./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.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/safe022_tso.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/safe022_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe022_tso.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 23:00:40,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:00:40,685 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:00:40,691 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:00:40,692 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:00:40,721 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:00:40,725 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:00:40,725 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:00:40,726 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:00:40,730 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:00:40,730 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:00:40,731 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:00:40,732 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:00:40,733 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:00:40,733 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:00:40,733 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:00:40,734 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:00:40,734 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:00:40,734 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:00:40,735 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:00:40,735 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:00:40,735 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:00:40,736 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:00:40,736 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:00:40,736 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:00:40,736 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:00:40,737 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:00:40,737 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:00:40,738 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:00:40,738 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:00:40,739 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:00:40,739 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:00:40,739 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:00:40,740 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:00:40,740 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:00:40,740 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:00:40,740 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:00:40,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:00:40,741 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:00:40,741 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:00:40,741 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:00:40,742 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:00:40,742 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:00:40,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:00:41,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:00:41,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:00:41,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:00:41,097 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:00:41,097 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:00:41,099 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe022_tso.yml/witness.yml [2024-06-27 23:00:41,192 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:00:41,193 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:00:41,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-06-27 23:00:42,389 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:00:42,661 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:00:42,661 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-06-27 23:00:42,673 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ebac9e9e/e13f280fde774ae38dc59792c3d19d31/FLAG189cb7fb8 [2024-06-27 23:00:42,685 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ebac9e9e/e13f280fde774ae38dc59792c3d19d31 [2024-06-27 23:00:42,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:00:42,687 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:00:42,688 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:00:42,691 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:00:42,695 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:00:42,695 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:00:41" (1/2) ... [2024-06-27 23:00:42,696 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e69f765 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:42, skipping insertion in model container [2024-06-27 23:00:42,696 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:00:41" (1/2) ... [2024-06-27 23:00:42,697 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ed19ccb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:42, skipping insertion in model container [2024-06-27 23:00:42,697 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:00:42" (2/2) ... [2024-06-27 23:00:42,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e69f765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:42, skipping insertion in model container [2024-06-27 23:00:42,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:00:42" (2/2) ... [2024-06-27 23:00:42,698 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:00:42,724 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:00:42,726 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] ! multithreaded || (((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p1_EBX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )y >= 0LL) [2024-06-27 23:00:42,726 INFO L97 edCorrectnessWitness]: Location invariant before [L764-L764] ! multithreaded || (((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p1_EBX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p1_EBX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EBX) - (long long )y >= 0LL) [2024-06-27 23:00:42,726 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:00:42,726 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-27 23:00:42,774 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:00:43,054 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:00:43,065 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:00:43,160 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:00:43,198 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:00:43,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43 WrapperNode [2024-06-27 23:00:43,199 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:00:43,200 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:00:43,200 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:00:43,200 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:00:43,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (1/1) ... [2024-06-27 23:00:43,249 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (1/1) ... [2024-06-27 23:00:43,285 INFO L138 Inliner]: procedures = 174, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 57 [2024-06-27 23:00:43,286 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:00:43,286 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:00:43,287 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:00:43,287 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:00:43,297 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (1/1) ... [2024-06-27 23:00:43,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (1/1) ... [2024-06-27 23:00:43,302 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (1/1) ... [2024-06-27 23:00:43,326 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 23:00:43,327 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (1/1) ... [2024-06-27 23:00:43,327 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (1/1) ... [2024-06-27 23:00:43,341 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (1/1) ... [2024-06-27 23:00:43,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (1/1) ... [2024-06-27 23:00:43,349 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (1/1) ... [2024-06-27 23:00:43,350 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (1/1) ... [2024-06-27 23:00:43,352 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:00:43,357 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:00:43,357 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:00:43,357 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:00:43,358 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (1/1) ... [2024-06-27 23:00:43,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:00:43,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:00:43,432 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 23:00:43,505 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 23:00:43,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:00:43,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:00:43,522 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:00:43,522 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:00:43,522 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:00:43,522 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:00:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:00:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:00:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:00:43,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:00:43,524 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 23:00:43,646 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:00:43,649 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:00:43,862 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:00:43,862 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:00:43,931 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:00:43,932 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:00:43,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:00:43 BoogieIcfgContainer [2024-06-27 23:00:43,932 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:00:43,934 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:00:43,934 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:00:43,937 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:00:43,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:00:41" (1/4) ... [2024-06-27 23:00:43,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5a27dd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:00:43, skipping insertion in model container [2024-06-27 23:00:43,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:00:42" (2/4) ... [2024-06-27 23:00:43,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5a27dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:00:43, skipping insertion in model container [2024-06-27 23:00:43,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:43" (3/4) ... [2024-06-27 23:00:43,940 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5a27dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:00:43, skipping insertion in model container [2024-06-27 23:00:43,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:00:43" (4/4) ... [2024-06-27 23:00:43,945 INFO L112 eAbstractionObserver]: Analyzing ICFG safe022_tso.i [2024-06-27 23:00:43,959 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:00:43,959 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 23:00:43,959 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:00:43,996 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:00:44,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 66 flow [2024-06-27 23:00:44,068 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2024-06-27 23:00:44,068 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:00:44,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 0/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:00:44,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 66 flow [2024-06-27 23:00:44,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 48 flow [2024-06-27 23:00:44,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:00:44,088 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;@424131dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:00:44,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 23:00:44,091 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:00:44,091 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 23:00:44,092 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:00:44,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:44,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:00:44,093 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 23:00:44,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash 188072989, now seen corresponding path program 1 times [2024-06-27 23:00:44,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:44,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606868748] [2024-06-27 23:00:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:44,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:44,513 INFO 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 23:00:44,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:44,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606868748] [2024-06-27 23:00:44,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606868748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:44,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:44,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:00:44,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397896610] [2024-06-27 23:00:44,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:44,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:00:44,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:00:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:00:44,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 29 [2024-06-27 23:00:44,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:44,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:44,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 29 [2024-06-27 23:00:44,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:44,682 INFO L124 PetriNetUnfolderBase]: 65/142 cut-off events. [2024-06-27 23:00:44,683 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 23:00:44,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 142 events. 65/142 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 481 event pairs, 33 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 276. Up to 124 conditions per place. [2024-06-27 23:00:44,691 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 17 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-06-27 23:00:44,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 103 flow [2024-06-27 23:00:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:00:44,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:00:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-06-27 23:00:44,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-06-27 23:00:44,706 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 48 flow. Second operand 3 states and 61 transitions. [2024-06-27 23:00:44,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 103 flow [2024-06-27 23:00:44,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 100 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:44,712 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 67 flow [2024-06-27 23:00:44,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-06-27 23:00:44,717 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-27 23:00:44,717 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 67 flow [2024-06-27 23:00:44,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:44,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:44,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:44,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:00:44,719 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 23:00:44,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:44,719 INFO L85 PathProgramCache]: Analyzing trace with hash 349547388, now seen corresponding path program 1 times [2024-06-27 23:00:44,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:44,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671782933] [2024-06-27 23:00:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:44,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:44,943 INFO 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 23:00:44,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:44,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671782933] [2024-06-27 23:00:44,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671782933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:44,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:44,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:00:44,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498768321] [2024-06-27 23:00:44,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:44,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:00:44,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:44,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:00:44,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:00:44,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-06-27 23:00:44,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:44,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:44,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-06-27 23:00:44,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:45,094 INFO L124 PetriNetUnfolderBase]: 82/177 cut-off events. [2024-06-27 23:00:45,094 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 23:00:45,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 177 events. 82/177 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 625 event pairs, 34 based on Foata normal form. 2/177 useless extension candidates. Maximal degree in co-relation 396. Up to 144 conditions per place. [2024-06-27 23:00:45,097 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 24 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-27 23:00:45,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 156 flow [2024-06-27 23:00:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:00:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:00:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-06-27 23:00:45,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6637931034482759 [2024-06-27 23:00:45,101 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 67 flow. Second operand 4 states and 77 transitions. [2024-06-27 23:00:45,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 156 flow [2024-06-27 23:00:45,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:00:45,106 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 100 flow [2024-06-27 23:00:45,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-06-27 23:00:45,108 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2024-06-27 23:00:45,108 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 100 flow [2024-06-27 23:00:45,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:45,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:45,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:45,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:00:45,110 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 23:00:45,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:45,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2048931818, now seen corresponding path program 1 times [2024-06-27 23:00:45,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:45,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760454480] [2024-06-27 23:00:45,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:45,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:45,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:45,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760454480] [2024-06-27 23:00:45,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760454480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:45,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:45,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:00:45,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411519141] [2024-06-27 23:00:45,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:45,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:00:45,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:45,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:00:45,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:00:45,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:45,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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 23:00:45,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:45,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:45,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:45,366 INFO L124 PetriNetUnfolderBase]: 97/202 cut-off events. [2024-06-27 23:00:45,367 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-06-27 23:00:45,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 202 events. 97/202 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 721 event pairs, 28 based on Foata normal form. 2/203 useless extension candidates. Maximal degree in co-relation 518. Up to 161 conditions per place. [2024-06-27 23:00:45,371 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 33 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2024-06-27 23:00:45,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 45 transitions, 231 flow [2024-06-27 23:00:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:45,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-27 23:00:45,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6275862068965518 [2024-06-27 23:00:45,377 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 100 flow. Second operand 5 states and 91 transitions. [2024-06-27 23:00:45,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 45 transitions, 231 flow [2024-06-27 23:00:45,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 231 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 23:00:45,408 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 156 flow [2024-06-27 23:00:45,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-06-27 23:00:45,409 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2024-06-27 23:00:45,409 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 156 flow [2024-06-27 23:00:45,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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 23:00:45,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:45,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:45,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:00:45,410 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 23:00:45,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:45,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1928421163, now seen corresponding path program 1 times [2024-06-27 23:00:45,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:45,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247735395] [2024-06-27 23:00:45,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:45,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:45,655 INFO 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 23:00:45,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:45,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247735395] [2024-06-27 23:00:45,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247735395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:45,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:45,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:45,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323414053] [2024-06-27 23:00:45,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:45,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:45,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:45,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:45,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:45,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:45,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:45,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:45,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:45,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:45,799 INFO L124 PetriNetUnfolderBase]: 93/194 cut-off events. [2024-06-27 23:00:45,799 INFO L125 PetriNetUnfolderBase]: For 224/224 co-relation queries the response was YES. [2024-06-27 23:00:45,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 194 events. 93/194 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 675 event pairs, 12 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 573. Up to 135 conditions per place. [2024-06-27 23:00:45,801 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 33 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2024-06-27 23:00:45,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 264 flow [2024-06-27 23:00:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 23:00:45,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5919540229885057 [2024-06-27 23:00:45,803 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 156 flow. Second operand 6 states and 103 transitions. [2024-06-27 23:00:45,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 264 flow [2024-06-27 23:00:45,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 23:00:45,806 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 168 flow [2024-06-27 23:00:45,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2024-06-27 23:00:45,807 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 17 predicate places. [2024-06-27 23:00:45,807 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 168 flow [2024-06-27 23:00:45,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:45,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:45,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:45,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:00:45,808 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 23:00:45,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash 446718973, now seen corresponding path program 1 times [2024-06-27 23:00:45,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:45,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568358295] [2024-06-27 23:00:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:45,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:45,990 INFO 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 23:00:45,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:45,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568358295] [2024-06-27 23:00:45,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568358295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:45,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:45,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:45,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007477588] [2024-06-27 23:00:45,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:45,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:45,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:45,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:45,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:46,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:46,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:46,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:46,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:46,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:46,101 INFO L124 PetriNetUnfolderBase]: 96/203 cut-off events. [2024-06-27 23:00:46,101 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2024-06-27 23:00:46,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 203 events. 96/203 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 730 event pairs, 24 based on Foata normal form. 1/203 useless extension candidates. Maximal degree in co-relation 637. Up to 143 conditions per place. [2024-06-27 23:00:46,103 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 32 selfloop transitions, 13 changer transitions 0/50 dead transitions. [2024-06-27 23:00:46,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 316 flow [2024-06-27 23:00:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 23:00:46,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149425287356322 [2024-06-27 23:00:46,105 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 168 flow. Second operand 6 states and 107 transitions. [2024-06-27 23:00:46,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 316 flow [2024-06-27 23:00:46,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 295 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:46,109 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 198 flow [2024-06-27 23:00:46,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2024-06-27 23:00:46,110 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 18 predicate places. [2024-06-27 23:00:46,110 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 198 flow [2024-06-27 23:00:46,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:46,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:46,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:46,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:00:46,111 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 23:00:46,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:46,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1361247721, now seen corresponding path program 1 times [2024-06-27 23:00:46,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:46,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261128215] [2024-06-27 23:00:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:46,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:46,275 INFO 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 23:00:46,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:46,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261128215] [2024-06-27 23:00:46,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261128215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:46,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:46,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:46,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728800057] [2024-06-27 23:00:46,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:46,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:46,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:46,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:46,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:46,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:46,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:46,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:46,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:46,380 INFO L124 PetriNetUnfolderBase]: 102/213 cut-off events. [2024-06-27 23:00:46,381 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2024-06-27 23:00:46,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 213 events. 102/213 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 24 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 711. Up to 156 conditions per place. [2024-06-27 23:00:46,384 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 34 selfloop transitions, 14 changer transitions 0/53 dead transitions. [2024-06-27 23:00:46,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 362 flow [2024-06-27 23:00:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:46,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 23:00:46,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-06-27 23:00:46,386 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 198 flow. Second operand 6 states and 105 transitions. [2024-06-27 23:00:46,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 362 flow [2024-06-27 23:00:46,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 336 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:46,392 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 246 flow [2024-06-27 23:00:46,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=176, 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=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-27 23:00:46,395 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2024-06-27 23:00:46,396 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 246 flow [2024-06-27 23:00:46,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:46,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:46,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:46,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:00:46,397 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 23:00:46,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:46,397 INFO L85 PathProgramCache]: Analyzing trace with hash 446838943, now seen corresponding path program 2 times [2024-06-27 23:00:46,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:46,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061286830] [2024-06-27 23:00:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:46,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:46,620 INFO 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 23:00:46,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:46,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061286830] [2024-06-27 23:00:46,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061286830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:46,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:46,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:46,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422443583] [2024-06-27 23:00:46,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:46,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:46,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:46,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:46,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:46,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:46,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 246 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:46,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:46,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:46,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:46,750 INFO L124 PetriNetUnfolderBase]: 105/220 cut-off events. [2024-06-27 23:00:46,751 INFO L125 PetriNetUnfolderBase]: For 572/572 co-relation queries the response was YES. [2024-06-27 23:00:46,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795 conditions, 220 events. 105/220 cut-off events. For 572/572 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 807 event pairs, 23 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 770. Up to 170 conditions per place. [2024-06-27 23:00:46,753 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 37 selfloop transitions, 12 changer transitions 0/54 dead transitions. [2024-06-27 23:00:46,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 378 flow [2024-06-27 23:00:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 23:00:46,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-06-27 23:00:46,755 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 246 flow. Second operand 6 states and 102 transitions. [2024-06-27 23:00:46,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 378 flow [2024-06-27 23:00:46,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 367 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 23:00:46,759 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 278 flow [2024-06-27 23:00:46,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-06-27 23:00:46,761 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2024-06-27 23:00:46,761 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 278 flow [2024-06-27 23:00:46,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:46,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:46,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:46,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:00:46,762 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 23:00:46,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:46,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1917367571, now seen corresponding path program 2 times [2024-06-27 23:00:46,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:46,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133155648] [2024-06-27 23:00:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:46,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:46,961 INFO 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 23:00:46,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:46,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133155648] [2024-06-27 23:00:46,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133155648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:46,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:46,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:46,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687862404] [2024-06-27 23:00:46,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:46,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:46,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:46,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:46,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:46,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:46,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:46,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:46,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:47,065 INFO L124 PetriNetUnfolderBase]: 108/227 cut-off events. [2024-06-27 23:00:47,065 INFO L125 PetriNetUnfolderBase]: For 709/709 co-relation queries the response was YES. [2024-06-27 23:00:47,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 227 events. 108/227 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 857 event pairs, 24 based on Foata normal form. 1/227 useless extension candidates. Maximal degree in co-relation 839. Up to 172 conditions per place. [2024-06-27 23:00:47,067 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 37 selfloop transitions, 12 changer transitions 0/54 dead transitions. [2024-06-27 23:00:47,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 408 flow [2024-06-27 23:00:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:00:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:00:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-06-27 23:00:47,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6551724137931034 [2024-06-27 23:00:47,069 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 278 flow. Second operand 4 states and 76 transitions. [2024-06-27 23:00:47,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 408 flow [2024-06-27 23:00:47,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 379 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:47,074 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 301 flow [2024-06-27 23:00:47,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-27 23:00:47,075 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 26 predicate places. [2024-06-27 23:00:47,075 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 301 flow [2024-06-27 23:00:47,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:47,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:47,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:47,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:00:47,076 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 23:00:47,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:47,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1917130235, now seen corresponding path program 3 times [2024-06-27 23:00:47,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:47,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26990291] [2024-06-27 23:00:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:47,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:47,261 INFO 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 23:00:47,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:47,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26990291] [2024-06-27 23:00:47,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26990291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:47,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:47,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:47,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092935446] [2024-06-27 23:00:47,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:47,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:47,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:47,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:47,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:47,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:47,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 301 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:47,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:47,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:47,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:47,377 INFO L124 PetriNetUnfolderBase]: 106/224 cut-off events. [2024-06-27 23:00:47,377 INFO L125 PetriNetUnfolderBase]: For 851/851 co-relation queries the response was YES. [2024-06-27 23:00:47,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 224 events. 106/224 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 840 event pairs, 23 based on Foata normal form. 1/224 useless extension candidates. Maximal degree in co-relation 854. Up to 160 conditions per place. [2024-06-27 23:00:47,380 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 38 selfloop transitions, 15 changer transitions 0/58 dead transitions. [2024-06-27 23:00:47,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 58 transitions, 437 flow [2024-06-27 23:00:47,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 23:00:47,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6344827586206897 [2024-06-27 23:00:47,381 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 301 flow. Second operand 5 states and 92 transitions. [2024-06-27 23:00:47,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 58 transitions, 437 flow [2024-06-27 23:00:47,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 421 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:47,387 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 326 flow [2024-06-27 23:00:47,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=326, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-06-27 23:00:47,389 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 29 predicate places. [2024-06-27 23:00:47,389 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 326 flow [2024-06-27 23:00:47,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:47,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:47,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:47,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:00:47,390 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 23:00:47,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:47,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1917130421, now seen corresponding path program 3 times [2024-06-27 23:00:47,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:47,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327043297] [2024-06-27 23:00:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:47,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:47,559 INFO 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 23:00:47,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:47,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327043297] [2024-06-27 23:00:47,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327043297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:47,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:47,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:47,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178544998] [2024-06-27 23:00:47,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:47,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:47,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:47,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:47,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:47,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:47,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 326 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:47,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:47,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:47,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:47,655 INFO L124 PetriNetUnfolderBase]: 104/221 cut-off events. [2024-06-27 23:00:47,656 INFO L125 PetriNetUnfolderBase]: For 1014/1014 co-relation queries the response was YES. [2024-06-27 23:00:47,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 221 events. 104/221 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 833 event pairs, 24 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 880. Up to 160 conditions per place. [2024-06-27 23:00:47,658 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 34 selfloop transitions, 16 changer transitions 0/55 dead transitions. [2024-06-27 23:00:47,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 448 flow [2024-06-27 23:00:47,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 23:00:47,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-06-27 23:00:47,660 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 326 flow. Second operand 5 states and 90 transitions. [2024-06-27 23:00:47,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 448 flow [2024-06-27 23:00:47,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 414 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:47,665 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 332 flow [2024-06-27 23:00:47,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=5, PETRI_FLOW=332, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-06-27 23:00:47,666 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2024-06-27 23:00:47,667 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 332 flow [2024-06-27 23:00:47,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:47,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:47,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:47,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:00:47,668 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 23:00:47,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:47,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1917376499, now seen corresponding path program 1 times [2024-06-27 23:00:47,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:47,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915802028] [2024-06-27 23:00:47,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:47,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:47,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:47,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915802028] [2024-06-27 23:00:47,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915802028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:47,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:47,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:47,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251633022] [2024-06-27 23:00:47,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:47,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:47,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:47,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:47,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:47,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:47,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:47,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:47,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:47,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:47,922 INFO L124 PetriNetUnfolderBase]: 101/216 cut-off events. [2024-06-27 23:00:47,922 INFO L125 PetriNetUnfolderBase]: For 967/967 co-relation queries the response was YES. [2024-06-27 23:00:47,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 216 events. 101/216 cut-off events. For 967/967 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 790 event pairs, 23 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 855. Up to 173 conditions per place. [2024-06-27 23:00:47,925 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 41 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-06-27 23:00:47,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 440 flow [2024-06-27 23:00:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:00:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:00:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-06-27 23:00:47,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-06-27 23:00:47,926 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 332 flow. Second operand 4 states and 70 transitions. [2024-06-27 23:00:47,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 440 flow [2024-06-27 23:00:47,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 403 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:47,929 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 311 flow [2024-06-27 23:00:47,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-06-27 23:00:47,930 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2024-06-27 23:00:47,930 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 311 flow [2024-06-27 23:00:47,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:47,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:47,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:47,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:00:47,931 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 23:00:47,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash 747269371, now seen corresponding path program 1 times [2024-06-27 23:00:47,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:47,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807305599] [2024-06-27 23:00:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:47,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:48,069 INFO 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 23:00:48,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807305599] [2024-06-27 23:00:48,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807305599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:48,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:48,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:48,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225258418] [2024-06-27 23:00:48,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:48,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:48,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:48,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:48,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:48,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:48,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 311 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:48,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:48,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:48,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:48,199 INFO L124 PetriNetUnfolderBase]: 104/221 cut-off events. [2024-06-27 23:00:48,199 INFO L125 PetriNetUnfolderBase]: For 916/916 co-relation queries the response was YES. [2024-06-27 23:00:48,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 221 events. 104/221 cut-off events. For 916/916 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 826 event pairs, 22 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 850. Up to 127 conditions per place. [2024-06-27 23:00:48,201 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 36 selfloop transitions, 24 changer transitions 0/65 dead transitions. [2024-06-27 23:00:48,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 509 flow [2024-06-27 23:00:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 23:00:48,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6108374384236454 [2024-06-27 23:00:48,203 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 311 flow. Second operand 7 states and 124 transitions. [2024-06-27 23:00:48,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 509 flow [2024-06-27 23:00:48,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 497 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:48,207 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 380 flow [2024-06-27 23:00:48,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2024-06-27 23:00:48,208 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 35 predicate places. [2024-06-27 23:00:48,208 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 380 flow [2024-06-27 23:00:48,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:48,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:48,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:48,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:00:48,209 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 23:00:48,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:48,210 INFO L85 PathProgramCache]: Analyzing trace with hash 750988441, now seen corresponding path program 2 times [2024-06-27 23:00:48,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:48,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824571370] [2024-06-27 23:00:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:48,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:48,381 INFO 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 23:00:48,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:48,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824571370] [2024-06-27 23:00:48,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824571370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:48,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:48,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:48,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832682052] [2024-06-27 23:00:48,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:48,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:48,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:48,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:48,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:48,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 380 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:48,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:48,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:48,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:48,533 INFO L124 PetriNetUnfolderBase]: 112/238 cut-off events. [2024-06-27 23:00:48,534 INFO L125 PetriNetUnfolderBase]: For 1220/1220 co-relation queries the response was YES. [2024-06-27 23:00:48,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1019 conditions, 238 events. 112/238 cut-off events. For 1220/1220 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 924 event pairs, 22 based on Foata normal form. 1/238 useless extension candidates. Maximal degree in co-relation 989. Up to 163 conditions per place. [2024-06-27 23:00:48,536 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 40 selfloop transitions, 21 changer transitions 0/66 dead transitions. [2024-06-27 23:00:48,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 582 flow [2024-06-27 23:00:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 23:00:48,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5960591133004927 [2024-06-27 23:00:48,537 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 380 flow. Second operand 7 states and 121 transitions. [2024-06-27 23:00:48,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 582 flow [2024-06-27 23:00:48,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 548 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:48,542 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 429 flow [2024-06-27 23:00:48,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2024-06-27 23:00:48,543 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 39 predicate places. [2024-06-27 23:00:48,543 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 429 flow [2024-06-27 23:00:48,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:48,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:48,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:48,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:00:48,544 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 23:00:48,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash 967111523, now seen corresponding path program 3 times [2024-06-27 23:00:48,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:48,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437571684] [2024-06-27 23:00:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:48,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:48,689 INFO 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 23:00:48,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:48,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437571684] [2024-06-27 23:00:48,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437571684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:48,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:48,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:48,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538394863] [2024-06-27 23:00:48,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:48,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:48,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:48,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:48,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:48,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:48,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:48,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:48,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:48,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:48,844 INFO L124 PetriNetUnfolderBase]: 110/235 cut-off events. [2024-06-27 23:00:48,845 INFO L125 PetriNetUnfolderBase]: For 1333/1333 co-relation queries the response was YES. [2024-06-27 23:00:48,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 235 events. 110/235 cut-off events. For 1333/1333 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 918 event pairs, 22 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 1010. Up to 161 conditions per place. [2024-06-27 23:00:48,847 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 40 selfloop transitions, 22 changer transitions 0/67 dead transitions. [2024-06-27 23:00:48,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 67 transitions, 583 flow [2024-06-27 23:00:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:00:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:00:48,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 23:00:48,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5593869731800766 [2024-06-27 23:00:48,855 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 429 flow. Second operand 9 states and 146 transitions. [2024-06-27 23:00:48,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 67 transitions, 583 flow [2024-06-27 23:00:48,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 554 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:48,861 INFO L231 Difference]: Finished difference. Result has 73 places, 54 transitions, 449 flow [2024-06-27 23:00:48,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=449, PETRI_PLACES=73, PETRI_TRANSITIONS=54} [2024-06-27 23:00:48,862 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-06-27 23:00:48,862 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 54 transitions, 449 flow [2024-06-27 23:00:48,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:48,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:48,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:48,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:00:48,863 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 23:00:48,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:48,864 INFO L85 PathProgramCache]: Analyzing trace with hash -698498681, now seen corresponding path program 4 times [2024-06-27 23:00:48,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:48,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397737796] [2024-06-27 23:00:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:48,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:49,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:49,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397737796] [2024-06-27 23:00:49,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397737796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:49,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:49,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:49,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290040823] [2024-06-27 23:00:49,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:49,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:49,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:49,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:49,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:49,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:49,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 54 transitions, 449 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:49,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:49,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:49,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:49,135 INFO L124 PetriNetUnfolderBase]: 118/252 cut-off events. [2024-06-27 23:00:49,135 INFO L125 PetriNetUnfolderBase]: For 1607/1607 co-relation queries the response was YES. [2024-06-27 23:00:49,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1165 conditions, 252 events. 118/252 cut-off events. For 1607/1607 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1011 event pairs, 22 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 1131. Up to 151 conditions per place. [2024-06-27 23:00:49,138 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 38 selfloop transitions, 32 changer transitions 0/75 dead transitions. [2024-06-27 23:00:49,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 713 flow [2024-06-27 23:00:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 23:00:49,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5991379310344828 [2024-06-27 23:00:49,140 INFO L175 Difference]: Start difference. First operand has 73 places, 54 transitions, 449 flow. Second operand 8 states and 139 transitions. [2024-06-27 23:00:49,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 713 flow [2024-06-27 23:00:49,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 664 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 23:00:49,146 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 508 flow [2024-06-27 23:00:49,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=508, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-06-27 23:00:49,147 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-06-27 23:00:49,147 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 508 flow [2024-06-27 23:00:49,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:49,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:49,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:49,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:00:49,148 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 23:00:49,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:49,148 INFO L85 PathProgramCache]: Analyzing trace with hash -82724201, now seen corresponding path program 5 times [2024-06-27 23:00:49,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:49,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62725603] [2024-06-27 23:00:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:49,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:49,288 INFO 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 23:00:49,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:49,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62725603] [2024-06-27 23:00:49,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62725603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:49,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:49,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:49,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495721640] [2024-06-27 23:00:49,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:49,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:49,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:49,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:49,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 508 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:49,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:49,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:49,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:49,408 INFO L124 PetriNetUnfolderBase]: 116/249 cut-off events. [2024-06-27 23:00:49,408 INFO L125 PetriNetUnfolderBase]: For 1773/1773 co-relation queries the response was YES. [2024-06-27 23:00:49,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 249 events. 116/249 cut-off events. For 1773/1773 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 994 event pairs, 22 based on Foata normal form. 1/249 useless extension candidates. Maximal degree in co-relation 1148. Up to 149 conditions per place. [2024-06-27 23:00:49,411 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 37 selfloop transitions, 30 changer transitions 0/72 dead transitions. [2024-06-27 23:00:49,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 702 flow [2024-06-27 23:00:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 23:00:49,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2024-06-27 23:00:49,412 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 508 flow. Second operand 6 states and 110 transitions. [2024-06-27 23:00:49,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 702 flow [2024-06-27 23:00:49,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 623 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:49,418 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 499 flow [2024-06-27 23:00:49,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=499, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-06-27 23:00:49,419 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-06-27 23:00:49,419 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 499 flow [2024-06-27 23:00:49,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:49,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:49,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:49,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:00:49,420 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 23:00:49,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:49,421 INFO L85 PathProgramCache]: Analyzing trace with hash -82516811, now seen corresponding path program 6 times [2024-06-27 23:00:49,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:49,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386061646] [2024-06-27 23:00:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:49,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:49,579 INFO 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 23:00:49,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:49,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386061646] [2024-06-27 23:00:49,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386061646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:49,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:49,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:49,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767967766] [2024-06-27 23:00:49,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:49,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:49,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:49,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:49,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:49,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:49,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 499 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:49,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:49,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:49,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:49,695 INFO L124 PetriNetUnfolderBase]: 114/246 cut-off events. [2024-06-27 23:00:49,696 INFO L125 PetriNetUnfolderBase]: For 1649/1649 co-relation queries the response was YES. [2024-06-27 23:00:49,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 246 events. 114/246 cut-off events. For 1649/1649 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 977 event pairs, 22 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 1112. Up to 171 conditions per place. [2024-06-27 23:00:49,698 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 48 selfloop transitions, 17 changer transitions 0/70 dead transitions. [2024-06-27 23:00:49,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 70 transitions, 659 flow [2024-06-27 23:00:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-27 23:00:49,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6551724137931034 [2024-06-27 23:00:49,700 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 499 flow. Second operand 5 states and 95 transitions. [2024-06-27 23:00:49,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 70 transitions, 659 flow [2024-06-27 23:00:49,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 70 transitions, 592 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:49,705 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 477 flow [2024-06-27 23:00:49,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=477, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2024-06-27 23:00:49,706 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2024-06-27 23:00:49,706 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 477 flow [2024-06-27 23:00:49,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:49,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:49,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:49,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:00:49,707 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 23:00:49,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:49,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1687652730, now seen corresponding path program 1 times [2024-06-27 23:00:49,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:49,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775589347] [2024-06-27 23:00:49,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:49,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:49,868 INFO 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 23:00:49,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:49,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775589347] [2024-06-27 23:00:49,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775589347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:49,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:49,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:49,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102037250] [2024-06-27 23:00:49,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:49,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:49,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:49,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:49,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:49,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:49,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:49,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:50,007 INFO L124 PetriNetUnfolderBase]: 118/254 cut-off events. [2024-06-27 23:00:50,007 INFO L125 PetriNetUnfolderBase]: For 1702/1702 co-relation queries the response was YES. [2024-06-27 23:00:50,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 254 events. 118/254 cut-off events. For 1702/1702 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1018 event pairs, 8 based on Foata normal form. 2/255 useless extension candidates. Maximal degree in co-relation 1115. Up to 140 conditions per place. [2024-06-27 23:00:50,010 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 52 selfloop transitions, 19 changer transitions 0/76 dead transitions. [2024-06-27 23:00:50,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 689 flow [2024-06-27 23:00:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 23:00:50,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911330049261084 [2024-06-27 23:00:50,011 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 477 flow. Second operand 7 states and 120 transitions. [2024-06-27 23:00:50,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 689 flow [2024-06-27 23:00:50,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 640 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:50,018 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 474 flow [2024-06-27 23:00:50,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=474, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-06-27 23:00:50,019 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 46 predicate places. [2024-06-27 23:00:50,019 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 474 flow [2024-06-27 23:00:50,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:50,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:50,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:50,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:00:50,020 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 23:00:50,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:50,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1687713180, now seen corresponding path program 2 times [2024-06-27 23:00:50,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:50,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258235699] [2024-06-27 23:00:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:50,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:50,189 INFO 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 23:00:50,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:50,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258235699] [2024-06-27 23:00:50,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258235699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:50,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:50,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:50,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849124453] [2024-06-27 23:00:50,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:50,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:50,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:50,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:50,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:50,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:50,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 474 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:50,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:50,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:50,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:50,319 INFO L124 PetriNetUnfolderBase]: 122/262 cut-off events. [2024-06-27 23:00:50,320 INFO L125 PetriNetUnfolderBase]: For 1860/1860 co-relation queries the response was YES. [2024-06-27 23:00:50,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 262 events. 122/262 cut-off events. For 1860/1860 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1071 event pairs, 19 based on Foata normal form. 2/263 useless extension candidates. Maximal degree in co-relation 1153. Up to 181 conditions per place. [2024-06-27 23:00:50,322 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 52 selfloop transitions, 18 changer transitions 0/75 dead transitions. [2024-06-27 23:00:50,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 656 flow [2024-06-27 23:00:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 23:00:50,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911330049261084 [2024-06-27 23:00:50,324 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 474 flow. Second operand 7 states and 120 transitions. [2024-06-27 23:00:50,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 656 flow [2024-06-27 23:00:50,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 619 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:50,330 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 485 flow [2024-06-27 23:00:50,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=485, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2024-06-27 23:00:50,331 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 49 predicate places. [2024-06-27 23:00:50,331 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 485 flow [2024-06-27 23:00:50,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:50,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:50,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:50,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:00:50,332 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 23:00:50,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash -84491170, now seen corresponding path program 3 times [2024-06-27 23:00:50,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:50,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839765040] [2024-06-27 23:00:50,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:50,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:50,503 INFO 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 23:00:50,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:50,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839765040] [2024-06-27 23:00:50,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839765040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:50,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:50,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:50,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439508266] [2024-06-27 23:00:50,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:50,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:50,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:50,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:50,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:50,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:50,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 485 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:50,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:50,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:50,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:50,645 INFO L124 PetriNetUnfolderBase]: 126/270 cut-off events. [2024-06-27 23:00:50,646 INFO L125 PetriNetUnfolderBase]: For 2039/2039 co-relation queries the response was YES. [2024-06-27 23:00:50,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 270 events. 126/270 cut-off events. For 2039/2039 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1110 event pairs, 19 based on Foata normal form. 2/271 useless extension candidates. Maximal degree in co-relation 1184. Up to 204 conditions per place. [2024-06-27 23:00:50,648 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 55 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-27 23:00:50,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 73 transitions, 654 flow [2024-06-27 23:00:50,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:50,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 23:00:50,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 23:00:50,650 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 485 flow. Second operand 7 states and 116 transitions. [2024-06-27 23:00:50,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 73 transitions, 654 flow [2024-06-27 23:00:50,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 73 transitions, 618 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:50,656 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 486 flow [2024-06-27 23:00:50,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=486, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2024-06-27 23:00:50,657 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2024-06-27 23:00:50,657 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 486 flow [2024-06-27 23:00:50,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:50,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:50,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:50,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:00:50,658 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 23:00:50,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:50,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1805985558, now seen corresponding path program 1 times [2024-06-27 23:00:50,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:50,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359098837] [2024-06-27 23:00:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:50,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:50,800 INFO 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 23:00:50,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:50,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359098837] [2024-06-27 23:00:50,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359098837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:50,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:50,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:50,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847500010] [2024-06-27 23:00:50,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:50,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:50,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:50,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:50,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:50,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:50,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 486 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:50,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:50,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:50,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:50,934 INFO L124 PetriNetUnfolderBase]: 130/278 cut-off events. [2024-06-27 23:00:50,934 INFO L125 PetriNetUnfolderBase]: For 2232/2232 co-relation queries the response was YES. [2024-06-27 23:00:50,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 278 events. 130/278 cut-off events. For 2232/2232 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1151 event pairs, 20 based on Foata normal form. 2/279 useless extension candidates. Maximal degree in co-relation 1213. Up to 203 conditions per place. [2024-06-27 23:00:50,937 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 52 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-06-27 23:00:50,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 658 flow [2024-06-27 23:00:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 23:00:50,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5812807881773399 [2024-06-27 23:00:50,938 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 486 flow. Second operand 7 states and 118 transitions. [2024-06-27 23:00:50,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 658 flow [2024-06-27 23:00:50,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 74 transitions, 632 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:50,947 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 506 flow [2024-06-27 23:00:50,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2024-06-27 23:00:50,948 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-27 23:00:50,948 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 506 flow [2024-06-27 23:00:50,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:50,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:50,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:50,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:00:50,949 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 23:00:50,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:50,949 INFO L85 PathProgramCache]: Analyzing trace with hash -178799942, now seen corresponding path program 4 times [2024-06-27 23:00:50,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:50,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556626954] [2024-06-27 23:00:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:50,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:51,096 INFO 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 23:00:51,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:51,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556626954] [2024-06-27 23:00:51,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556626954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:51,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:51,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:51,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965069046] [2024-06-27 23:00:51,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:51,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:51,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:51,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:51,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:51,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:51,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 506 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:51,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:51,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:51,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:51,248 INFO L124 PetriNetUnfolderBase]: 127/273 cut-off events. [2024-06-27 23:00:51,248 INFO L125 PetriNetUnfolderBase]: For 2204/2204 co-relation queries the response was YES. [2024-06-27 23:00:51,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1231 conditions, 273 events. 127/273 cut-off events. For 2204/2204 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1130 event pairs, 7 based on Foata normal form. 2/274 useless extension candidates. Maximal degree in co-relation 1193. Up to 171 conditions per place. [2024-06-27 23:00:51,251 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 53 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-27 23:00:51,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 76 transitions, 682 flow [2024-06-27 23:00:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 23:00:51,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-06-27 23:00:51,253 INFO L175 Difference]: Start difference. First operand has 81 places, 62 transitions, 506 flow. Second operand 6 states and 106 transitions. [2024-06-27 23:00:51,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 76 transitions, 682 flow [2024-06-27 23:00:51,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 76 transitions, 646 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:51,265 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 514 flow [2024-06-27 23:00:51,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2024-06-27 23:00:51,266 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-06-27 23:00:51,266 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 514 flow [2024-06-27 23:00:51,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:51,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:51,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:51,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:00:51,267 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 23:00:51,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:51,268 INFO L85 PathProgramCache]: Analyzing trace with hash -178615244, now seen corresponding path program 2 times [2024-06-27 23:00:51,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:51,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487442686] [2024-06-27 23:00:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:51,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:51,413 INFO 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 23:00:51,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:51,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487442686] [2024-06-27 23:00:51,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487442686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:51,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:51,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:51,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230082456] [2024-06-27 23:00:51,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:51,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:51,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:51,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:51,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:51,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:51,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:51,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:51,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:51,517 INFO L124 PetriNetUnfolderBase]: 131/281 cut-off events. [2024-06-27 23:00:51,517 INFO L125 PetriNetUnfolderBase]: For 2540/2540 co-relation queries the response was YES. [2024-06-27 23:00:51,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 281 events. 131/281 cut-off events. For 2540/2540 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1179 event pairs, 19 based on Foata normal form. 2/282 useless extension candidates. Maximal degree in co-relation 1246. Up to 200 conditions per place. [2024-06-27 23:00:51,520 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 51 selfloop transitions, 18 changer transitions 0/74 dead transitions. [2024-06-27 23:00:51,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 74 transitions, 686 flow [2024-06-27 23:00:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 23:00:51,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977011494252874 [2024-06-27 23:00:51,521 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 514 flow. Second operand 6 states and 104 transitions. [2024-06-27 23:00:51,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 74 transitions, 686 flow [2024-06-27 23:00:51,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 74 transitions, 640 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:51,530 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 520 flow [2024-06-27 23:00:51,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=520, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2024-06-27 23:00:51,531 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-06-27 23:00:51,531 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 520 flow [2024-06-27 23:00:51,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:51,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:51,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:51,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:00:51,532 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 23:00:51,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash 57560116, now seen corresponding path program 3 times [2024-06-27 23:00:51,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:51,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784931160] [2024-06-27 23:00:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:51,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:51,675 INFO 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 23:00:51,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:51,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784931160] [2024-06-27 23:00:51,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784931160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:51,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:51,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:51,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120978587] [2024-06-27 23:00:51,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:51,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:51,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:51,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:51,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:51,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:51,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:51,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:51,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:51,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:51,793 INFO L124 PetriNetUnfolderBase]: 135/289 cut-off events. [2024-06-27 23:00:51,794 INFO L125 PetriNetUnfolderBase]: For 2294/2294 co-relation queries the response was YES. [2024-06-27 23:00:51,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1306 conditions, 289 events. 135/289 cut-off events. For 2294/2294 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1225 event pairs, 21 based on Foata normal form. 2/290 useless extension candidates. Maximal degree in co-relation 1267. Up to 220 conditions per place. [2024-06-27 23:00:51,796 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 56 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-27 23:00:51,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 74 transitions, 692 flow [2024-06-27 23:00:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 23:00:51,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-06-27 23:00:51,798 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 520 flow. Second operand 5 states and 90 transitions. [2024-06-27 23:00:51,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 74 transitions, 692 flow [2024-06-27 23:00:51,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 74 transitions, 650 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:51,806 INFO L231 Difference]: Finished difference. Result has 83 places, 64 transitions, 520 flow [2024-06-27 23:00:51,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=83, PETRI_TRANSITIONS=64} [2024-06-27 23:00:51,806 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 55 predicate places. [2024-06-27 23:00:51,807 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 64 transitions, 520 flow [2024-06-27 23:00:51,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:51,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:51,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:51,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:00:51,807 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 23:00:51,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash 57856786, now seen corresponding path program 4 times [2024-06-27 23:00:51,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:51,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708507992] [2024-06-27 23:00:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:51,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:51,977 INFO 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 23:00:51,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:51,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708507992] [2024-06-27 23:00:51,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708507992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:51,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:51,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:51,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584771104] [2024-06-27 23:00:51,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:51,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:51,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:51,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:52,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:52,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 64 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:52,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:52,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:52,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:52,125 INFO L124 PetriNetUnfolderBase]: 132/284 cut-off events. [2024-06-27 23:00:52,126 INFO L125 PetriNetUnfolderBase]: For 1963/1963 co-relation queries the response was YES. [2024-06-27 23:00:52,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 284 events. 132/284 cut-off events. For 1963/1963 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1196 event pairs, 18 based on Foata normal form. 2/285 useless extension candidates. Maximal degree in co-relation 1199. Up to 201 conditions per place. [2024-06-27 23:00:52,128 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 56 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2024-06-27 23:00:52,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 76 transitions, 690 flow [2024-06-27 23:00:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 23:00:52,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977011494252874 [2024-06-27 23:00:52,130 INFO L175 Difference]: Start difference. First operand has 83 places, 64 transitions, 520 flow. Second operand 6 states and 104 transitions. [2024-06-27 23:00:52,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 76 transitions, 690 flow [2024-06-27 23:00:52,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 76 transitions, 660 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:52,140 INFO L231 Difference]: Finished difference. Result has 86 places, 64 transitions, 524 flow [2024-06-27 23:00:52,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=524, PETRI_PLACES=86, PETRI_TRANSITIONS=64} [2024-06-27 23:00:52,141 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-27 23:00:52,141 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 64 transitions, 524 flow [2024-06-27 23:00:52,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 23:00:52,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:52,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:52,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:00:52,142 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 23:00:52,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:52,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1986850406, now seen corresponding path program 1 times [2024-06-27 23:00:52,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:52,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166383597] [2024-06-27 23:00:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:52,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:52,296 INFO 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 23:00:52,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:52,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166383597] [2024-06-27 23:00:52,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166383597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:52,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:52,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:52,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823233809] [2024-06-27 23:00:52,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:52,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:52,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:52,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:52,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:52,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:52,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 64 transitions, 524 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:52,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:52,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:52,459 INFO L124 PetriNetUnfolderBase]: 155/341 cut-off events. [2024-06-27 23:00:52,459 INFO L125 PetriNetUnfolderBase]: For 3780/3780 co-relation queries the response was YES. [2024-06-27 23:00:52,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1492 conditions, 341 events. 155/341 cut-off events. For 3780/3780 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1532 event pairs, 29 based on Foata normal form. 6/346 useless extension candidates. Maximal degree in co-relation 1451. Up to 118 conditions per place. [2024-06-27 23:00:52,463 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 41 selfloop transitions, 29 changer transitions 12/87 dead transitions. [2024-06-27 23:00:52,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 786 flow [2024-06-27 23:00:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 23:00:52,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-06-27 23:00:52,464 INFO L175 Difference]: Start difference. First operand has 86 places, 64 transitions, 524 flow. Second operand 8 states and 140 transitions. [2024-06-27 23:00:52,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 786 flow [2024-06-27 23:00:52,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 736 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:52,475 INFO L231 Difference]: Finished difference. Result has 89 places, 61 transitions, 510 flow [2024-06-27 23:00:52,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=510, PETRI_PLACES=89, PETRI_TRANSITIONS=61} [2024-06-27 23:00:52,477 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2024-06-27 23:00:52,477 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 61 transitions, 510 flow [2024-06-27 23:00:52,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:52,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:52,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:00:52,478 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 23:00:52,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:52,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1984972736, now seen corresponding path program 2 times [2024-06-27 23:00:52,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:52,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949492225] [2024-06-27 23:00:52,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:52,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:52,659 INFO 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 23:00:52,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:52,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949492225] [2024-06-27 23:00:52,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949492225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:52,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:52,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:52,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252998993] [2024-06-27 23:00:52,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:52,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:52,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:52,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:52,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:52,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:52,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 61 transitions, 510 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:52,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:52,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:52,796 INFO L124 PetriNetUnfolderBase]: 143/319 cut-off events. [2024-06-27 23:00:52,797 INFO L125 PetriNetUnfolderBase]: For 4487/4487 co-relation queries the response was YES. [2024-06-27 23:00:52,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 319 events. 143/319 cut-off events. For 4487/4487 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1430 event pairs, 35 based on Foata normal form. 8/326 useless extension candidates. Maximal degree in co-relation 1375. Up to 178 conditions per place. [2024-06-27 23:00:52,800 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 28 changer transitions 9/77 dead transitions. [2024-06-27 23:00:52,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 77 transitions, 700 flow [2024-06-27 23:00:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 23:00:52,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818965517241379 [2024-06-27 23:00:52,801 INFO L175 Difference]: Start difference. First operand has 89 places, 61 transitions, 510 flow. Second operand 8 states and 135 transitions. [2024-06-27 23:00:52,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 77 transitions, 700 flow [2024-06-27 23:00:52,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 77 transitions, 636 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:52,812 INFO L231 Difference]: Finished difference. Result has 86 places, 58 transitions, 487 flow [2024-06-27 23:00:52,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=487, PETRI_PLACES=86, PETRI_TRANSITIONS=58} [2024-06-27 23:00:52,812 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-27 23:00:52,813 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 58 transitions, 487 flow [2024-06-27 23:00:52,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:52,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:52,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:00:52,813 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 23:00:52,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:52,814 INFO L85 PathProgramCache]: Analyzing trace with hash 866193436, now seen corresponding path program 3 times [2024-06-27 23:00:52,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:52,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943130660] [2024-06-27 23:00:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:52,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:52,950 INFO 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 23:00:52,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:52,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943130660] [2024-06-27 23:00:52,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943130660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:52,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:52,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:52,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028660263] [2024-06-27 23:00:52,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:52,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:52,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:52,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:52,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:52,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:52,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 58 transitions, 487 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:52,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:52,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:53,072 INFO L124 PetriNetUnfolderBase]: 134/302 cut-off events. [2024-06-27 23:00:53,072 INFO L125 PetriNetUnfolderBase]: For 3364/3364 co-relation queries the response was YES. [2024-06-27 23:00:53,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 302 events. 134/302 cut-off events. For 3364/3364 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1320 event pairs, 29 based on Foata normal form. 6/307 useless extension candidates. Maximal degree in co-relation 1284. Up to 168 conditions per place. [2024-06-27 23:00:53,074 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 30 selfloop transitions, 25 changer transitions 14/74 dead transitions. [2024-06-27 23:00:53,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 665 flow [2024-06-27 23:00:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 23:00:53,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5732758620689655 [2024-06-27 23:00:53,076 INFO L175 Difference]: Start difference. First operand has 86 places, 58 transitions, 487 flow. Second operand 8 states and 133 transitions. [2024-06-27 23:00:53,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 665 flow [2024-06-27 23:00:53,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 605 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:53,084 INFO L231 Difference]: Finished difference. Result has 84 places, 54 transitions, 441 flow [2024-06-27 23:00:53,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=441, PETRI_PLACES=84, PETRI_TRANSITIONS=54} [2024-06-27 23:00:53,088 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-06-27 23:00:53,088 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 54 transitions, 441 flow [2024-06-27 23:00:53,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:53,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:53,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:00:53,089 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 23:00:53,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash -762257502, now seen corresponding path program 4 times [2024-06-27 23:00:53,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:53,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457413408] [2024-06-27 23:00:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:53,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:53,244 INFO 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 23:00:53,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:53,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457413408] [2024-06-27 23:00:53,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457413408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:53,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:53,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:53,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283942219] [2024-06-27 23:00:53,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:53,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:53,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:53,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:53,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:53,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:53,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 54 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:53,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:53,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:53,405 INFO L124 PetriNetUnfolderBase]: 127/279 cut-off events. [2024-06-27 23:00:53,406 INFO L125 PetriNetUnfolderBase]: For 3291/3291 co-relation queries the response was YES. [2024-06-27 23:00:53,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1212 conditions, 279 events. 127/279 cut-off events. For 3291/3291 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1208 event pairs, 33 based on Foata normal form. 8/286 useless extension candidates. Maximal degree in co-relation 1173. Up to 176 conditions per place. [2024-06-27 23:00:53,408 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 37 selfloop transitions, 18 changer transitions 9/69 dead transitions. [2024-06-27 23:00:53,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 69 transitions, 609 flow [2024-06-27 23:00:53,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:00:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:00:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 23:00:53,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2024-06-27 23:00:53,410 INFO L175 Difference]: Start difference. First operand has 84 places, 54 transitions, 441 flow. Second operand 10 states and 158 transitions. [2024-06-27 23:00:53,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 69 transitions, 609 flow [2024-06-27 23:00:53,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 69 transitions, 549 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:53,418 INFO L231 Difference]: Finished difference. Result has 81 places, 51 transitions, 396 flow [2024-06-27 23:00:53,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=396, PETRI_PLACES=81, PETRI_TRANSITIONS=51} [2024-06-27 23:00:53,420 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-27 23:00:53,420 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 51 transitions, 396 flow [2024-06-27 23:00:53,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:53,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:53,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:00:53,421 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 23:00:53,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:53,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1681467076, now seen corresponding path program 1 times [2024-06-27 23:00:53,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:53,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863192719] [2024-06-27 23:00:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:53,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:53,602 INFO 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 23:00:53,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:53,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863192719] [2024-06-27 23:00:53,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863192719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:53,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:53,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:53,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168025202] [2024-06-27 23:00:53,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:53,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:53,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:53,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:53,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:53,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:53,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 51 transitions, 396 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:53,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:53,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:53,758 INFO L124 PetriNetUnfolderBase]: 140/314 cut-off events. [2024-06-27 23:00:53,758 INFO L125 PetriNetUnfolderBase]: For 3189/3189 co-relation queries the response was YES. [2024-06-27 23:00:53,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 314 events. 140/314 cut-off events. For 3189/3189 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1443 event pairs, 43 based on Foata normal form. 6/319 useless extension candidates. Maximal degree in co-relation 1299. Up to 162 conditions per place. [2024-06-27 23:00:53,761 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 41 selfloop transitions, 16 changer transitions 8/70 dead transitions. [2024-06-27 23:00:53,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 70 transitions, 606 flow [2024-06-27 23:00:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:00:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:00:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 23:00:53,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2024-06-27 23:00:53,763 INFO L175 Difference]: Start difference. First operand has 81 places, 51 transitions, 396 flow. Second operand 10 states and 160 transitions. [2024-06-27 23:00:53,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 70 transitions, 606 flow [2024-06-27 23:00:53,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 70 transitions, 562 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 23:00:53,770 INFO L231 Difference]: Finished difference. Result has 80 places, 48 transitions, 363 flow [2024-06-27 23:00:53,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=363, PETRI_PLACES=80, PETRI_TRANSITIONS=48} [2024-06-27 23:00:53,771 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 52 predicate places. [2024-06-27 23:00:53,771 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 48 transitions, 363 flow [2024-06-27 23:00:53,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:53,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:53,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:00:53,772 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 23:00:53,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1675895446, now seen corresponding path program 2 times [2024-06-27 23:00:53,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:53,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345174499] [2024-06-27 23:00:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:53,930 INFO 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 23:00:53,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:53,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345174499] [2024-06-27 23:00:53,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345174499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:53,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:53,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274051149] [2024-06-27 23:00:53,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:53,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:53,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:53,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:53,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:53,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 48 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:53,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:53,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:54,047 INFO L124 PetriNetUnfolderBase]: 115/257 cut-off events. [2024-06-27 23:00:54,047 INFO L125 PetriNetUnfolderBase]: For 2563/2563 co-relation queries the response was YES. [2024-06-27 23:00:54,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 257 events. 115/257 cut-off events. For 2563/2563 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1088 event pairs, 35 based on Foata normal form. 8/264 useless extension candidates. Maximal degree in co-relation 1027. Up to 162 conditions per place. [2024-06-27 23:00:54,049 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 34 selfloop transitions, 13 changer transitions 9/61 dead transitions. [2024-06-27 23:00:54,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 61 transitions, 511 flow [2024-06-27 23:00:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 23:00:54,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560344827586207 [2024-06-27 23:00:54,050 INFO L175 Difference]: Start difference. First operand has 80 places, 48 transitions, 363 flow. Second operand 8 states and 129 transitions. [2024-06-27 23:00:54,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 61 transitions, 511 flow [2024-06-27 23:00:54,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 61 transitions, 468 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 23:00:54,057 INFO L231 Difference]: Finished difference. Result has 75 places, 45 transitions, 321 flow [2024-06-27 23:00:54,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=321, PETRI_PLACES=75, PETRI_TRANSITIONS=45} [2024-06-27 23:00:54,058 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 47 predicate places. [2024-06-27 23:00:54,058 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 45 transitions, 321 flow [2024-06-27 23:00:54,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:54,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:54,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:00:54,059 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 23:00:54,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1675741624, now seen corresponding path program 5 times [2024-06-27 23:00:54,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:54,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000602134] [2024-06-27 23:00:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:54,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:54,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000602134] [2024-06-27 23:00:54,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000602134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:54,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:54,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:54,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917936611] [2024-06-27 23:00:54,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:54,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:54,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:54,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:54,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:54,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:54,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 45 transitions, 321 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:54,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:54,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:54,400 INFO L124 PetriNetUnfolderBase]: 106/242 cut-off events. [2024-06-27 23:00:54,400 INFO L125 PetriNetUnfolderBase]: For 2289/2289 co-relation queries the response was YES. [2024-06-27 23:00:54,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 242 events. 106/242 cut-off events. For 2289/2289 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 982 event pairs, 29 based on Foata normal form. 6/247 useless extension candidates. Maximal degree in co-relation 946. Up to 152 conditions per place. [2024-06-27 23:00:54,402 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 28 selfloop transitions, 9 changer transitions 16/58 dead transitions. [2024-06-27 23:00:54,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 58 transitions, 459 flow [2024-06-27 23:00:54,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 23:00:54,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474137931034483 [2024-06-27 23:00:54,404 INFO L175 Difference]: Start difference. First operand has 75 places, 45 transitions, 321 flow. Second operand 8 states and 127 transitions. [2024-06-27 23:00:54,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 58 transitions, 459 flow [2024-06-27 23:00:54,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 58 transitions, 419 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:54,410 INFO L231 Difference]: Finished difference. Result has 72 places, 40 transitions, 256 flow [2024-06-27 23:00:54,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=256, PETRI_PLACES=72, PETRI_TRANSITIONS=40} [2024-06-27 23:00:54,411 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2024-06-27 23:00:54,411 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 40 transitions, 256 flow [2024-06-27 23:00:54,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:54,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:54,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:00:54,412 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 23:00:54,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:54,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1527654248, now seen corresponding path program 3 times [2024-06-27 23:00:54,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:54,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650200372] [2024-06-27 23:00:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:54,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:54,582 INFO 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 23:00:54,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:54,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650200372] [2024-06-27 23:00:54,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650200372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:54,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:54,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:54,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979766870] [2024-06-27 23:00:54,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:54,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:54,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:54,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:54,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:54,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:54,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 40 transitions, 256 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:54,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:54,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:54,745 INFO L124 PetriNetUnfolderBase]: 98/219 cut-off events. [2024-06-27 23:00:54,746 INFO L125 PetriNetUnfolderBase]: For 2335/2335 co-relation queries the response was YES. [2024-06-27 23:00:54,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 219 events. 98/219 cut-off events. For 2335/2335 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 897 event pairs, 33 based on Foata normal form. 8/227 useless extension candidates. Maximal degree in co-relation 826. Up to 139 conditions per place. [2024-06-27 23:00:54,747 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 27 selfloop transitions, 10 changer transitions 6/48 dead transitions. [2024-06-27 23:00:54,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 48 transitions, 366 flow [2024-06-27 23:00:54,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-27 23:00:54,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-06-27 23:00:54,749 INFO L175 Difference]: Start difference. First operand has 72 places, 40 transitions, 256 flow. Second operand 6 states and 99 transitions. [2024-06-27 23:00:54,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 48 transitions, 366 flow [2024-06-27 23:00:54,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 48 transitions, 335 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 23:00:54,753 INFO L231 Difference]: Finished difference. Result has 62 places, 37 transitions, 228 flow [2024-06-27 23:00:54,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=62, PETRI_TRANSITIONS=37} [2024-06-27 23:00:54,754 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 34 predicate places. [2024-06-27 23:00:54,754 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 37 transitions, 228 flow [2024-06-27 23:00:54,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:54,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:54,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:00:54,755 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 23:00:54,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:54,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1784364008, now seen corresponding path program 4 times [2024-06-27 23:00:54,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:54,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644545749] [2024-06-27 23:00:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:54,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:54,903 INFO 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 23:00:54,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:54,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644545749] [2024-06-27 23:00:54,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644545749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:54,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:54,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:54,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954676929] [2024-06-27 23:00:54,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:54,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:54,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:54,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:54,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:54,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:54,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 37 transitions, 228 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:54,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:54,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:55,051 INFO L124 PetriNetUnfolderBase]: 89/206 cut-off events. [2024-06-27 23:00:55,051 INFO L125 PetriNetUnfolderBase]: For 1844/1844 co-relation queries the response was YES. [2024-06-27 23:00:55,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 206 events. 89/206 cut-off events. For 1844/1844 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 819 event pairs, 29 based on Foata normal form. 6/212 useless extension candidates. Maximal degree in co-relation 754. Up to 129 conditions per place. [2024-06-27 23:00:55,053 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 26 selfloop transitions, 7 changer transitions 8/46 dead transitions. [2024-06-27 23:00:55,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 46 transitions, 332 flow [2024-06-27 23:00:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-27 23:00:55,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-06-27 23:00:55,054 INFO L175 Difference]: Start difference. First operand has 62 places, 37 transitions, 228 flow. Second operand 6 states and 99 transitions. [2024-06-27 23:00:55,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 46 transitions, 332 flow [2024-06-27 23:00:55,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 46 transitions, 297 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 23:00:55,058 INFO L231 Difference]: Finished difference. Result has 59 places, 34 transitions, 192 flow [2024-06-27 23:00:55,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=59, PETRI_TRANSITIONS=34} [2024-06-27 23:00:55,059 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 31 predicate places. [2024-06-27 23:00:55,059 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 34 transitions, 192 flow [2024-06-27 23:00:55,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:55,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:55,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:00:55,059 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 23:00:55,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1981605324, now seen corresponding path program 5 times [2024-06-27 23:00:55,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:55,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297642655] [2024-06-27 23:00:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:55,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:55,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:55,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297642655] [2024-06-27 23:00:55,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297642655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:55,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:55,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:55,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520156134] [2024-06-27 23:00:55,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:55,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:55,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:55,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:55,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:55,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 34 transitions, 192 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:55,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:55,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:55,363 INFO L124 PetriNetUnfolderBase]: 82/193 cut-off events. [2024-06-27 23:00:55,363 INFO L125 PetriNetUnfolderBase]: For 1805/1805 co-relation queries the response was YES. [2024-06-27 23:00:55,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 193 events. 82/193 cut-off events. For 1805/1805 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 752 event pairs, 27 based on Foata normal form. 6/199 useless extension candidates. Maximal degree in co-relation 690. Up to 111 conditions per place. [2024-06-27 23:00:55,364 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 23 selfloop transitions, 6 changer transitions 11/45 dead transitions. [2024-06-27 23:00:55,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 45 transitions, 298 flow [2024-06-27 23:00:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 23:00:55,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467980295566502 [2024-06-27 23:00:55,366 INFO L175 Difference]: Start difference. First operand has 59 places, 34 transitions, 192 flow. Second operand 7 states and 111 transitions. [2024-06-27 23:00:55,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 45 transitions, 298 flow [2024-06-27 23:00:55,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 45 transitions, 274 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 23:00:55,369 INFO L231 Difference]: Finished difference. Result has 56 places, 30 transitions, 164 flow [2024-06-27 23:00:55,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=164, PETRI_PLACES=56, PETRI_TRANSITIONS=30} [2024-06-27 23:00:55,369 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2024-06-27 23:00:55,369 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 30 transitions, 164 flow [2024-06-27 23:00:55,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:55,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:55,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:00:55,370 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 23:00:55,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:55,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1247676486, now seen corresponding path program 6 times [2024-06-27 23:00:55,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:55,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733692389] [2024-06-27 23:00:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:55,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:55,517 INFO 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 23:00:55,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:55,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733692389] [2024-06-27 23:00:55,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733692389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:55,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:55,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:55,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892364528] [2024-06-27 23:00:55,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:55,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:55,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:55,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:55,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:55,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:55,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 30 transitions, 164 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:55,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:55,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:55,634 INFO L124 PetriNetUnfolderBase]: 75/176 cut-off events. [2024-06-27 23:00:55,634 INFO L125 PetriNetUnfolderBase]: For 1713/1717 co-relation queries the response was YES. [2024-06-27 23:00:55,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 176 events. 75/176 cut-off events. For 1713/1717 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 684 event pairs, 32 based on Foata normal form. 12/188 useless extension candidates. Maximal degree in co-relation 632. Up to 104 conditions per place. [2024-06-27 23:00:55,636 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 17 selfloop transitions, 8 changer transitions 9/39 dead transitions. [2024-06-27 23:00:55,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 39 transitions, 258 flow [2024-06-27 23:00:55,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 23:00:55,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541871921182266 [2024-06-27 23:00:55,637 INFO L175 Difference]: Start difference. First operand has 56 places, 30 transitions, 164 flow. Second operand 7 states and 110 transitions. [2024-06-27 23:00:55,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 39 transitions, 258 flow [2024-06-27 23:00:55,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 39 transitions, 232 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 23:00:55,640 INFO L231 Difference]: Finished difference. Result has 49 places, 27 transitions, 139 flow [2024-06-27 23:00:55,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=49, PETRI_TRANSITIONS=27} [2024-06-27 23:00:55,641 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2024-06-27 23:00:55,641 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 27 transitions, 139 flow [2024-06-27 23:00:55,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:55,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:55,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:00:55,642 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 23:00:55,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:55,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1247830308, now seen corresponding path program 6 times [2024-06-27 23:00:55,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:55,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198547829] [2024-06-27 23:00:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:55,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:55,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:55,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198547829] [2024-06-27 23:00:55,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198547829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:55,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:55,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:55,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159118009] [2024-06-27 23:00:55,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:55,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:55,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:55,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:55,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:55,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 27 transitions, 139 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:55,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:55,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:55,899 INFO L124 PetriNetUnfolderBase]: 66/161 cut-off events. [2024-06-27 23:00:55,900 INFO L125 PetriNetUnfolderBase]: For 1067/1067 co-relation queries the response was YES. [2024-06-27 23:00:55,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 161 events. 66/161 cut-off events. For 1067/1067 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 597 event pairs, 26 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 550. Up to 56 conditions per place. [2024-06-27 23:00:55,901 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 21 selfloop transitions, 6 changer transitions 7/39 dead transitions. [2024-06-27 23:00:55,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 39 transitions, 259 flow [2024-06-27 23:00:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 23:00:55,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541871921182266 [2024-06-27 23:00:55,903 INFO L175 Difference]: Start difference. First operand has 49 places, 27 transitions, 139 flow. Second operand 7 states and 110 transitions. [2024-06-27 23:00:55,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 39 transitions, 259 flow [2024-06-27 23:00:55,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 235 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:55,905 INFO L231 Difference]: Finished difference. Result has 47 places, 24 transitions, 117 flow [2024-06-27 23:00:55,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=117, PETRI_PLACES=47, PETRI_TRANSITIONS=24} [2024-06-27 23:00:55,906 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2024-06-27 23:00:55,906 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 24 transitions, 117 flow [2024-06-27 23:00:55,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:55,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:55,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:55,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:00:55,907 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 23:00:55,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:55,907 INFO L85 PathProgramCache]: Analyzing trace with hash 431425198, now seen corresponding path program 7 times [2024-06-27 23:00:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:55,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125539742] [2024-06-27 23:00:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:55,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:56,064 INFO 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 23:00:56,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:56,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125539742] [2024-06-27 23:00:56,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125539742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:56,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:56,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:56,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728161702] [2024-06-27 23:00:56,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:56,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:56,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:56,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 24 transitions, 117 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:56,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:56,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:56,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:56,210 INFO L124 PetriNetUnfolderBase]: 41/104 cut-off events. [2024-06-27 23:00:56,211 INFO L125 PetriNetUnfolderBase]: For 617/617 co-relation queries the response was YES. [2024-06-27 23:00:56,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 104 events. 41/104 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 295 event pairs, 18 based on Foata normal form. 8/112 useless extension candidates. Maximal degree in co-relation 320. Up to 44 conditions per place. [2024-06-27 23:00:56,212 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 14 selfloop transitions, 4 changer transitions 9/32 dead transitions. [2024-06-27 23:00:56,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 32 transitions, 191 flow [2024-06-27 23:00:56,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-27 23:00:56,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-06-27 23:00:56,214 INFO L175 Difference]: Start difference. First operand has 47 places, 24 transitions, 117 flow. Second operand 7 states and 105 transitions. [2024-06-27 23:00:56,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 32 transitions, 191 flow [2024-06-27 23:00:56,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 32 transitions, 173 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:56,215 INFO L231 Difference]: Finished difference. Result has 44 places, 20 transitions, 86 flow [2024-06-27 23:00:56,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=86, PETRI_PLACES=44, PETRI_TRANSITIONS=20} [2024-06-27 23:00:56,216 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-06-27 23:00:56,216 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 20 transitions, 86 flow [2024-06-27 23:00:56,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:56,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:56,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:56,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:00:56,217 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 23:00:56,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash 431640400, now seen corresponding path program 7 times [2024-06-27 23:00:56,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:56,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897901073] [2024-06-27 23:00:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:56,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:56,385 INFO 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 23:00:56,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:56,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897901073] [2024-06-27 23:00:56,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897901073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:56,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:56,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:56,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260032244] [2024-06-27 23:00:56,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:56,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:56,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:56,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:56,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:56,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 23:00:56,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 20 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:56,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:56,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 23:00:56,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:56,481 INFO L124 PetriNetUnfolderBase]: 17/54 cut-off events. [2024-06-27 23:00:56,482 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2024-06-27 23:00:56,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 54 events. 17/54 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 1 based on Foata normal form. 6/60 useless extension candidates. Maximal degree in co-relation 136. Up to 24 conditions per place. [2024-06-27 23:00:56,482 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2024-06-27 23:00:56,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 24 transitions, 118 flow [2024-06-27 23:00:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-06-27 23:00:56,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47783251231527096 [2024-06-27 23:00:56,483 INFO L175 Difference]: Start difference. First operand has 44 places, 20 transitions, 86 flow. Second operand 7 states and 97 transitions. [2024-06-27 23:00:56,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 24 transitions, 118 flow [2024-06-27 23:00:56,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 94 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 23:00:56,484 INFO L231 Difference]: Finished difference. Result has 33 places, 0 transitions, 0 flow [2024-06-27 23:00:56,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=33, PETRI_TRANSITIONS=0} [2024-06-27 23:00:56,485 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2024-06-27 23:00:56,486 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 0 transitions, 0 flow [2024-06-27 23:00:56,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:56,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-27 23:00:56,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-27 23:00:56,491 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-27 23:00:56,491 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-27 23:00:56,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:00:56,491 INFO L445 BasicCegarLoop]: Path program histogram: [7, 7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2024-06-27 23:00:56,494 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 23:00:56,494 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 23:00:56,498 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 23:00:56,498 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 23:00:56,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 11:00:56 BasicIcfg [2024-06-27 23:00:56,499 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 23:00:56,500 INFO L158 Benchmark]: Toolchain (without parser) took 13812.93ms. Allocated memory was 182.5MB in the beginning and 318.8MB in the end (delta: 136.3MB). Free memory was 127.1MB in the beginning and 209.3MB in the end (delta: -82.3MB). Peak memory consumption was 54.7MB. Max. memory is 16.1GB. [2024-06-27 23:00:56,500 INFO L158 Benchmark]: Witness Parser took 0.21ms. Allocated memory is still 100.7MB. Free memory was 64.8MB in the beginning and 64.8MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 23:00:56,500 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 100.7MB. Free memory is still 62.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 23:00:56,501 INFO L158 Benchmark]: CACSL2BoogieTranslator took 510.76ms. Allocated memory is still 182.5MB. Free memory was 126.7MB in the beginning and 101.5MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-27 23:00:56,501 INFO L158 Benchmark]: Boogie Procedure Inliner took 86.19ms. Allocated memory is still 182.5MB. Free memory was 101.5MB in the beginning and 147.5MB in the end (delta: -46.0MB). Peak memory consumption was 5.4MB. Max. memory is 16.1GB. [2024-06-27 23:00:56,501 INFO L158 Benchmark]: Boogie Preprocessor took 69.96ms. Allocated memory is still 182.5MB. Free memory was 147.5MB in the beginning and 145.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 23:00:56,501 INFO L158 Benchmark]: RCFGBuilder took 575.51ms. Allocated memory is still 182.5MB. Free memory was 145.4MB in the beginning and 127.9MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-06-27 23:00:56,502 INFO L158 Benchmark]: TraceAbstraction took 12565.18ms. Allocated memory was 182.5MB in the beginning and 318.8MB in the end (delta: 136.3MB). Free memory was 127.4MB in the beginning and 209.3MB in the end (delta: -81.9MB). Peak memory consumption was 57.6MB. Max. memory is 16.1GB. [2024-06-27 23:00:56,506 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.21ms. Allocated memory is still 100.7MB. Free memory was 64.8MB in the beginning and 64.8MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.16ms. Allocated memory is still 100.7MB. Free memory is still 62.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 510.76ms. Allocated memory is still 182.5MB. Free memory was 126.7MB in the beginning and 101.5MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 86.19ms. Allocated memory is still 182.5MB. Free memory was 101.5MB in the beginning and 147.5MB in the end (delta: -46.0MB). Peak memory consumption was 5.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 69.96ms. Allocated memory is still 182.5MB. Free memory was 147.5MB in the beginning and 145.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 575.51ms. Allocated memory is still 182.5MB. Free memory was 145.4MB in the beginning and 127.9MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 12565.18ms. Allocated memory was 182.5MB in the beginning and 318.8MB in the end (delta: 136.3MB). Free memory was 127.4MB in the beginning and 209.3MB in the end (delta: -81.9MB). Peak memory consumption was 57.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 763]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 764]: 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, 46 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: 12.5s, OverallIterations: 39, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1828 SdHoareTripleChecker+Valid, 3.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1371 mSDsluCounter, 344 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 205 mSDsCounter, 226 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5941 IncrementalHoareTripleChecker+Invalid, 6167 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 226 mSolverCounterUnsat, 139 mSDtfsCounter, 5941 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 264 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=524occurred in iteration=25, InterpolantAutomatonStates: 254, 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: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 549 NumberOfCodeBlocks, 549 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 510 ConstructedInterpolants, 0 QuantifiedInterpolants, 5005 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 39 InterpolantComputations, 39 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 23:00:56,544 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