,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:58,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:58,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420349071] [2024-06-27 23:01:58,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:58,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:58,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:58,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:58,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:58,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:58,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:58,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:58,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:59,039 INFO L124 PetriNetUnfolderBase]: 131/292 cut-off events. [2024-06-27 23:01:59,040 INFO L125 PetriNetUnfolderBase]: For 3350/3350 co-relation queries the response was YES. [2024-06-27 23:01:59,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 292 events. 131/292 cut-off events. For 3350/3350 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1302 event pairs, 25 based on Foata normal form. 1/287 useless extension candidates. Maximal degree in co-relation 1257. Up to 172 conditions per place. [2024-06-27 23:01:59,042 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 38 selfloop transitions, 29 changer transitions 0/74 dead transitions. [2024-06-27 23:01:59,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 74 transitions, 713 flow [2024-06-27 23:01:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 23:01:59,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6221198156682027 [2024-06-27 23:01:59,043 INFO L175 Difference]: Start difference. First operand has 82 places, 60 transitions, 429 flow. Second operand 7 states and 135 transitions. [2024-06-27 23:01:59,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 74 transitions, 713 flow [2024-06-27 23:01:59,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 74 transitions, 665 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:59,049 INFO L231 Difference]: Finished difference. Result has 83 places, 64 transitions, 488 flow [2024-06-27 23:01:59,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=488, PETRI_PLACES=83, PETRI_TRANSITIONS=64} [2024-06-27 23:01:59,050 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-06-27 23:01:59,050 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 64 transitions, 488 flow [2024-06-27 23:01:59,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:59,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:59,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:59,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:01:59,050 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)] === [2024-06-27 23:01:59,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:59,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1832110790, now seen corresponding path program 5 times [2024-06-27 23:01:59,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:59,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486489269] [2024-06-27 23:01:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:59,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:59,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:59,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486489269] [2024-06-27 23:01:59,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486489269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:59,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:59,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:59,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697317203] [2024-06-27 23:01:59,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:59,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:59,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:59,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:59,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:59,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:59,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 64 transitions, 488 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:59,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:59,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:59,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:59,201 INFO L124 PetriNetUnfolderBase]: 129/289 cut-off events. [2024-06-27 23:01:59,202 INFO L125 PetriNetUnfolderBase]: For 3394/3394 co-relation queries the response was YES. [2024-06-27 23:01:59,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 289 events. 129/289 cut-off events. For 3394/3394 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1286 event pairs, 25 based on Foata normal form. 1/284 useless extension candidates. Maximal degree in co-relation 1228. Up to 170 conditions per place. [2024-06-27 23:01:59,204 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 36 selfloop transitions, 30 changer transitions 0/73 dead transitions. [2024-06-27 23:01:59,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 73 transitions, 684 flow [2024-06-27 23:01:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 23:01:59,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6129032258064516 [2024-06-27 23:01:59,205 INFO L175 Difference]: Start difference. First operand has 83 places, 64 transitions, 488 flow. Second operand 7 states and 133 transitions. [2024-06-27 23:01:59,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 73 transitions, 684 flow [2024-06-27 23:01:59,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 591 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:59,212 INFO L231 Difference]: Finished difference. Result has 85 places, 64 transitions, 460 flow [2024-06-27 23:01:59,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=460, PETRI_PLACES=85, PETRI_TRANSITIONS=64} [2024-06-27 23:01:59,212 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2024-06-27 23:01:59,213 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 64 transitions, 460 flow [2024-06-27 23:01:59,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:59,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:59,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:59,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:01:59,213 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)] === [2024-06-27 23:01:59,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:59,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2116203834, now seen corresponding path program 6 times [2024-06-27 23:01:59,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:59,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812449499] [2024-06-27 23:01:59,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:59,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:59,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:59,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812449499] [2024-06-27 23:01:59,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812449499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:59,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:59,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:59,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847516120] [2024-06-27 23:01:59,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:59,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:59,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:59,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:59,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:59,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 64 transitions, 460 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:59,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:59,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:59,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:59,392 INFO L124 PetriNetUnfolderBase]: 127/292 cut-off events. [2024-06-27 23:01:59,392 INFO L125 PetriNetUnfolderBase]: For 3237/3237 co-relation queries the response was YES. [2024-06-27 23:01:59,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 292 events. 127/292 cut-off events. For 3237/3237 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1295 event pairs, 17 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 1159. Up to 222 conditions per place. [2024-06-27 23:01:59,394 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 54 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-27 23:01:59,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 72 transitions, 608 flow [2024-06-27 23:01:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 23:01:59,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576036866359447 [2024-06-27 23:01:59,395 INFO L175 Difference]: Start difference. First operand has 85 places, 64 transitions, 460 flow. Second operand 7 states and 125 transitions. [2024-06-27 23:01:59,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 72 transitions, 608 flow [2024-06-27 23:01:59,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 72 transitions, 540 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:59,401 INFO L231 Difference]: Finished difference. Result has 87 places, 64 transitions, 419 flow [2024-06-27 23:01:59,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=419, PETRI_PLACES=87, PETRI_TRANSITIONS=64} [2024-06-27 23:01:59,402 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-27 23:01:59,402 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 64 transitions, 419 flow [2024-06-27 23:01:59,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:59,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:59,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:59,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:01:59,403 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)] === [2024-06-27 23:01:59,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:59,403 INFO L85 PathProgramCache]: Analyzing trace with hash -995904452, now seen corresponding path program 2 times [2024-06-27 23:01:59,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:59,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559070976] [2024-06-27 23:01:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:59,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:59,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:59,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559070976] [2024-06-27 23:01:59,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559070976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:59,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:59,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:59,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493797646] [2024-06-27 23:01:59,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:59,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:59,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:59,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:59,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 64 transitions, 419 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:59,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:59,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:59,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:59,599 INFO L124 PetriNetUnfolderBase]: 131/297 cut-off events. [2024-06-27 23:01:59,599 INFO L125 PetriNetUnfolderBase]: For 3710/3710 co-relation queries the response was YES. [2024-06-27 23:01:59,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 297 events. 131/297 cut-off events. For 3710/3710 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1317 event pairs, 21 based on Foata normal form. 2/295 useless extension candidates. Maximal degree in co-relation 1146. Up to 206 conditions per place. [2024-06-27 23:01:59,601 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 50 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-06-27 23:01:59,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 74 transitions, 579 flow [2024-06-27 23:01:59,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:59,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:59,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 23:01:59,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944700460829493 [2024-06-27 23:01:59,602 INFO L175 Difference]: Start difference. First operand has 87 places, 64 transitions, 419 flow. Second operand 7 states and 129 transitions. [2024-06-27 23:01:59,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 74 transitions, 579 flow [2024-06-27 23:01:59,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 74 transitions, 530 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:59,611 INFO L231 Difference]: Finished difference. Result has 86 places, 65 transitions, 416 flow [2024-06-27 23:01:59,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2024-06-27 23:01:59,612 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2024-06-27 23:01:59,612 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 416 flow [2024-06-27 23:01:59,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:59,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:59,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:59,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:01:59,612 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)] === [2024-06-27 23:01:59,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:59,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2126332092, now seen corresponding path program 3 times [2024-06-27 23:01:59,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:59,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811742812] [2024-06-27 23:01:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:59,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:59,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:59,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811742812] [2024-06-27 23:01:59,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811742812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:59,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:59,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:59,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247001006] [2024-06-27 23:01:59,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:59,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:59,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:59,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:59,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:59,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:59,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:59,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:59,841 INFO L124 PetriNetUnfolderBase]: 135/312 cut-off events. [2024-06-27 23:01:59,842 INFO L125 PetriNetUnfolderBase]: For 3995/3995 co-relation queries the response was YES. [2024-06-27 23:01:59,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 312 events. 135/312 cut-off events. For 3995/3995 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1420 event pairs, 19 based on Foata normal form. 2/312 useless extension candidates. Maximal degree in co-relation 1182. Up to 235 conditions per place. [2024-06-27 23:01:59,843 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 58 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-27 23:01:59,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 75 transitions, 580 flow [2024-06-27 23:01:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 23:01:59,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576036866359447 [2024-06-27 23:01:59,845 INFO L175 Difference]: Start difference. First operand has 86 places, 65 transitions, 416 flow. Second operand 7 states and 125 transitions. [2024-06-27 23:01:59,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 75 transitions, 580 flow [2024-06-27 23:01:59,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 75 transitions, 544 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:59,852 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 414 flow [2024-06-27 23:01:59,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2024-06-27 23:01:59,852 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2024-06-27 23:01:59,853 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 414 flow [2024-06-27 23:01:59,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:59,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:59,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:59,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:01:59,853 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)] === [2024-06-27 23:01:59,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:59,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2126688282, now seen corresponding path program 4 times [2024-06-27 23:01:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:59,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285133813] [2024-06-27 23:01:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:59,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:59,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285133813] [2024-06-27 23:01:59,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285133813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:59,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:59,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:01:59,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085373187] [2024-06-27 23:01:59,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:01:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:59,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:01:59,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:01:59,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:01:59,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 414 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:01:59,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:59,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:01:59,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:00,064 INFO L124 PetriNetUnfolderBase]: 132/307 cut-off events. [2024-06-27 23:02:00,064 INFO L125 PetriNetUnfolderBase]: For 3612/3612 co-relation queries the response was YES. [2024-06-27 23:02:00,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 307 events. 132/307 cut-off events. For 3612/3612 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1391 event pairs, 16 based on Foata normal form. 2/307 useless extension candidates. Maximal degree in co-relation 1112. Up to 216 conditions per place. [2024-06-27 23:02:00,066 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 58 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-27 23:02:00,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 77 transitions, 578 flow [2024-06-27 23:02:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 23:02:00,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685483870967742 [2024-06-27 23:02:00,067 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 414 flow. Second operand 8 states and 141 transitions. [2024-06-27 23:02:00,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 77 transitions, 578 flow [2024-06-27 23:02:00,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 77 transitions, 554 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 23:02:00,077 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 418 flow [2024-06-27 23:02:00,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2024-06-27 23:02:00,077 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-06-27 23:02:00,077 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 418 flow [2024-06-27 23:02:00,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:00,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:00,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:00,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:02:00,078 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)] === [2024-06-27 23:02:00,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:00,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1246387495, now seen corresponding path program 1 times [2024-06-27 23:02:00,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:00,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087121743] [2024-06-27 23:02:00,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:00,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:00,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:00,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087121743] [2024-06-27 23:02:00,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087121743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:00,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:00,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:00,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022999157] [2024-06-27 23:02:00,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:00,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:00,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:00,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:00,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:00,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:00,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 418 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:00,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:00,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:00,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:00,344 INFO L124 PetriNetUnfolderBase]: 162/377 cut-off events. [2024-06-27 23:02:00,344 INFO L125 PetriNetUnfolderBase]: For 8267/8267 co-relation queries the response was YES. [2024-06-27 23:02:00,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1579 conditions, 377 events. 162/377 cut-off events. For 8267/8267 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1808 event pairs, 28 based on Foata normal form. 6/381 useless extension candidates. Maximal degree in co-relation 1538. Up to 177 conditions per place. [2024-06-27 23:02:00,346 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 63 selfloop transitions, 9 changer transitions 12/91 dead transitions. [2024-06-27 23:02:00,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 91 transitions, 720 flow [2024-06-27 23:02:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:02:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:02:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:02:00,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057347670250897 [2024-06-27 23:02:00,347 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 418 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:02:00,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 91 transitions, 720 flow [2024-06-27 23:02:00,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 91 transitions, 690 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 23:02:00,359 INFO L231 Difference]: Finished difference. Result has 94 places, 63 transitions, 391 flow [2024-06-27 23:02:00,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=391, PETRI_PLACES=94, PETRI_TRANSITIONS=63} [2024-06-27 23:02:00,360 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-06-27 23:02:00,360 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 63 transitions, 391 flow [2024-06-27 23:02:00,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:00,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:00,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:00,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:02:00,361 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)] === [2024-06-27 23:02:00,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:00,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1503735035, now seen corresponding path program 2 times [2024-06-27 23:02:00,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:00,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279572971] [2024-06-27 23:02:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:00,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:00,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:00,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279572971] [2024-06-27 23:02:00,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279572971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:00,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:00,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:00,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557565397] [2024-06-27 23:02:00,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:00,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:00,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:00,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:00,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:00,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 63 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:00,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:00,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:00,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:00,595 INFO L124 PetriNetUnfolderBase]: 146/339 cut-off events. [2024-06-27 23:02:00,595 INFO L125 PetriNetUnfolderBase]: For 8785/8785 co-relation queries the response was YES. [2024-06-27 23:02:00,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1476 conditions, 339 events. 146/339 cut-off events. For 8785/8785 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1584 event pairs, 26 based on Foata normal form. 6/343 useless extension candidates. Maximal degree in co-relation 1434. Up to 177 conditions per place. [2024-06-27 23:02:00,597 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 62 selfloop transitions, 8 changer transitions 6/83 dead transitions. [2024-06-27 23:02:00,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 83 transitions, 667 flow [2024-06-27 23:02:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 23:02:00,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5967741935483871 [2024-06-27 23:02:00,598 INFO L175 Difference]: Start difference. First operand has 94 places, 63 transitions, 391 flow. Second operand 8 states and 148 transitions. [2024-06-27 23:02:00,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 83 transitions, 667 flow [2024-06-27 23:02:00,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 83 transitions, 623 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 23:02:00,608 INFO L231 Difference]: Finished difference. Result has 89 places, 61 transitions, 363 flow [2024-06-27 23:02:00,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=89, PETRI_TRANSITIONS=61} [2024-06-27 23:02:00,609 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-06-27 23:02:00,609 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 61 transitions, 363 flow [2024-06-27 23:02:00,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:00,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:00,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:00,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:02:00,610 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)] === [2024-06-27 23:02:00,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:00,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1503912665, now seen corresponding path program 3 times [2024-06-27 23:02:00,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:00,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98594833] [2024-06-27 23:02:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:00,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:00,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:00,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98594833] [2024-06-27 23:02:00,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98594833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:00,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:00,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:00,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228409125] [2024-06-27 23:02:00,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:00,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:00,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:00,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:00,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:00,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:00,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 61 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:00,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:00,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:00,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:00,822 INFO L124 PetriNetUnfolderBase]: 122/287 cut-off events. [2024-06-27 23:02:00,823 INFO L125 PetriNetUnfolderBase]: For 5628/5628 co-relation queries the response was YES. [2024-06-27 23:02:00,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 287 events. 122/287 cut-off events. For 5628/5628 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1277 event pairs, 18 based on Foata normal form. 8/293 useless extension candidates. Maximal degree in co-relation 1021. Up to 177 conditions per place. [2024-06-27 23:02:00,824 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 50 selfloop transitions, 4 changer transitions 16/77 dead transitions. [2024-06-27 23:02:00,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 77 transitions, 553 flow [2024-06-27 23:02:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 23:02:00,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5766129032258065 [2024-06-27 23:02:00,825 INFO L175 Difference]: Start difference. First operand has 89 places, 61 transitions, 363 flow. Second operand 8 states and 143 transitions. [2024-06-27 23:02:00,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 77 transitions, 553 flow [2024-06-27 23:02:00,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 535 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:02:00,832 INFO L231 Difference]: Finished difference. Result has 88 places, 56 transitions, 325 flow [2024-06-27 23:02:00,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=88, PETRI_TRANSITIONS=56} [2024-06-27 23:02:00,832 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2024-06-27 23:02:00,833 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 56 transitions, 325 flow [2024-06-27 23:02:00,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:00,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:00,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:00,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:02:00,833 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)] === [2024-06-27 23:02:00,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:00,834 INFO L85 PathProgramCache]: Analyzing trace with hash 629577339, now seen corresponding path program 4 times [2024-06-27 23:02:00,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:00,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127956482] [2024-06-27 23:02:00,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:00,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:00,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:00,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127956482] [2024-06-27 23:02:00,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127956482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:00,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:00,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:00,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584929795] [2024-06-27 23:02:00,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:00,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:00,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:00,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:00,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:00,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:00,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 56 transitions, 325 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:00,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:00,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:00,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:01,021 INFO L124 PetriNetUnfolderBase]: 112/259 cut-off events. [2024-06-27 23:02:01,021 INFO L125 PetriNetUnfolderBase]: For 5260/5260 co-relation queries the response was YES. [2024-06-27 23:02:01,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 259 events. 112/259 cut-off events. For 5260/5260 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1134 event pairs, 22 based on Foata normal form. 8/263 useless extension candidates. Maximal degree in co-relation 928. Up to 131 conditions per place. [2024-06-27 23:02:01,023 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 32 selfloop transitions, 21 changer transitions 9/69 dead transitions. [2024-06-27 23:02:01,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 69 transitions, 491 flow [2024-06-27 23:02:01,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:02:01,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6008064516129032 [2024-06-27 23:02:01,024 INFO L175 Difference]: Start difference. First operand has 88 places, 56 transitions, 325 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:02:01,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 69 transitions, 491 flow [2024-06-27 23:02:01,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 69 transitions, 475 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:02:01,030 INFO L231 Difference]: Finished difference. Result has 82 places, 53 transitions, 339 flow [2024-06-27 23:02:01,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=339, PETRI_PLACES=82, PETRI_TRANSITIONS=53} [2024-06-27 23:02:01,030 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-27 23:02:01,030 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 53 transitions, 339 flow [2024-06-27 23:02:01,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:01,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:01,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:01,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:02:01,031 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)] === [2024-06-27 23:02:01,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:01,031 INFO L85 PathProgramCache]: Analyzing trace with hash 894817531, now seen corresponding path program 5 times [2024-06-27 23:02:01,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:01,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880376678] [2024-06-27 23:02:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:01,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:01,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:01,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880376678] [2024-06-27 23:02:01,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880376678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:01,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:01,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:01,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080723173] [2024-06-27 23:02:01,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:01,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:01,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:01,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:01,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:01,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:01,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 53 transitions, 339 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:01,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:01,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:01,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:01,252 INFO L124 PetriNetUnfolderBase]: 125/294 cut-off events. [2024-06-27 23:02:01,252 INFO L125 PetriNetUnfolderBase]: For 6464/6464 co-relation queries the response was YES. [2024-06-27 23:02:01,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 294 events. 125/294 cut-off events. For 6464/6464 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1345 event pairs, 30 based on Foata normal form. 6/296 useless extension candidates. Maximal degree in co-relation 1214. Up to 117 conditions per place. [2024-06-27 23:02:01,254 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 37 selfloop transitions, 19 changer transitions 7/70 dead transitions. [2024-06-27 23:02:01,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 70 transitions, 567 flow [2024-06-27 23:02:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:02:01,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6088709677419355 [2024-06-27 23:02:01,255 INFO L175 Difference]: Start difference. First operand has 82 places, 53 transitions, 339 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:02:01,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 70 transitions, 567 flow [2024-06-27 23:02:01,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 70 transitions, 517 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:02:01,261 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 316 flow [2024-06-27 23:02:01,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=316, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2024-06-27 23:02:01,262 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-06-27 23:02:01,262 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 316 flow [2024-06-27 23:02:01,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:01,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:01,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:01,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:02:01,262 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)] === [2024-06-27 23:02:01,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:01,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1280401637, now seen corresponding path program 1 times [2024-06-27 23:02:01,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:01,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926567719] [2024-06-27 23:02:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:01,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:01,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:01,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926567719] [2024-06-27 23:02:01,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926567719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:01,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:01,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:01,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855498549] [2024-06-27 23:02:01,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:01,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:01,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:01,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:01,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:01,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:01,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 316 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:01,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:01,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:01,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:01,441 INFO L124 PetriNetUnfolderBase]: 100/237 cut-off events. [2024-06-27 23:02:01,441 INFO L125 PetriNetUnfolderBase]: For 4391/4391 co-relation queries the response was YES. [2024-06-27 23:02:01,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 237 events. 100/237 cut-off events. For 4391/4391 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 980 event pairs, 22 based on Foata normal form. 8/241 useless extension candidates. Maximal degree in co-relation 864. Up to 117 conditions per place. [2024-06-27 23:02:01,443 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 30 selfloop transitions, 17 changer transitions 9/63 dead transitions. [2024-06-27 23:02:01,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 63 transitions, 468 flow [2024-06-27 23:02:01,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 23:02:01,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5887096774193549 [2024-06-27 23:02:01,444 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 316 flow. Second operand 8 states and 146 transitions. [2024-06-27 23:02:01,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 63 transitions, 468 flow [2024-06-27 23:02:01,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 63 transitions, 426 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 23:02:01,448 INFO L231 Difference]: Finished difference. Result has 77 places, 47 transitions, 292 flow [2024-06-27 23:02:01,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=77, PETRI_TRANSITIONS=47} [2024-06-27 23:02:01,449 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-27 23:02:01,449 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 47 transitions, 292 flow [2024-06-27 23:02:01,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:01,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:01,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:01,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:02:01,450 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)] === [2024-06-27 23:02:01,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:01,450 INFO L85 PathProgramCache]: Analyzing trace with hash 802313183, now seen corresponding path program 2 times [2024-06-27 23:02:01,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:01,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503421090] [2024-06-27 23:02:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:01,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:01,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:01,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503421090] [2024-06-27 23:02:01,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503421090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:01,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:01,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:01,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761433094] [2024-06-27 23:02:01,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:01,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:01,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:01,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:01,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:01,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:01,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 47 transitions, 292 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:01,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:01,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:01,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:01,641 INFO L124 PetriNetUnfolderBase]: 91/220 cut-off events. [2024-06-27 23:02:01,642 INFO L125 PetriNetUnfolderBase]: For 3232/3232 co-relation queries the response was YES. [2024-06-27 23:02:01,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 220 events. 91/220 cut-off events. For 3232/3232 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 882 event pairs, 16 based on Foata normal form. 6/222 useless extension candidates. Maximal degree in co-relation 788. Up to 107 conditions per place. [2024-06-27 23:02:01,643 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 24 selfloop transitions, 13 changer transitions 16/60 dead transitions. [2024-06-27 23:02:01,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 60 transitions, 432 flow [2024-06-27 23:02:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 23:02:01,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-27 23:02:01,644 INFO L175 Difference]: Start difference. First operand has 77 places, 47 transitions, 292 flow. Second operand 8 states and 144 transitions. [2024-06-27 23:02:01,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 60 transitions, 432 flow [2024-06-27 23:02:01,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 60 transitions, 394 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:02:01,649 INFO L231 Difference]: Finished difference. Result has 74 places, 42 transitions, 253 flow [2024-06-27 23:02:01,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=253, PETRI_PLACES=74, PETRI_TRANSITIONS=42} [2024-06-27 23:02:01,649 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-27 23:02:01,649 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 42 transitions, 253 flow [2024-06-27 23:02:01,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:01,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:01,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:01,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:02:01,650 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)] === [2024-06-27 23:02:01,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:01,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1212005507, now seen corresponding path program 3 times [2024-06-27 23:02:01,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:01,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793933218] [2024-06-27 23:02:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:01,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:01,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:01,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793933218] [2024-06-27 23:02:01,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793933218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:01,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:01,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:01,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258217145] [2024-06-27 23:02:01,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:01,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:01,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:01,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:01,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:01,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:01,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 42 transitions, 253 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:01,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:01,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:01,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:01,843 INFO L124 PetriNetUnfolderBase]: 83/196 cut-off events. [2024-06-27 23:02:01,843 INFO L125 PetriNetUnfolderBase]: For 3304/3304 co-relation queries the response was YES. [2024-06-27 23:02:01,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 196 events. 83/196 cut-off events. For 3304/3304 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 765 event pairs, 20 based on Foata normal form. 8/203 useless extension candidates. Maximal degree in co-relation 710. Up to 103 conditions per place. [2024-06-27 23:02:01,844 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 22 selfloop transitions, 14 changer transitions 9/52 dead transitions. [2024-06-27 23:02:01,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 52 transitions, 375 flow [2024-06-27 23:02:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 23:02:01,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725806451612904 [2024-06-27 23:02:01,845 INFO L175 Difference]: Start difference. First operand has 74 places, 42 transitions, 253 flow. Second operand 8 states and 142 transitions. [2024-06-27 23:02:01,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 52 transitions, 375 flow [2024-06-27 23:02:01,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 52 transitions, 333 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 23:02:01,849 INFO L231 Difference]: Finished difference. Result has 65 places, 39 transitions, 227 flow [2024-06-27 23:02:01,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=227, PETRI_PLACES=65, PETRI_TRANSITIONS=39} [2024-06-27 23:02:01,849 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-27 23:02:01,849 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 39 transitions, 227 flow [2024-06-27 23:02:01,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:01,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:01,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:01,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:02:01,850 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)] === [2024-06-27 23:02:01,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:01,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1896948231, now seen corresponding path program 4 times [2024-06-27 23:02:01,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:01,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412298978] [2024-06-27 23:02:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:01,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:01,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:01,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412298978] [2024-06-27 23:02:01,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412298978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:01,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:01,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:01,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443132481] [2024-06-27 23:02:01,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:01,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:01,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:01,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:01,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:01,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:01,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 39 transitions, 227 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:01,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:01,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:01,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:02,053 INFO L124 PetriNetUnfolderBase]: 96/231 cut-off events. [2024-06-27 23:02:02,054 INFO L125 PetriNetUnfolderBase]: For 2974/2974 co-relation queries the response was YES. [2024-06-27 23:02:02,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 231 events. 96/231 cut-off events. For 2974/2974 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 988 event pairs, 30 based on Foata normal form. 6/236 useless extension candidates. Maximal degree in co-relation 870. Up to 89 conditions per place. [2024-06-27 23:02:02,055 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 27 selfloop transitions, 12 changer transitions 7/53 dead transitions. [2024-06-27 23:02:02,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 53 transitions, 393 flow [2024-06-27 23:02:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 23:02:02,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-27 23:02:02,057 INFO L175 Difference]: Start difference. First operand has 65 places, 39 transitions, 227 flow. Second operand 8 states and 144 transitions. [2024-06-27 23:02:02,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 53 transitions, 393 flow [2024-06-27 23:02:02,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 357 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:02:02,061 INFO L231 Difference]: Finished difference. Result has 63 places, 36 transitions, 204 flow [2024-06-27 23:02:02,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=204, PETRI_PLACES=63, PETRI_TRANSITIONS=36} [2024-06-27 23:02:02,061 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-27 23:02:02,062 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 36 transitions, 204 flow [2024-06-27 23:02:02,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:02,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:02,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:02,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:02:02,062 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)] === [2024-06-27 23:02:02,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:02,063 INFO L85 PathProgramCache]: Analyzing trace with hash 278158841, now seen corresponding path program 5 times [2024-06-27 23:02:02,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:02,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546580741] [2024-06-27 23:02:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:02,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:02,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:02,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546580741] [2024-06-27 23:02:02,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546580741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:02,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:02,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:02,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750865657] [2024-06-27 23:02:02,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:02,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:02,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:02,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:02,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:02,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:02,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 36 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:02,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:02,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:02,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:02,250 INFO L124 PetriNetUnfolderBase]: 71/174 cut-off events. [2024-06-27 23:02:02,250 INFO L125 PetriNetUnfolderBase]: For 1943/1943 co-relation queries the response was YES. [2024-06-27 23:02:02,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 174 events. 71/174 cut-off events. For 1943/1943 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 657 event pairs, 22 based on Foata normal form. 8/181 useless extension candidates. Maximal degree in co-relation 590. Up to 89 conditions per place. [2024-06-27 23:02:02,251 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 19 selfloop transitions, 11 changer transitions 9/46 dead transitions. [2024-06-27 23:02:02,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 46 transitions, 312 flow [2024-06-27 23:02:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:02,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 23:02:02,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-06-27 23:02:02,252 INFO L175 Difference]: Start difference. First operand has 63 places, 36 transitions, 204 flow. Second operand 8 states and 140 transitions. [2024-06-27 23:02:02,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 46 transitions, 312 flow [2024-06-27 23:02:02,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 46 transitions, 284 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 23:02:02,254 INFO L231 Difference]: Finished difference. Result has 60 places, 33 transitions, 182 flow [2024-06-27 23:02:02,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=182, PETRI_PLACES=60, PETRI_TRANSITIONS=33} [2024-06-27 23:02:02,255 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2024-06-27 23:02:02,255 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 33 transitions, 182 flow [2024-06-27 23:02:02,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:02,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:02,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:02,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:02:02,255 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)] === [2024-06-27 23:02:02,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:02,256 INFO L85 PathProgramCache]: Analyzing trace with hash 273390297, now seen corresponding path program 6 times [2024-06-27 23:02:02,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:02,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149334324] [2024-06-27 23:02:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:02,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:02,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:02,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149334324] [2024-06-27 23:02:02,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149334324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:02,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:02,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:02,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486507349] [2024-06-27 23:02:02,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:02,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:02,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:02,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:02,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:02,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:02,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 33 transitions, 182 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:02,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:02,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:02,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:02,459 INFO L124 PetriNetUnfolderBase]: 77/192 cut-off events. [2024-06-27 23:02:02,459 INFO L125 PetriNetUnfolderBase]: For 1796/1796 co-relation queries the response was YES. [2024-06-27 23:02:02,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 192 events. 77/192 cut-off events. For 1796/1796 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 741 event pairs, 27 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 678. Up to 62 conditions per place. [2024-06-27 23:02:02,460 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 23 selfloop transitions, 8 changer transitions 8/46 dead transitions. [2024-06-27 23:02:02,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 46 transitions, 322 flow [2024-06-27 23:02:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 23:02:02,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-06-27 23:02:02,464 INFO L175 Difference]: Start difference. First operand has 60 places, 33 transitions, 182 flow. Second operand 8 states and 140 transitions. [2024-06-27 23:02:02,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 46 transitions, 322 flow [2024-06-27 23:02:02,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 46 transitions, 292 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:02:02,466 INFO L231 Difference]: Finished difference. Result has 57 places, 29 transitions, 151 flow [2024-06-27 23:02:02,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=151, PETRI_PLACES=57, PETRI_TRANSITIONS=29} [2024-06-27 23:02:02,467 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2024-06-27 23:02:02,467 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 29 transitions, 151 flow [2024-06-27 23:02:02,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:02,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:02,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:02,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:02:02,467 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)] === [2024-06-27 23:02:02,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:02,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2134006279, now seen corresponding path program 6 times [2024-06-27 23:02:02,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:02,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524301863] [2024-06-27 23:02:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:02,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:02,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:02,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524301863] [2024-06-27 23:02:02,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524301863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:02,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:02,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:02,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954017913] [2024-06-27 23:02:02,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:02,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:02,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:02,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:02,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:02,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:02,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 29 transitions, 151 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:02,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:02,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:02,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:02,701 INFO L124 PetriNetUnfolderBase]: 69/172 cut-off events. [2024-06-27 23:02:02,701 INFO L125 PetriNetUnfolderBase]: For 1532/1532 co-relation queries the response was YES. [2024-06-27 23:02:02,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 172 events. 69/172 cut-off events. For 1532/1532 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 636 event pairs, 27 based on Foata normal form. 6/177 useless extension candidates. Maximal degree in co-relation 600. Up to 56 conditions per place. [2024-06-27 23:02:02,702 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 22 selfloop transitions, 7 changer transitions 6/42 dead transitions. [2024-06-27 23:02:02,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 42 transitions, 279 flow [2024-06-27 23:02:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 23:02:02,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604838709677419 [2024-06-27 23:02:02,703 INFO L175 Difference]: Start difference. First operand has 57 places, 29 transitions, 151 flow. Second operand 8 states and 139 transitions. [2024-06-27 23:02:02,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 42 transitions, 279 flow [2024-06-27 23:02:02,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 247 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 23:02:02,705 INFO L231 Difference]: Finished difference. Result has 51 places, 27 transitions, 132 flow [2024-06-27 23:02:02,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=132, PETRI_PLACES=51, PETRI_TRANSITIONS=27} [2024-06-27 23:02:02,706 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2024-06-27 23:02:02,706 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 27 transitions, 132 flow [2024-06-27 23:02:02,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:02,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:02,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:02,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:02:02,706 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)] === [2024-06-27 23:02:02,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:02,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2134302949, now seen corresponding path program 7 times [2024-06-27 23:02:02,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:02,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86191936] [2024-06-27 23:02:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:02,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:02,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:02,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86191936] [2024-06-27 23:02:02,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86191936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:02,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:02,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:02,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555175224] [2024-06-27 23:02:02,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:02,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:02,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:02,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:02,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 27 transitions, 132 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:02,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:02,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:02,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:02,914 INFO L124 PetriNetUnfolderBase]: 45/120 cut-off events. [2024-06-27 23:02:02,915 INFO L125 PetriNetUnfolderBase]: For 646/646 co-relation queries the response was YES. [2024-06-27 23:02:02,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 120 events. 45/120 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 358 event pairs, 19 based on Foata normal form. 8/127 useless extension candidates. Maximal degree in co-relation 358. Up to 52 conditions per place. [2024-06-27 23:02:02,915 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 14 selfloop transitions, 4 changer transitions 11/36 dead transitions. [2024-06-27 23:02:02,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 36 transitions, 212 flow [2024-06-27 23:02:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 23:02:02,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-06-27 23:02:02,918 INFO L175 Difference]: Start difference. First operand has 51 places, 27 transitions, 132 flow. Second operand 8 states and 134 transitions. [2024-06-27 23:02:02,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 36 transitions, 212 flow [2024-06-27 23:02:02,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 36 transitions, 194 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 23:02:02,920 INFO L231 Difference]: Finished difference. Result has 50 places, 22 transitions, 92 flow [2024-06-27 23:02:02,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=92, PETRI_PLACES=50, PETRI_TRANSITIONS=22} [2024-06-27 23:02:02,920 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2024-06-27 23:02:02,920 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 22 transitions, 92 flow [2024-06-27 23:02:02,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:02,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:02,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:02,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:02:02,921 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)] === [2024-06-27 23:02:02,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:02,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1388326913, now seen corresponding path program 8 times [2024-06-27 23:02:02,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:02,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343433021] [2024-06-27 23:02:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:02,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:03,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:03,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343433021] [2024-06-27 23:02:03,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343433021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:03,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:03,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:03,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941574020] [2024-06-27 23:02:03,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:03,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:03,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:03,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:03,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:03,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-06-27 23:02:03,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 22 transitions, 92 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:03,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:03,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-06-27 23:02:03,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:03,133 INFO L124 PetriNetUnfolderBase]: 20/65 cut-off events. [2024-06-27 23:02:03,133 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-06-27 23:02:03,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 65 events. 20/65 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 105 event pairs, 0 based on Foata normal form. 6/70 useless extension candidates. Maximal degree in co-relation 156. Up to 24 conditions per place. [2024-06-27 23:02:03,134 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2024-06-27 23:02:03,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 28 transitions, 130 flow [2024-06-27 23:02:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 23:02:03,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080645161290323 [2024-06-27 23:02:03,135 INFO L175 Difference]: Start difference. First operand has 50 places, 22 transitions, 92 flow. Second operand 8 states and 126 transitions. [2024-06-27 23:02:03,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 28 transitions, 130 flow [2024-06-27 23:02:03,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 28 transitions, 104 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 23:02:03,135 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2024-06-27 23:02:03,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2024-06-27 23:02:03,136 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-27 23:02:03,136 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2024-06-27 23:02:03,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:02:03,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-27 23:02:03,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-27 23:02:03,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-27 23:02:03,141 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-27 23:02:03,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:02:03,141 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 6, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2024-06-27 23:02:03,143 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 23:02:03,143 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 23:02:03,146 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 23:02:03,146 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 23:02:03,147 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 11:02:03 BasicIcfg [2024-06-27 23:02:03,147 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 23:02:03,147 INFO L158 Benchmark]: Toolchain (without parser) took 10457.56ms. Allocated memory was 146.8MB in the beginning and 255.9MB in the end (delta: 109.1MB). Free memory was 109.3MB in the beginning and 211.6MB in the end (delta: -102.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-06-27 23:02:03,148 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory is still 71.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 23:02:03,148 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 146.8MB. Free memory is still 111.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 23:02:03,148 INFO L158 Benchmark]: CACSL2BoogieTranslator took 478.17ms. Allocated memory is still 146.8MB. Free memory was 108.8MB in the beginning and 84.1MB in the end (delta: 24.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-27 23:02:03,148 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.64ms. Allocated memory is still 146.8MB. Free memory was 84.1MB in the beginning and 82.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 23:02:03,149 INFO L158 Benchmark]: Boogie Preprocessor took 26.44ms. Allocated memory is still 146.8MB. Free memory was 82.0MB in the beginning and 79.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 23:02:03,149 INFO L158 Benchmark]: RCFGBuilder took 443.05ms. Allocated memory is still 146.8MB. Free memory was 79.9MB in the beginning and 59.5MB in the end (delta: 20.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-27 23:02:03,149 INFO L158 Benchmark]: TraceAbstraction took 9476.26ms. Allocated memory was 146.8MB in the beginning and 255.9MB in the end (delta: 109.1MB). Free memory was 59.0MB in the beginning and 211.6MB in the end (delta: -152.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 23:02:03,152 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 121.6MB. Free memory is still 71.8MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.16ms. Allocated memory is still 146.8MB. Free memory is still 111.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 478.17ms. Allocated memory is still 146.8MB. Free memory was 108.8MB in the beginning and 84.1MB in the end (delta: 24.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.64ms. Allocated memory is still 146.8MB. Free memory was 84.1MB in the beginning and 82.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.44ms. Allocated memory is still 146.8MB. Free memory was 82.0MB in the beginning and 79.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 443.05ms. Allocated memory is still 146.8MB. Free memory was 79.9MB in the beginning and 59.5MB in the end (delta: 20.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 9476.26ms. Allocated memory was 146.8MB in the beginning and 255.9MB in the end (delta: 109.1MB). Free memory was 59.0MB in the beginning and 211.6MB in the end (delta: -152.6MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 767]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 768]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.4s, OverallIterations: 41, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1733 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1262 mSDsluCounter, 405 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 233 mSDsCounter, 199 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5737 IncrementalHoareTripleChecker+Invalid, 5936 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 199 mSolverCounterUnsat, 172 mSDtfsCounter, 5737 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 255 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=488occurred in iteration=22, InterpolantAutomatonStates: 282, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 631 NumberOfCodeBlocks, 631 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 590 ConstructedInterpolants, 0 QuantifiedInterpolants, 5629 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! [2024-06-27 23:02:03,175 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