./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_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-nonrel/safe001_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe001_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_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-eb4cb34-m [2024-06-21 20:02:36,684 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:02:36,771 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:02:36,778 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:02:36,779 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:02:36,815 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:02:36,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:02:36,817 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:02:36,817 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:02:36,821 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:02:36,821 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:02:36,822 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:02:36,823 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:02:36,824 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:02:36,824 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:02:36,825 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:02:36,825 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:02:36,825 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:02:36,826 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:02:36,826 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:02:36,826 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:02:36,827 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:02:36,827 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:02:36,827 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:02:36,828 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:02:36,828 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:02:36,828 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:02:36,829 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:02:36,830 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:02:36,831 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:02:36,832 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:02:36,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:02:36,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:02:36,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:02:36,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:02:36,833 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:02:36,833 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:02:36,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:02:36,834 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:02:36,834 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:02:36,834 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:02:36,835 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:02:36,835 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:02:36,835 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:02:37,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:02:37,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:02:37,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:02:37,136 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:02:37,136 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:02:37,137 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_tso.i [2024-06-21 20:02:38,383 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:02:38,628 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:02:38,629 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_tso.i [2024-06-21 20:02:38,654 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7444c411/8d6d24e1f2e6486fb8f95ffda9e6ba4e/FLAGacf1087a9 [2024-06-21 20:02:38,666 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7444c411/8d6d24e1f2e6486fb8f95ffda9e6ba4e [2024-06-21 20:02:38,668 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:02:38,669 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:02:38,669 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe001_tso.yml/witness.yml [2024-06-21 20:02:38,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:02:38,805 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:02:38,806 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:02:38,806 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:02:38,811 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:02:38,812 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:02:38" (1/2) ... [2024-06-21 20:02:38,814 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@402b9e81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:38, skipping insertion in model container [2024-06-21 20:02:38,814 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:02:38" (1/2) ... [2024-06-21 20:02:38,816 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@220b8002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:38, skipping insertion in model container [2024-06-21 20:02:38,816 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:38" (2/2) ... [2024-06-21 20:02:38,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@402b9e81 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:38, skipping insertion in model container [2024-06-21 20:02:38,817 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:38" (2/2) ... [2024-06-21 20:02:38,817 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:02:38,864 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:02:38,866 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 20:02:38,866 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 20:02:38,866 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 20:02:38,866 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:02:38,867 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-21 20:02:38,916 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:02:39,260 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:02:39,271 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:02:39,395 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:02:39,426 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:02:39,427 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39 WrapperNode [2024-06-21 20:02:39,427 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:02:39,429 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:02:39,429 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:02:39,429 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:02:39,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (1/1) ... [2024-06-21 20:02:39,458 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (1/1) ... [2024-06-21 20:02:39,483 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-21 20:02:39,483 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:02:39,484 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:02:39,484 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:02:39,484 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:02:39,492 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (1/1) ... [2024-06-21 20:02:39,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (1/1) ... [2024-06-21 20:02:39,495 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (1/1) ... [2024-06-21 20:02:39,507 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:02:39,508 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (1/1) ... [2024-06-21 20:02:39,508 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (1/1) ... [2024-06-21 20:02:39,514 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (1/1) ... [2024-06-21 20:02:39,516 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (1/1) ... [2024-06-21 20:02:39,517 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (1/1) ... [2024-06-21 20:02:39,518 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (1/1) ... [2024-06-21 20:02:39,521 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:02:39,521 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:02:39,522 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:02:39,522 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:02:39,523 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (1/1) ... [2024-06-21 20:02:39,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:02:39,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:02:39,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:02:39,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:02:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:02:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:02:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:02:39,582 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:02:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:02:39,583 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:02:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:02:39,583 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:02:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:02:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:02:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:02:39,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:02:39,584 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:02:39,753 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:02:39,756 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:02:39,934 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:02:39,935 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:02:40,015 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:02:40,020 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:02:40,020 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:02:40 BoogieIcfgContainer [2024-06-21 20:02:40,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:02:40,022 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:02:40,024 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:02:40,026 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:02:40,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:02:38" (1/4) ... [2024-06-21 20:02:40,027 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa19659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:02:40, skipping insertion in model container [2024-06-21 20:02:40,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:38" (2/4) ... [2024-06-21 20:02:40,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa19659 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:02:40, skipping insertion in model container [2024-06-21 20:02:40,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:39" (3/4) ... [2024-06-21 20:02:40,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa19659 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:02:40, skipping insertion in model container [2024-06-21 20:02:40,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:02:40" (4/4) ... [2024-06-21 20:02:40,030 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_tso.i [2024-06-21 20:02:40,046 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:02:40,047 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:02:40,047 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:02:40,096 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:02:40,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 20:02:40,170 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 20:02:40,176 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:02:40,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:02:40,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 20:02:40,181 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 20:02:40,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:02:40,197 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;@6d8a39f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:02:40,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:02:40,201 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:02:40,201 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:02:40,201 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:02:40,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:40,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:02:40,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:40,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash 218856700, now seen corresponding path program 1 times [2024-06-21 20:02:40,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:40,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41221880] [2024-06-21 20:02:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:40,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:40,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:40,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41221880] [2024-06-21 20:02:40,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41221880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:40,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:40,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:02:40,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388433719] [2024-06-21 20:02:40,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:40,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:02:40,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:40,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:02:40,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:02:40,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 20:02:40,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:40,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:40,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 20:02:40,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:40,901 INFO L124 PetriNetUnfolderBase]: 603/1008 cut-off events. [2024-06-21 20:02:40,901 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 20:02:40,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 1008 events. 603/1008 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4986 event pairs, 376 based on Foata normal form. 1/960 useless extension candidates. Maximal degree in co-relation 1988. Up to 929 conditions per place. [2024-06-21 20:02:40,917 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 28 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-21 20:02:40,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 161 flow [2024-06-21 20:02:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:02:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:02:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-21 20:02:40,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-06-21 20:02:40,934 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 83 transitions. [2024-06-21 20:02:40,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 161 flow [2024-06-21 20:02:40,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:40,940 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 20:02:40,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 20:02:40,947 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 20:02:40,947 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 20:02:40,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:40,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:40,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:40,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:02:40,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:40,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:40,951 INFO L85 PathProgramCache]: Analyzing trace with hash 200689681, now seen corresponding path program 1 times [2024-06-21 20:02:40,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:40,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387842992] [2024-06-21 20:02:40,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:40,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:41,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:41,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387842992] [2024-06-21 20:02:41,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387842992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:41,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:41,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:41,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782134194] [2024-06-21 20:02:41,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:41,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:41,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:41,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:41,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:41,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:41,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:41,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:41,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:41,403 INFO L124 PetriNetUnfolderBase]: 778/1331 cut-off events. [2024-06-21 20:02:41,403 INFO L125 PetriNetUnfolderBase]: For 255/296 co-relation queries the response was YES. [2024-06-21 20:02:41,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2970 conditions, 1331 events. 778/1331 cut-off events. For 255/296 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6714 event pairs, 280 based on Foata normal form. 9/1327 useless extension candidates. Maximal degree in co-relation 2958. Up to 1108 conditions per place. [2024-06-21 20:02:41,414 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 40 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-21 20:02:41,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 270 flow [2024-06-21 20:02:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:41,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:41,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-06-21 20:02:41,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-21 20:02:41,420 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 112 transitions. [2024-06-21 20:02:41,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 270 flow [2024-06-21 20:02:41,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:41,424 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 170 flow [2024-06-21 20:02:41,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-06-21 20:02:41,425 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 20:02:41,425 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 170 flow [2024-06-21 20:02:41,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:41,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:41,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:41,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:02:41,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:41,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:41,432 INFO L85 PathProgramCache]: Analyzing trace with hash 641512686, now seen corresponding path program 1 times [2024-06-21 20:02:41,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:41,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750136424] [2024-06-21 20:02:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:41,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:41,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:41,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750136424] [2024-06-21 20:02:41,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750136424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:41,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:41,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:41,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577044119] [2024-06-21 20:02:41,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:41,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:41,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:41,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:41,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:41,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:41,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:41,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:41,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:41,842 INFO L124 PetriNetUnfolderBase]: 790/1349 cut-off events. [2024-06-21 20:02:41,842 INFO L125 PetriNetUnfolderBase]: For 968/1121 co-relation queries the response was YES. [2024-06-21 20:02:41,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3599 conditions, 1349 events. 790/1349 cut-off events. For 968/1121 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6864 event pairs, 180 based on Foata normal form. 28/1364 useless extension candidates. Maximal degree in co-relation 3584. Up to 1076 conditions per place. [2024-06-21 20:02:41,855 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 44 selfloop transitions, 14 changer transitions 0/66 dead transitions. [2024-06-21 20:02:41,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 358 flow [2024-06-21 20:02:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 20:02:41,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.67 [2024-06-21 20:02:41,859 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 170 flow. Second operand 5 states and 134 transitions. [2024-06-21 20:02:41,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 358 flow [2024-06-21 20:02:41,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 354 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:41,864 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 218 flow [2024-06-21 20:02:41,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2024-06-21 20:02:41,865 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-21 20:02:41,866 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 218 flow [2024-06-21 20:02:41,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:41,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:41,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:41,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:02:41,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:41,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:41,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1224206505, now seen corresponding path program 1 times [2024-06-21 20:02:41,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:41,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652761500] [2024-06-21 20:02:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:41,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:42,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:42,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652761500] [2024-06-21 20:02:42,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652761500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:42,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:42,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:02:42,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704251452] [2024-06-21 20:02:42,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:42,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:02:42,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:42,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:02:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:02:42,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 20:02:42,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:42,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:42,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 20:02:42,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:42,171 INFO L124 PetriNetUnfolderBase]: 606/1012 cut-off events. [2024-06-21 20:02:42,172 INFO L125 PetriNetUnfolderBase]: For 1355/1376 co-relation queries the response was YES. [2024-06-21 20:02:42,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3126 conditions, 1012 events. 606/1012 cut-off events. For 1355/1376 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4990 event pairs, 248 based on Foata normal form. 19/1025 useless extension candidates. Maximal degree in co-relation 3108. Up to 892 conditions per place. [2024-06-21 20:02:42,181 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 35 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2024-06-21 20:02:42,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 338 flow [2024-06-21 20:02:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:42,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-21 20:02:42,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-06-21 20:02:42,183 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 218 flow. Second operand 4 states and 107 transitions. [2024-06-21 20:02:42,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 338 flow [2024-06-21 20:02:42,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 304 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:42,186 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 216 flow [2024-06-21 20:02:42,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-21 20:02:42,187 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-21 20:02:42,188 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 216 flow [2024-06-21 20:02:42,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:42,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:42,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:42,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:02:42,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:42,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:42,189 INFO L85 PathProgramCache]: Analyzing trace with hash 674753829, now seen corresponding path program 1 times [2024-06-21 20:02:42,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:42,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997097270] [2024-06-21 20:02:42,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:42,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:42,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:42,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997097270] [2024-06-21 20:02:42,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997097270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:42,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:42,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:42,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704590845] [2024-06-21 20:02:42,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:42,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:42,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:42,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:42,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:42,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:42,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 216 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:42,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:42,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:42,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:42,533 INFO L124 PetriNetUnfolderBase]: 923/1524 cut-off events. [2024-06-21 20:02:42,533 INFO L125 PetriNetUnfolderBase]: For 2070/2070 co-relation queries the response was YES. [2024-06-21 20:02:42,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4561 conditions, 1524 events. 923/1524 cut-off events. For 2070/2070 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7607 event pairs, 346 based on Foata normal form. 2/1525 useless extension candidates. Maximal degree in co-relation 4542. Up to 1383 conditions per place. [2024-06-21 20:02:42,545 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 51 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-06-21 20:02:42,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 68 transitions, 405 flow [2024-06-21 20:02:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:42,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 20:02:42,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-21 20:02:42,546 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 216 flow. Second operand 5 states and 119 transitions. [2024-06-21 20:02:42,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 68 transitions, 405 flow [2024-06-21 20:02:42,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 374 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:42,556 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 260 flow [2024-06-21 20:02:42,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-06-21 20:02:42,559 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-21 20:02:42,559 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 260 flow [2024-06-21 20:02:42,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:42,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:42,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:42,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:02:42,561 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:42,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:42,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1591766482, now seen corresponding path program 1 times [2024-06-21 20:02:42,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:42,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105412976] [2024-06-21 20:02:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:42,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:42,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:42,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105412976] [2024-06-21 20:02:42,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105412976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:42,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:42,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:42,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083968535] [2024-06-21 20:02:42,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:42,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:42,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:42,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:42,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:42,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:42,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:42,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:42,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:42,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:43,041 INFO L124 PetriNetUnfolderBase]: 1077/1762 cut-off events. [2024-06-21 20:02:43,041 INFO L125 PetriNetUnfolderBase]: For 2972/2972 co-relation queries the response was YES. [2024-06-21 20:02:43,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5641 conditions, 1762 events. 1077/1762 cut-off events. For 2972/2972 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9090 event pairs, 291 based on Foata normal form. 10/1767 useless extension candidates. Maximal degree in co-relation 5620. Up to 1372 conditions per place. [2024-06-21 20:02:43,057 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 60 selfloop transitions, 35 changer transitions 0/102 dead transitions. [2024-06-21 20:02:43,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 102 transitions, 656 flow [2024-06-21 20:02:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:02:43,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-21 20:02:43,059 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 260 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:02:43,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 102 transitions, 656 flow [2024-06-21 20:02:43,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 102 transitions, 656 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:43,067 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 477 flow [2024-06-21 20:02:43,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=477, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2024-06-21 20:02:43,070 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-06-21 20:02:43,070 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 477 flow [2024-06-21 20:02:43,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:43,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:43,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:02:43,071 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:43,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:43,071 INFO L85 PathProgramCache]: Analyzing trace with hash -101621692, now seen corresponding path program 2 times [2024-06-21 20:02:43,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:43,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989132997] [2024-06-21 20:02:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:43,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:43,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:43,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989132997] [2024-06-21 20:02:43,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989132997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:43,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:43,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:43,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881227868] [2024-06-21 20:02:43,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:43,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:43,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:43,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:43,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:43,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:43,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 477 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:43,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:43,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:43,467 INFO L124 PetriNetUnfolderBase]: 1072/1764 cut-off events. [2024-06-21 20:02:43,467 INFO L125 PetriNetUnfolderBase]: For 5459/5459 co-relation queries the response was YES. [2024-06-21 20:02:43,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7117 conditions, 1764 events. 1072/1764 cut-off events. For 5459/5459 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8985 event pairs, 331 based on Foata normal form. 2/1760 useless extension candidates. Maximal degree in co-relation 7091. Up to 1476 conditions per place. [2024-06-21 20:02:43,483 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 28 changer transitions 0/113 dead transitions. [2024-06-21 20:02:43,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 926 flow [2024-06-21 20:02:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:02:43,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:02:43,485 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 477 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:02:43,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 926 flow [2024-06-21 20:02:43,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 113 transitions, 869 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:43,498 INFO L231 Difference]: Finished difference. Result has 70 places, 90 transitions, 694 flow [2024-06-21 20:02:43,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=694, PETRI_PLACES=70, PETRI_TRANSITIONS=90} [2024-06-21 20:02:43,499 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2024-06-21 20:02:43,500 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 90 transitions, 694 flow [2024-06-21 20:02:43,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:43,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:43,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:02:43,500 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:43,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:43,501 INFO L85 PathProgramCache]: Analyzing trace with hash -101612764, now seen corresponding path program 1 times [2024-06-21 20:02:43,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:43,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661556785] [2024-06-21 20:02:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:43,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:43,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:43,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661556785] [2024-06-21 20:02:43,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661556785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:43,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:43,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528216878] [2024-06-21 20:02:43,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:43,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:43,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:43,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:43,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 90 transitions, 694 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:43,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:43,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:43,937 INFO L124 PetriNetUnfolderBase]: 1064/1758 cut-off events. [2024-06-21 20:02:43,937 INFO L125 PetriNetUnfolderBase]: For 7026/7026 co-relation queries the response was YES. [2024-06-21 20:02:43,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7701 conditions, 1758 events. 1064/1758 cut-off events. For 7026/7026 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9005 event pairs, 291 based on Foata normal form. 4/1761 useless extension candidates. Maximal degree in co-relation 7670. Up to 1562 conditions per place. [2024-06-21 20:02:43,955 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 93 selfloop transitions, 12 changer transitions 0/112 dead transitions. [2024-06-21 20:02:43,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 112 transitions, 974 flow [2024-06-21 20:02:43,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:02:43,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:02:43,957 INFO L175 Difference]: Start difference. First operand has 70 places, 90 transitions, 694 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:02:43,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 112 transitions, 974 flow [2024-06-21 20:02:43,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 112 transitions, 948 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:43,974 INFO L231 Difference]: Finished difference. Result has 76 places, 92 transitions, 723 flow [2024-06-21 20:02:43,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=76, PETRI_TRANSITIONS=92} [2024-06-21 20:02:43,975 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-21 20:02:43,975 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 92 transitions, 723 flow [2024-06-21 20:02:43,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:43,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:43,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:02:43,976 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:43,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:43,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1756921936, now seen corresponding path program 1 times [2024-06-21 20:02:43,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:43,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823738466] [2024-06-21 20:02:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:43,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:44,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:44,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823738466] [2024-06-21 20:02:44,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823738466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:44,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:44,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:44,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205035008] [2024-06-21 20:02:44,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:44,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:44,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:44,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:44,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:44,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:44,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 92 transitions, 723 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:44,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:44,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:44,436 INFO L124 PetriNetUnfolderBase]: 1087/1789 cut-off events. [2024-06-21 20:02:44,436 INFO L125 PetriNetUnfolderBase]: For 8606/8613 co-relation queries the response was YES. [2024-06-21 20:02:44,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8121 conditions, 1789 events. 1087/1789 cut-off events. For 8606/8613 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9263 event pairs, 309 based on Foata normal form. 10/1794 useless extension candidates. Maximal degree in co-relation 8087. Up to 1378 conditions per place. [2024-06-21 20:02:44,454 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 77 selfloop transitions, 52 changer transitions 0/136 dead transitions. [2024-06-21 20:02:44,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 136 transitions, 1243 flow [2024-06-21 20:02:44,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 20:02:44,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-06-21 20:02:44,455 INFO L175 Difference]: Start difference. First operand has 76 places, 92 transitions, 723 flow. Second operand 7 states and 185 transitions. [2024-06-21 20:02:44,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 136 transitions, 1243 flow [2024-06-21 20:02:44,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 136 transitions, 1206 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:44,474 INFO L231 Difference]: Finished difference. Result has 81 places, 103 transitions, 949 flow [2024-06-21 20:02:44,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=949, PETRI_PLACES=81, PETRI_TRANSITIONS=103} [2024-06-21 20:02:44,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-21 20:02:44,475 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 103 transitions, 949 flow [2024-06-21 20:02:44,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:44,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:44,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:02:44,476 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:44,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:44,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1573001468, now seen corresponding path program 2 times [2024-06-21 20:02:44,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:44,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879382063] [2024-06-21 20:02:44,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:44,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:44,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:44,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879382063] [2024-06-21 20:02:44,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879382063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:44,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:44,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:44,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511467276] [2024-06-21 20:02:44,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:44,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:44,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:44,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:44,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:44,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:44,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 103 transitions, 949 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:44,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:44,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:44,907 INFO L124 PetriNetUnfolderBase]: 1086/1788 cut-off events. [2024-06-21 20:02:44,908 INFO L125 PetriNetUnfolderBase]: For 10860/10863 co-relation queries the response was YES. [2024-06-21 20:02:44,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8816 conditions, 1788 events. 1086/1788 cut-off events. For 10860/10863 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9245 event pairs, 323 based on Foata normal form. 6/1787 useless extension candidates. Maximal degree in co-relation 8779. Up to 1380 conditions per place. [2024-06-21 20:02:44,926 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 69 selfloop transitions, 50 changer transitions 0/126 dead transitions. [2024-06-21 20:02:44,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 1314 flow [2024-06-21 20:02:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:02:44,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-21 20:02:44,928 INFO L175 Difference]: Start difference. First operand has 81 places, 103 transitions, 949 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:02:44,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 1314 flow [2024-06-21 20:02:44,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 126 transitions, 1236 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:44,953 INFO L231 Difference]: Finished difference. Result has 84 places, 107 transitions, 1030 flow [2024-06-21 20:02:44,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1030, PETRI_PLACES=84, PETRI_TRANSITIONS=107} [2024-06-21 20:02:44,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-21 20:02:44,954 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 107 transitions, 1030 flow [2024-06-21 20:02:44,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:44,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:44,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:02:44,955 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:44,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1022792798, now seen corresponding path program 3 times [2024-06-21 20:02:44,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:44,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803395418] [2024-06-21 20:02:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:44,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:45,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:45,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803395418] [2024-06-21 20:02:45,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803395418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:45,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:45,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:45,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829704738] [2024-06-21 20:02:45,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:45,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:45,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:45,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:45,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:45,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:45,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 107 transitions, 1030 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:45,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:45,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:45,326 INFO L124 PetriNetUnfolderBase]: 1081/1797 cut-off events. [2024-06-21 20:02:45,326 INFO L125 PetriNetUnfolderBase]: For 12408/12411 co-relation queries the response was YES. [2024-06-21 20:02:45,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8999 conditions, 1797 events. 1081/1797 cut-off events. For 12408/12411 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9301 event pairs, 330 based on Foata normal form. 4/1794 useless extension candidates. Maximal degree in co-relation 8961. Up to 1489 conditions per place. [2024-06-21 20:02:45,347 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 94 selfloop transitions, 28 changer transitions 0/129 dead transitions. [2024-06-21 20:02:45,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 129 transitions, 1351 flow [2024-06-21 20:02:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:45,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 20:02:45,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 20:02:45,349 INFO L175 Difference]: Start difference. First operand has 84 places, 107 transitions, 1030 flow. Second operand 6 states and 145 transitions. [2024-06-21 20:02:45,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 129 transitions, 1351 flow [2024-06-21 20:02:45,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 129 transitions, 1243 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:45,383 INFO L231 Difference]: Finished difference. Result has 88 places, 109 transitions, 1020 flow [2024-06-21 20:02:45,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1020, PETRI_PLACES=88, PETRI_TRANSITIONS=109} [2024-06-21 20:02:45,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-21 20:02:45,384 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 109 transitions, 1020 flow [2024-06-21 20:02:45,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:45,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:45,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:02:45,385 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:45,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:45,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2118063951, now seen corresponding path program 1 times [2024-06-21 20:02:45,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:45,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153514908] [2024-06-21 20:02:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:45,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:45,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:45,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153514908] [2024-06-21 20:02:45,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153514908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:45,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:45,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:45,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613008332] [2024-06-21 20:02:45,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:45,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:45,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:45,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:45,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:45,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 109 transitions, 1020 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:45,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:45,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:45,732 INFO L124 PetriNetUnfolderBase]: 1075/1771 cut-off events. [2024-06-21 20:02:45,732 INFO L125 PetriNetUnfolderBase]: For 12466/12470 co-relation queries the response was YES. [2024-06-21 20:02:45,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8925 conditions, 1771 events. 1075/1771 cut-off events. For 12466/12470 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9090 event pairs, 306 based on Foata normal form. 6/1775 useless extension candidates. Maximal degree in co-relation 8885. Up to 1586 conditions per place. [2024-06-21 20:02:45,751 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 102 selfloop transitions, 10 changer transitions 0/119 dead transitions. [2024-06-21 20:02:45,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 119 transitions, 1288 flow [2024-06-21 20:02:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:45,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-21 20:02:45,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-21 20:02:45,752 INFO L175 Difference]: Start difference. First operand has 88 places, 109 transitions, 1020 flow. Second operand 4 states and 97 transitions. [2024-06-21 20:02:45,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 119 transitions, 1288 flow [2024-06-21 20:02:45,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 119 transitions, 1246 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:45,787 INFO L231 Difference]: Finished difference. Result has 90 places, 109 transitions, 1008 flow [2024-06-21 20:02:45,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1008, PETRI_PLACES=90, PETRI_TRANSITIONS=109} [2024-06-21 20:02:45,788 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-21 20:02:45,788 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 109 transitions, 1008 flow [2024-06-21 20:02:45,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:45,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:45,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:02:45,789 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:45,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:45,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1228387191, now seen corresponding path program 1 times [2024-06-21 20:02:45,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:45,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959618461] [2024-06-21 20:02:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:45,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:45,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:45,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959618461] [2024-06-21 20:02:45,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959618461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:45,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:45,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:45,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138348723] [2024-06-21 20:02:45,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:45,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:45,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:45,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:45,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:45,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:45,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 109 transitions, 1008 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:45,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:45,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:46,177 INFO L124 PetriNetUnfolderBase]: 1054/1750 cut-off events. [2024-06-21 20:02:46,178 INFO L125 PetriNetUnfolderBase]: For 16007/16033 co-relation queries the response was YES. [2024-06-21 20:02:46,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9019 conditions, 1750 events. 1054/1750 cut-off events. For 16007/16033 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9199 event pairs, 197 based on Foata normal form. 14/1704 useless extension candidates. Maximal degree in co-relation 8977. Up to 1351 conditions per place. [2024-06-21 20:02:46,197 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 94 selfloop transitions, 20 changer transitions 0/133 dead transitions. [2024-06-21 20:02:46,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 133 transitions, 1388 flow [2024-06-21 20:02:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 20:02:46,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-21 20:02:46,200 INFO L175 Difference]: Start difference. First operand has 90 places, 109 transitions, 1008 flow. Second operand 5 states and 129 transitions. [2024-06-21 20:02:46,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 133 transitions, 1388 flow [2024-06-21 20:02:46,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 133 transitions, 1305 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:46,240 INFO L231 Difference]: Finished difference. Result has 91 places, 113 transitions, 1024 flow [2024-06-21 20:02:46,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1024, PETRI_PLACES=91, PETRI_TRANSITIONS=113} [2024-06-21 20:02:46,241 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-21 20:02:46,242 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 113 transitions, 1024 flow [2024-06-21 20:02:46,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:46,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:46,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:02:46,242 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:46,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:46,243 INFO L85 PathProgramCache]: Analyzing trace with hash 608882149, now seen corresponding path program 2 times [2024-06-21 20:02:46,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:46,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906062204] [2024-06-21 20:02:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:46,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:46,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:46,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906062204] [2024-06-21 20:02:46,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906062204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:46,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:46,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:46,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522570297] [2024-06-21 20:02:46,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:46,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:46,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:46,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:46,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:46,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 113 transitions, 1024 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:46,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:46,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:46,636 INFO L124 PetriNetUnfolderBase]: 1038/1721 cut-off events. [2024-06-21 20:02:46,636 INFO L125 PetriNetUnfolderBase]: For 17047/17078 co-relation queries the response was YES. [2024-06-21 20:02:46,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9065 conditions, 1721 events. 1038/1721 cut-off events. For 17047/17078 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8990 event pairs, 252 based on Foata normal form. 10/1676 useless extension candidates. Maximal degree in co-relation 9022. Up to 1417 conditions per place. [2024-06-21 20:02:46,654 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 90 selfloop transitions, 22 changer transitions 0/131 dead transitions. [2024-06-21 20:02:46,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 131 transitions, 1312 flow [2024-06-21 20:02:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:46,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 20:02:46,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-21 20:02:46,656 INFO L175 Difference]: Start difference. First operand has 91 places, 113 transitions, 1024 flow. Second operand 5 states and 128 transitions. [2024-06-21 20:02:46,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 131 transitions, 1312 flow [2024-06-21 20:02:46,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 131 transitions, 1267 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:46,691 INFO L231 Difference]: Finished difference. Result has 95 places, 113 transitions, 1031 flow [2024-06-21 20:02:46,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1031, PETRI_PLACES=95, PETRI_TRANSITIONS=113} [2024-06-21 20:02:46,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-21 20:02:46,692 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 113 transitions, 1031 flow [2024-06-21 20:02:46,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:46,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:46,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:02:46,693 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:46,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:46,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1110054363, now seen corresponding path program 1 times [2024-06-21 20:02:46,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:46,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172108987] [2024-06-21 20:02:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:46,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:46,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:46,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172108987] [2024-06-21 20:02:46,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172108987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:46,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:46,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:46,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667435264] [2024-06-21 20:02:46,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:46,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:46,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:46,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:46,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:46,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:46,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 113 transitions, 1031 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:46,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:46,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:47,307 INFO L124 PetriNetUnfolderBase]: 1383/2281 cut-off events. [2024-06-21 20:02:47,307 INFO L125 PetriNetUnfolderBase]: For 25918/25918 co-relation queries the response was YES. [2024-06-21 20:02:47,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11280 conditions, 2281 events. 1383/2281 cut-off events. For 25918/25918 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12429 event pairs, 327 based on Foata normal form. 74/2350 useless extension candidates. Maximal degree in co-relation 11235. Up to 1438 conditions per place. [2024-06-21 20:02:47,328 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 80 selfloop transitions, 64 changer transitions 0/151 dead transitions. [2024-06-21 20:02:47,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 151 transitions, 1543 flow [2024-06-21 20:02:47,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:47,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:47,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 20:02:47,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:02:47,330 INFO L175 Difference]: Start difference. First operand has 95 places, 113 transitions, 1031 flow. Second operand 8 states and 208 transitions. [2024-06-21 20:02:47,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 151 transitions, 1543 flow [2024-06-21 20:02:47,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 151 transitions, 1490 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:47,371 INFO L231 Difference]: Finished difference. Result has 99 places, 117 transitions, 1184 flow [2024-06-21 20:02:47,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1184, PETRI_PLACES=99, PETRI_TRANSITIONS=117} [2024-06-21 20:02:47,372 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-21 20:02:47,373 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 117 transitions, 1184 flow [2024-06-21 20:02:47,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:47,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:47,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:02:47,374 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:47,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:47,374 INFO L85 PathProgramCache]: Analyzing trace with hash -805228571, now seen corresponding path program 2 times [2024-06-21 20:02:47,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:47,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758584017] [2024-06-21 20:02:47,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:47,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:47,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:47,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758584017] [2024-06-21 20:02:47,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758584017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:47,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:47,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:47,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765431142] [2024-06-21 20:02:47,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:47,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:47,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:47,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:47,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:47,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:47,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 117 transitions, 1184 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:47,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:47,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:47,893 INFO L124 PetriNetUnfolderBase]: 1400/2302 cut-off events. [2024-06-21 20:02:47,894 INFO L125 PetriNetUnfolderBase]: For 22320/22320 co-relation queries the response was YES. [2024-06-21 20:02:47,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12169 conditions, 2302 events. 1400/2302 cut-off events. For 22320/22320 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12513 event pairs, 379 based on Foata normal form. 4/2299 useless extension candidates. Maximal degree in co-relation 12123. Up to 2006 conditions per place. [2024-06-21 20:02:47,918 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 34 changer transitions 0/144 dead transitions. [2024-06-21 20:02:47,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 144 transitions, 1555 flow [2024-06-21 20:02:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:02:47,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:02:47,920 INFO L175 Difference]: Start difference. First operand has 99 places, 117 transitions, 1184 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:02:47,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 144 transitions, 1555 flow [2024-06-21 20:02:47,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 144 transitions, 1391 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:47,985 INFO L231 Difference]: Finished difference. Result has 100 places, 119 transitions, 1129 flow [2024-06-21 20:02:47,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1129, PETRI_PLACES=100, PETRI_TRANSITIONS=119} [2024-06-21 20:02:47,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-21 20:02:47,986 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 119 transitions, 1129 flow [2024-06-21 20:02:47,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:47,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:47,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:02:47,988 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:47,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash -804931901, now seen corresponding path program 3 times [2024-06-21 20:02:47,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:47,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555330105] [2024-06-21 20:02:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:47,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:48,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:48,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555330105] [2024-06-21 20:02:48,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555330105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:48,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:48,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:48,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311095546] [2024-06-21 20:02:48,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:48,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:48,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:48,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:48,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:48,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:48,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 119 transitions, 1129 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:48,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:48,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:48,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:48,493 INFO L124 PetriNetUnfolderBase]: 1392/2290 cut-off events. [2024-06-21 20:02:48,493 INFO L125 PetriNetUnfolderBase]: For 19822/19822 co-relation queries the response was YES. [2024-06-21 20:02:48,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11303 conditions, 2290 events. 1392/2290 cut-off events. For 19822/19822 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12371 event pairs, 336 based on Foata normal form. 4/2287 useless extension candidates. Maximal degree in co-relation 11256. Up to 1843 conditions per place. [2024-06-21 20:02:48,552 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 105 selfloop transitions, 39 changer transitions 0/151 dead transitions. [2024-06-21 20:02:48,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 151 transitions, 1540 flow [2024-06-21 20:02:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:02:48,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-21 20:02:48,554 INFO L175 Difference]: Start difference. First operand has 100 places, 119 transitions, 1129 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:02:48,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 151 transitions, 1540 flow [2024-06-21 20:02:48,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 1451 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:48,603 INFO L231 Difference]: Finished difference. Result has 103 places, 122 transitions, 1177 flow [2024-06-21 20:02:48,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1177, PETRI_PLACES=103, PETRI_TRANSITIONS=122} [2024-06-21 20:02:48,604 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-21 20:02:48,604 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 122 transitions, 1177 flow [2024-06-21 20:02:48,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:48,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:48,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:48,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:02:48,606 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:48,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:48,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1021554729, now seen corresponding path program 1 times [2024-06-21 20:02:48,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:48,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386681943] [2024-06-21 20:02:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:48,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:48,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:48,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386681943] [2024-06-21 20:02:48,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386681943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:48,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:48,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:48,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9638649] [2024-06-21 20:02:48,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:48,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:48,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:48,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:48,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:48,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 122 transitions, 1177 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:48,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:48,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:48,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:49,323 INFO L124 PetriNetUnfolderBase]: 2251/3776 cut-off events. [2024-06-21 20:02:49,323 INFO L125 PetriNetUnfolderBase]: For 50064/50067 co-relation queries the response was YES. [2024-06-21 20:02:49,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18867 conditions, 3776 events. 2251/3776 cut-off events. For 50064/50067 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23473 event pairs, 439 based on Foata normal form. 56/3825 useless extension candidates. Maximal degree in co-relation 18818. Up to 1439 conditions per place. [2024-06-21 20:02:49,359 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 121 selfloop transitions, 61 changer transitions 0/189 dead transitions. [2024-06-21 20:02:49,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 189 transitions, 2077 flow [2024-06-21 20:02:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-21 20:02:49,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7107142857142857 [2024-06-21 20:02:49,360 INFO L175 Difference]: Start difference. First operand has 103 places, 122 transitions, 1177 flow. Second operand 7 states and 199 transitions. [2024-06-21 20:02:49,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 189 transitions, 2077 flow [2024-06-21 20:02:49,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 189 transitions, 1984 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:49,455 INFO L231 Difference]: Finished difference. Result has 108 places, 136 transitions, 1468 flow [2024-06-21 20:02:49,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1468, PETRI_PLACES=108, PETRI_TRANSITIONS=136} [2024-06-21 20:02:49,456 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-21 20:02:49,456 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 136 transitions, 1468 flow [2024-06-21 20:02:49,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:49,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:49,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:49,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:02:49,457 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:49,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:49,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1695478005, now seen corresponding path program 2 times [2024-06-21 20:02:49,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:49,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722470620] [2024-06-21 20:02:49,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:49,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:49,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:49,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722470620] [2024-06-21 20:02:49,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722470620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:49,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:49,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:49,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694189827] [2024-06-21 20:02:49,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:49,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:49,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:49,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:49,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:49,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:49,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 136 transitions, 1468 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:49,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:49,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:49,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:50,302 INFO L124 PetriNetUnfolderBase]: 2629/4454 cut-off events. [2024-06-21 20:02:50,302 INFO L125 PetriNetUnfolderBase]: For 66111/66111 co-relation queries the response was YES. [2024-06-21 20:02:50,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23104 conditions, 4454 events. 2629/4454 cut-off events. For 66111/66111 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 29042 event pairs, 803 based on Foata normal form. 54/4503 useless extension candidates. Maximal degree in co-relation 23052. Up to 2665 conditions per place. [2024-06-21 20:02:50,350 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 111 selfloop transitions, 71 changer transitions 0/189 dead transitions. [2024-06-21 20:02:50,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 189 transitions, 2236 flow [2024-06-21 20:02:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-21 20:02:50,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-06-21 20:02:50,353 INFO L175 Difference]: Start difference. First operand has 108 places, 136 transitions, 1468 flow. Second operand 8 states and 218 transitions. [2024-06-21 20:02:50,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 189 transitions, 2236 flow [2024-06-21 20:02:50,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 189 transitions, 2077 flow, removed 60 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:50,549 INFO L231 Difference]: Finished difference. Result has 116 places, 145 transitions, 1659 flow [2024-06-21 20:02:50,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1659, PETRI_PLACES=116, PETRI_TRANSITIONS=145} [2024-06-21 20:02:50,549 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-21 20:02:50,550 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 145 transitions, 1659 flow [2024-06-21 20:02:50,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:50,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:50,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:50,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:02:50,550 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:50,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash 622101427, now seen corresponding path program 3 times [2024-06-21 20:02:50,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:50,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082562895] [2024-06-21 20:02:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:50,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:50,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082562895] [2024-06-21 20:02:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082562895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:50,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270388061] [2024-06-21 20:02:50,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:50,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:50,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:50,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:50,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 145 transitions, 1659 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:50,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:50,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:50,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:51,550 INFO L124 PetriNetUnfolderBase]: 3054/5239 cut-off events. [2024-06-21 20:02:51,550 INFO L125 PetriNetUnfolderBase]: For 81223/81230 co-relation queries the response was YES. [2024-06-21 20:02:51,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27230 conditions, 5239 events. 3054/5239 cut-off events. For 81223/81230 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35745 event pairs, 962 based on Foata normal form. 48/5282 useless extension candidates. Maximal degree in co-relation 27174. Up to 3708 conditions per place. [2024-06-21 20:02:51,619 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 132 selfloop transitions, 61 changer transitions 0/200 dead transitions. [2024-06-21 20:02:51,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 200 transitions, 2448 flow [2024-06-21 20:02:51,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-21 20:02:51,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.678125 [2024-06-21 20:02:51,622 INFO L175 Difference]: Start difference. First operand has 116 places, 145 transitions, 1659 flow. Second operand 8 states and 217 transitions. [2024-06-21 20:02:51,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 200 transitions, 2448 flow [2024-06-21 20:02:51,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 200 transitions, 2261 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:51,845 INFO L231 Difference]: Finished difference. Result has 119 places, 151 transitions, 1722 flow [2024-06-21 20:02:51,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1722, PETRI_PLACES=119, PETRI_TRANSITIONS=151} [2024-06-21 20:02:51,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-21 20:02:51,846 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 151 transitions, 1722 flow [2024-06-21 20:02:51,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:51,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:51,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:51,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:02:51,847 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:51,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:51,847 INFO L85 PathProgramCache]: Analyzing trace with hash -179426513, now seen corresponding path program 4 times [2024-06-21 20:02:51,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:51,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137846660] [2024-06-21 20:02:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:51,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:51,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:51,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137846660] [2024-06-21 20:02:51,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137846660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:51,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:51,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:51,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496036960] [2024-06-21 20:02:51,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:51,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:51,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:51,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:51,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:52,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:52,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 151 transitions, 1722 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:52,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:52,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:52,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:52,662 INFO L124 PetriNetUnfolderBase]: 3241/5562 cut-off events. [2024-06-21 20:02:52,662 INFO L125 PetriNetUnfolderBase]: For 89142/89149 co-relation queries the response was YES. [2024-06-21 20:02:52,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28495 conditions, 5562 events. 3241/5562 cut-off events. For 89142/89149 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38624 event pairs, 1295 based on Foata normal form. 56/5613 useless extension candidates. Maximal degree in co-relation 28438. Up to 4628 conditions per place. [2024-06-21 20:02:52,720 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 127 selfloop transitions, 58 changer transitions 0/192 dead transitions. [2024-06-21 20:02:52,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 192 transitions, 2327 flow [2024-06-21 20:02:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 20:02:52,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-06-21 20:02:52,722 INFO L175 Difference]: Start difference. First operand has 119 places, 151 transitions, 1722 flow. Second operand 8 states and 210 transitions. [2024-06-21 20:02:52,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 192 transitions, 2327 flow [2024-06-21 20:02:53,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 192 transitions, 2215 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:53,010 INFO L231 Difference]: Finished difference. Result has 123 places, 153 transitions, 1785 flow [2024-06-21 20:02:53,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1785, PETRI_PLACES=123, PETRI_TRANSITIONS=153} [2024-06-21 20:02:53,010 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-21 20:02:53,011 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 153 transitions, 1785 flow [2024-06-21 20:02:53,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:53,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:53,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:53,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:02:53,012 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:53,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:53,012 INFO L85 PathProgramCache]: Analyzing trace with hash -174064133, now seen corresponding path program 5 times [2024-06-21 20:02:53,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:53,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308432290] [2024-06-21 20:02:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:53,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:53,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:53,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308432290] [2024-06-21 20:02:53,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308432290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:53,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:53,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:53,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580429570] [2024-06-21 20:02:53,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:53,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:53,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:53,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:53,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:53,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:53,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 153 transitions, 1785 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:53,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:53,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:53,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:53,910 INFO L124 PetriNetUnfolderBase]: 3296/5666 cut-off events. [2024-06-21 20:02:53,911 INFO L125 PetriNetUnfolderBase]: For 91376/91379 co-relation queries the response was YES. [2024-06-21 20:02:53,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28592 conditions, 5666 events. 3296/5666 cut-off events. For 91376/91379 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39700 event pairs, 1340 based on Foata normal form. 52/5711 useless extension candidates. Maximal degree in co-relation 28533. Up to 4737 conditions per place. [2024-06-21 20:02:53,957 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 122 selfloop transitions, 53 changer transitions 0/182 dead transitions. [2024-06-21 20:02:53,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 182 transitions, 2299 flow [2024-06-21 20:02:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:02:53,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-21 20:02:53,959 INFO L175 Difference]: Start difference. First operand has 123 places, 153 transitions, 1785 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:02:53,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 182 transitions, 2299 flow [2024-06-21 20:02:54,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 182 transitions, 2162 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:54,234 INFO L231 Difference]: Finished difference. Result has 124 places, 155 transitions, 1815 flow [2024-06-21 20:02:54,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1815, PETRI_PLACES=124, PETRI_TRANSITIONS=155} [2024-06-21 20:02:54,234 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-21 20:02:54,234 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 155 transitions, 1815 flow [2024-06-21 20:02:54,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:54,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:54,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:54,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:02:54,235 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:54,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash -173848931, now seen corresponding path program 1 times [2024-06-21 20:02:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:54,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219253445] [2024-06-21 20:02:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:54,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:54,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:54,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219253445] [2024-06-21 20:02:54,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219253445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:54,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:54,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:54,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115413166] [2024-06-21 20:02:54,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:54,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:54,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:54,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:54,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:54,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 155 transitions, 1815 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:54,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:54,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:54,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:55,159 INFO L124 PetriNetUnfolderBase]: 3353/5810 cut-off events. [2024-06-21 20:02:55,159 INFO L125 PetriNetUnfolderBase]: For 90789/90792 co-relation queries the response was YES. [2024-06-21 20:02:55,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28647 conditions, 5810 events. 3353/5810 cut-off events. For 90789/90792 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41137 event pairs, 1183 based on Foata normal form. 44/5841 useless extension candidates. Maximal degree in co-relation 28587. Up to 3809 conditions per place. [2024-06-21 20:02:55,199 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 120 selfloop transitions, 62 changer transitions 0/189 dead transitions. [2024-06-21 20:02:55,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 189 transitions, 2353 flow [2024-06-21 20:02:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 20:02:55,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6535714285714286 [2024-06-21 20:02:55,200 INFO L175 Difference]: Start difference. First operand has 124 places, 155 transitions, 1815 flow. Second operand 7 states and 183 transitions. [2024-06-21 20:02:55,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 189 transitions, 2353 flow [2024-06-21 20:02:55,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 189 transitions, 2222 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:55,484 INFO L231 Difference]: Finished difference. Result has 126 places, 156 transitions, 1846 flow [2024-06-21 20:02:55,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1846, PETRI_PLACES=126, PETRI_TRANSITIONS=156} [2024-06-21 20:02:55,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-21 20:02:55,485 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 156 transitions, 1846 flow [2024-06-21 20:02:55,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:55,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:55,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:55,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:02:55,486 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:55,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash -643618595, now seen corresponding path program 6 times [2024-06-21 20:02:55,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:55,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427977575] [2024-06-21 20:02:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:55,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:55,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:55,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427977575] [2024-06-21 20:02:55,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427977575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:55,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:55,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:55,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364312772] [2024-06-21 20:02:55,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:55,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:55,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:55,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:55,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:55,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:55,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 156 transitions, 1846 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:55,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:55,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:55,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:56,446 INFO L124 PetriNetUnfolderBase]: 3386/5876 cut-off events. [2024-06-21 20:02:56,447 INFO L125 PetriNetUnfolderBase]: For 89829/89832 co-relation queries the response was YES. [2024-06-21 20:02:56,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29068 conditions, 5876 events. 3386/5876 cut-off events. For 89829/89832 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41901 event pairs, 1417 based on Foata normal form. 18/5887 useless extension candidates. Maximal degree in co-relation 29007. Up to 5238 conditions per place. [2024-06-21 20:02:56,498 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 149 selfloop transitions, 29 changer transitions 0/185 dead transitions. [2024-06-21 20:02:56,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 185 transitions, 2302 flow [2024-06-21 20:02:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:02:56,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:02:56,500 INFO L175 Difference]: Start difference. First operand has 126 places, 156 transitions, 1846 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:02:56,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 185 transitions, 2302 flow [2024-06-21 20:02:56,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 185 transitions, 2119 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:56,862 INFO L231 Difference]: Finished difference. Result has 127 places, 157 transitions, 1746 flow [2024-06-21 20:02:56,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1746, PETRI_PLACES=127, PETRI_TRANSITIONS=157} [2024-06-21 20:02:56,863 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-21 20:02:56,863 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 157 transitions, 1746 flow [2024-06-21 20:02:56,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:56,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:56,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:56,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:02:56,864 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:56,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:56,864 INFO L85 PathProgramCache]: Analyzing trace with hash -643403393, now seen corresponding path program 2 times [2024-06-21 20:02:56,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:56,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693607722] [2024-06-21 20:02:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:56,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:56,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:56,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693607722] [2024-06-21 20:02:56,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693607722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:56,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:56,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:56,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810813992] [2024-06-21 20:02:56,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:56,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:56,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:56,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:56,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:57,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:57,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 157 transitions, 1746 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:57,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:57,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:57,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:57,704 INFO L124 PetriNetUnfolderBase]: 3427/5957 cut-off events. [2024-06-21 20:02:57,705 INFO L125 PetriNetUnfolderBase]: For 93136/93139 co-relation queries the response was YES. [2024-06-21 20:02:57,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28940 conditions, 5957 events. 3427/5957 cut-off events. For 93136/93139 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42639 event pairs, 1417 based on Foata normal form. 14/5964 useless extension candidates. Maximal degree in co-relation 28879. Up to 5222 conditions per place. [2024-06-21 20:02:57,740 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 151 selfloop transitions, 31 changer transitions 0/189 dead transitions. [2024-06-21 20:02:57,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 189 transitions, 2224 flow [2024-06-21 20:02:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:02:57,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 20:02:57,742 INFO L175 Difference]: Start difference. First operand has 127 places, 157 transitions, 1746 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:02:57,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 189 transitions, 2224 flow [2024-06-21 20:02:57,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 189 transitions, 2157 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:57,858 INFO L231 Difference]: Finished difference. Result has 129 places, 158 transitions, 1767 flow [2024-06-21 20:02:57,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1767, PETRI_PLACES=129, PETRI_TRANSITIONS=158} [2024-06-21 20:02:57,859 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-21 20:02:57,859 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 158 transitions, 1767 flow [2024-06-21 20:02:57,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:57,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:57,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:57,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:02:57,860 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:57,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash -377706113, now seen corresponding path program 3 times [2024-06-21 20:02:57,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:57,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172693227] [2024-06-21 20:02:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:57,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:58,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:58,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172693227] [2024-06-21 20:02:58,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172693227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:58,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:58,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:58,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924803432] [2024-06-21 20:02:58,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:58,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:58,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:58,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:58,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:58,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:58,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 158 transitions, 1767 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:58,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:58,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:58,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:58,774 INFO L124 PetriNetUnfolderBase]: 3407/5925 cut-off events. [2024-06-21 20:02:58,774 INFO L125 PetriNetUnfolderBase]: For 96232/96235 co-relation queries the response was YES. [2024-06-21 20:02:58,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28765 conditions, 5925 events. 3407/5925 cut-off events. For 96232/96235 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 41972 event pairs, 1357 based on Foata normal form. 14/5932 useless extension candidates. Maximal degree in co-relation 28703. Up to 4717 conditions per place. [2024-06-21 20:02:58,815 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 144 selfloop transitions, 38 changer transitions 0/189 dead transitions. [2024-06-21 20:02:58,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 189 transitions, 2181 flow [2024-06-21 20:02:58,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:02:58,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:02:58,817 INFO L175 Difference]: Start difference. First operand has 129 places, 158 transitions, 1767 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:02:58,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 189 transitions, 2181 flow [2024-06-21 20:02:58,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 189 transitions, 2105 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:58,991 INFO L231 Difference]: Finished difference. Result has 130 places, 157 transitions, 1723 flow [2024-06-21 20:02:58,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1723, PETRI_PLACES=130, PETRI_TRANSITIONS=157} [2024-06-21 20:02:58,991 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-21 20:02:58,991 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 157 transitions, 1723 flow [2024-06-21 20:02:58,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:58,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:58,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:58,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:02:58,992 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:58,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:58,993 INFO L85 PathProgramCache]: Analyzing trace with hash 355058448, now seen corresponding path program 1 times [2024-06-21 20:02:58,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:58,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416610280] [2024-06-21 20:02:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:58,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:59,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:59,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416610280] [2024-06-21 20:02:59,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416610280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:59,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:59,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:59,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207201985] [2024-06-21 20:02:59,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:59,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:59,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:59,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:59,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 157 transitions, 1723 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:59,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:59,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:59,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:59,905 INFO L124 PetriNetUnfolderBase]: 3404/5932 cut-off events. [2024-06-21 20:02:59,905 INFO L125 PetriNetUnfolderBase]: For 97731/97735 co-relation queries the response was YES. [2024-06-21 20:02:59,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29002 conditions, 5932 events. 3404/5932 cut-off events. For 97731/97735 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42614 event pairs, 1389 based on Foata normal form. 5/5935 useless extension candidates. Maximal degree in co-relation 28939. Up to 5467 conditions per place. [2024-06-21 20:02:59,943 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 151 selfloop transitions, 13 changer transitions 0/171 dead transitions. [2024-06-21 20:02:59,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 171 transitions, 2128 flow [2024-06-21 20:02:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-21 20:02:59,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-21 20:02:59,944 INFO L175 Difference]: Start difference. First operand has 130 places, 157 transitions, 1723 flow. Second operand 5 states and 114 transitions. [2024-06-21 20:02:59,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 171 transitions, 2128 flow [2024-06-21 20:03:00,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 171 transitions, 2053 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:00,144 INFO L231 Difference]: Finished difference. Result has 131 places, 160 transitions, 1726 flow [2024-06-21 20:03:00,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1726, PETRI_PLACES=131, PETRI_TRANSITIONS=160} [2024-06-21 20:03:00,145 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-21 20:03:00,145 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 160 transitions, 1726 flow [2024-06-21 20:03:00,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:00,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:00,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:00,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:03:00,146 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:00,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:00,146 INFO L85 PathProgramCache]: Analyzing trace with hash 177575574, now seen corresponding path program 1 times [2024-06-21 20:03:00,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:00,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757445649] [2024-06-21 20:03:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:00,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:00,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:00,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757445649] [2024-06-21 20:03:00,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757445649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:00,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:00,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:00,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766765924] [2024-06-21 20:03:00,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:00,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:00,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:00,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:00,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:00,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 160 transitions, 1726 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:00,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:00,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:00,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:00,900 INFO L124 PetriNetUnfolderBase]: 3401/5946 cut-off events. [2024-06-21 20:03:00,900 INFO L125 PetriNetUnfolderBase]: For 102626/102626 co-relation queries the response was YES. [2024-06-21 20:03:00,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29407 conditions, 5946 events. 3401/5946 cut-off events. For 102626/102626 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42869 event pairs, 1368 based on Foata normal form. 1/5946 useless extension candidates. Maximal degree in co-relation 29343. Up to 5442 conditions per place. [2024-06-21 20:03:00,940 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 160 selfloop transitions, 29 changer transitions 0/196 dead transitions. [2024-06-21 20:03:00,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 196 transitions, 2409 flow [2024-06-21 20:03:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:00,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 20:03:00,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-21 20:03:00,941 INFO L175 Difference]: Start difference. First operand has 131 places, 160 transitions, 1726 flow. Second operand 6 states and 143 transitions. [2024-06-21 20:03:00,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 196 transitions, 2409 flow [2024-06-21 20:03:01,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 196 transitions, 2347 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:01,261 INFO L231 Difference]: Finished difference. Result has 137 places, 177 transitions, 1980 flow [2024-06-21 20:03:01,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1980, PETRI_PLACES=137, PETRI_TRANSITIONS=177} [2024-06-21 20:03:01,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-21 20:03:01,262 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 177 transitions, 1980 flow [2024-06-21 20:03:01,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:01,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:01,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:01,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:03:01,263 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:01,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:01,264 INFO L85 PathProgramCache]: Analyzing trace with hash 77800384, now seen corresponding path program 1 times [2024-06-21 20:03:01,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:01,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373370368] [2024-06-21 20:03:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:01,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:01,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:01,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373370368] [2024-06-21 20:03:01,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373370368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:01,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:01,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:01,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827372592] [2024-06-21 20:03:01,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:01,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:01,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:01,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:01,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 177 transitions, 1980 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:01,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:01,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:01,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:02,234 INFO L124 PetriNetUnfolderBase]: 3476/6069 cut-off events. [2024-06-21 20:03:02,234 INFO L125 PetriNetUnfolderBase]: For 115596/115596 co-relation queries the response was YES. [2024-06-21 20:03:02,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31429 conditions, 6069 events. 3476/6069 cut-off events. For 115596/115596 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 43823 event pairs, 1395 based on Foata normal form. 6/6070 useless extension candidates. Maximal degree in co-relation 31361. Up to 5451 conditions per place. [2024-06-21 20:03:02,270 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 161 selfloop transitions, 45 changer transitions 2/215 dead transitions. [2024-06-21 20:03:02,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 215 transitions, 2726 flow [2024-06-21 20:03:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:03:02,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 20:03:02,272 INFO L175 Difference]: Start difference. First operand has 137 places, 177 transitions, 1980 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:03:02,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 215 transitions, 2726 flow [2024-06-21 20:03:02,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 215 transitions, 2680 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:02,514 INFO L231 Difference]: Finished difference. Result has 145 places, 198 transitions, 2347 flow [2024-06-21 20:03:02,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2347, PETRI_PLACES=145, PETRI_TRANSITIONS=198} [2024-06-21 20:03:02,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-21 20:03:02,515 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 198 transitions, 2347 flow [2024-06-21 20:03:02,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:02,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:02,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:02,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:03:02,516 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:02,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:02,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1348067408, now seen corresponding path program 2 times [2024-06-21 20:03:02,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:02,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146348373] [2024-06-21 20:03:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:02,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:02,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:02,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146348373] [2024-06-21 20:03:02,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146348373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:02,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:02,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:02,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891915712] [2024-06-21 20:03:02,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:02,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:02,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:02,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:02,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:02,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:02,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 198 transitions, 2347 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:02,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:02,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:02,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:03,392 INFO L124 PetriNetUnfolderBase]: 3468/6058 cut-off events. [2024-06-21 20:03:03,393 INFO L125 PetriNetUnfolderBase]: For 121916/121916 co-relation queries the response was YES. [2024-06-21 20:03:03,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31819 conditions, 6058 events. 3468/6058 cut-off events. For 121916/121916 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 43680 event pairs, 1391 based on Foata normal form. 6/6059 useless extension candidates. Maximal degree in co-relation 31747. Up to 5296 conditions per place. [2024-06-21 20:03:03,436 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 93 changer transitions 1/227 dead transitions. [2024-06-21 20:03:03,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 227 transitions, 3046 flow [2024-06-21 20:03:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 20:03:03,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-21 20:03:03,438 INFO L175 Difference]: Start difference. First operand has 145 places, 198 transitions, 2347 flow. Second operand 7 states and 179 transitions. [2024-06-21 20:03:03,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 227 transitions, 3046 flow [2024-06-21 20:03:03,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 227 transitions, 2952 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:03,667 INFO L231 Difference]: Finished difference. Result has 149 places, 204 transitions, 2547 flow [2024-06-21 20:03:03,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2547, PETRI_PLACES=149, PETRI_TRANSITIONS=204} [2024-06-21 20:03:03,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-21 20:03:03,668 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 204 transitions, 2547 flow [2024-06-21 20:03:03,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:03,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:03,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:03,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:03:03,668 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:03,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:03,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1348304558, now seen corresponding path program 3 times [2024-06-21 20:03:03,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:03,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830436606] [2024-06-21 20:03:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:03,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:03,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:03,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830436606] [2024-06-21 20:03:03,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830436606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:03,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:03,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:03,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172406316] [2024-06-21 20:03:03,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:03,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:03,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:03,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:03,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:03,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:03,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 204 transitions, 2547 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:03,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:03,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:03,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:04,729 INFO L124 PetriNetUnfolderBase]: 3384/5898 cut-off events. [2024-06-21 20:03:04,730 INFO L125 PetriNetUnfolderBase]: For 127061/127064 co-relation queries the response was YES. [2024-06-21 20:03:04,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31529 conditions, 5898 events. 3384/5898 cut-off events. For 127061/127064 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 42127 event pairs, 1363 based on Foata normal form. 5/5896 useless extension candidates. Maximal degree in co-relation 31456. Up to 5152 conditions per place. [2024-06-21 20:03:04,776 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 127 selfloop transitions, 83 changer transitions 1/218 dead transitions. [2024-06-21 20:03:04,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 218 transitions, 3061 flow [2024-06-21 20:03:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:03:04,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:03:04,777 INFO L175 Difference]: Start difference. First operand has 149 places, 204 transitions, 2547 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:03:04,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 218 transitions, 3061 flow [2024-06-21 20:03:05,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 218 transitions, 2923 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:05,179 INFO L231 Difference]: Finished difference. Result has 151 places, 203 transitions, 2572 flow [2024-06-21 20:03:05,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2572, PETRI_PLACES=151, PETRI_TRANSITIONS=203} [2024-06-21 20:03:05,179 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-21 20:03:05,180 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 203 transitions, 2572 flow [2024-06-21 20:03:05,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:05,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:05,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:05,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:03:05,180 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:05,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:05,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1348313486, now seen corresponding path program 1 times [2024-06-21 20:03:05,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:05,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551534340] [2024-06-21 20:03:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:05,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:05,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:05,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551534340] [2024-06-21 20:03:05,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551534340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:05,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:05,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:05,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774583103] [2024-06-21 20:03:05,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:05,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:05,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:05,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:05,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 203 transitions, 2572 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:05,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:05,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:05,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:06,343 INFO L124 PetriNetUnfolderBase]: 3364/5854 cut-off events. [2024-06-21 20:03:06,343 INFO L125 PetriNetUnfolderBase]: For 133594/133598 co-relation queries the response was YES. [2024-06-21 20:03:06,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31512 conditions, 5854 events. 3364/5854 cut-off events. For 133594/133598 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 41598 event pairs, 1291 based on Foata normal form. 8/5860 useless extension candidates. Maximal degree in co-relation 31438. Up to 5367 conditions per place. [2024-06-21 20:03:06,381 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 193 selfloop transitions, 16 changer transitions 0/216 dead transitions. [2024-06-21 20:03:06,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 216 transitions, 3061 flow [2024-06-21 20:03:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-21 20:03:06,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:03:06,382 INFO L175 Difference]: Start difference. First operand has 151 places, 203 transitions, 2572 flow. Second operand 5 states and 115 transitions. [2024-06-21 20:03:06,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 216 transitions, 3061 flow [2024-06-21 20:03:06,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 216 transitions, 2813 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:06,646 INFO L231 Difference]: Finished difference. Result has 150 places, 205 transitions, 2405 flow [2024-06-21 20:03:06,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2405, PETRI_PLACES=150, PETRI_TRANSITIONS=205} [2024-06-21 20:03:06,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-21 20:03:06,647 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 205 transitions, 2405 flow [2024-06-21 20:03:06,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:06,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:06,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:06,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:03:06,647 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:06,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:06,648 INFO L85 PathProgramCache]: Analyzing trace with hash 305494220, now seen corresponding path program 1 times [2024-06-21 20:03:06,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:06,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838857506] [2024-06-21 20:03:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:06,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:06,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:06,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838857506] [2024-06-21 20:03:06,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838857506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:06,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:06,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:06,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523664264] [2024-06-21 20:03:06,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:06,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:06,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:06,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:06,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:06,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:06,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 205 transitions, 2405 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:06,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:06,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:06,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:07,647 INFO L124 PetriNetUnfolderBase]: 3399/5930 cut-off events. [2024-06-21 20:03:07,647 INFO L125 PetriNetUnfolderBase]: For 138699/138706 co-relation queries the response was YES. [2024-06-21 20:03:07,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31863 conditions, 5930 events. 3399/5930 cut-off events. For 138699/138706 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 42414 event pairs, 1340 based on Foata normal form. 9/5934 useless extension candidates. Maximal degree in co-relation 31788. Up to 5325 conditions per place. [2024-06-21 20:03:07,688 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 191 selfloop transitions, 36 changer transitions 2/236 dead transitions. [2024-06-21 20:03:07,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 236 transitions, 3073 flow [2024-06-21 20:03:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:03:07,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-21 20:03:07,689 INFO L175 Difference]: Start difference. First operand has 150 places, 205 transitions, 2405 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:03:07,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 236 transitions, 3073 flow [2024-06-21 20:03:07,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 236 transitions, 3006 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:07,961 INFO L231 Difference]: Finished difference. Result has 156 places, 217 transitions, 2600 flow [2024-06-21 20:03:07,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2600, PETRI_PLACES=156, PETRI_TRANSITIONS=217} [2024-06-21 20:03:07,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-21 20:03:07,962 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 217 transitions, 2600 flow [2024-06-21 20:03:07,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:07,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:07,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:07,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:03:07,962 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:07,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:07,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1316619980, now seen corresponding path program 2 times [2024-06-21 20:03:07,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:07,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737124611] [2024-06-21 20:03:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:07,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:08,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:08,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737124611] [2024-06-21 20:03:08,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737124611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:08,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:08,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:08,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920858345] [2024-06-21 20:03:08,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:08,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:08,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:08,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:08,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 217 transitions, 2600 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:08,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:08,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:08,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:09,008 INFO L124 PetriNetUnfolderBase]: 3407/5927 cut-off events. [2024-06-21 20:03:09,008 INFO L125 PetriNetUnfolderBase]: For 139594/139604 co-relation queries the response was YES. [2024-06-21 20:03:09,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32050 conditions, 5927 events. 3407/5927 cut-off events. For 139594/139604 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 42123 event pairs, 1338 based on Foata normal form. 11/5933 useless extension candidates. Maximal degree in co-relation 31972. Up to 5160 conditions per place. [2024-06-21 20:03:09,057 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 139 selfloop transitions, 99 changer transitions 1/246 dead transitions. [2024-06-21 20:03:09,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 246 transitions, 3272 flow [2024-06-21 20:03:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:03:09,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-21 20:03:09,059 INFO L175 Difference]: Start difference. First operand has 156 places, 217 transitions, 2600 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:03:09,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 246 transitions, 3272 flow [2024-06-21 20:03:09,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 246 transitions, 3192 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:09,336 INFO L231 Difference]: Finished difference. Result has 160 places, 221 transitions, 2796 flow [2024-06-21 20:03:09,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2796, PETRI_PLACES=160, PETRI_TRANSITIONS=221} [2024-06-21 20:03:09,337 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-21 20:03:09,337 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 221 transitions, 2796 flow [2024-06-21 20:03:09,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:09,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:09,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:09,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:03:09,337 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:09,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:09,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1316631140, now seen corresponding path program 3 times [2024-06-21 20:03:09,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:09,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40548369] [2024-06-21 20:03:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:09,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:09,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:09,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40548369] [2024-06-21 20:03:09,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40548369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:09,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:09,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:09,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445713619] [2024-06-21 20:03:09,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:09,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:09,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:09,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:09,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:09,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:09,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 221 transitions, 2796 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:09,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:09,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:09,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:10,297 INFO L124 PetriNetUnfolderBase]: 3340/5796 cut-off events. [2024-06-21 20:03:10,297 INFO L125 PetriNetUnfolderBase]: For 146058/146061 co-relation queries the response was YES. [2024-06-21 20:03:10,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31913 conditions, 5796 events. 3340/5796 cut-off events. For 146058/146061 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 40784 event pairs, 1317 based on Foata normal form. 5/5794 useless extension candidates. Maximal degree in co-relation 31834. Up to 5043 conditions per place. [2024-06-21 20:03:10,347 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 131 selfloop transitions, 92 changer transitions 4/234 dead transitions. [2024-06-21 20:03:10,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 234 transitions, 3282 flow [2024-06-21 20:03:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:03:10,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:03:10,348 INFO L175 Difference]: Start difference. First operand has 160 places, 221 transitions, 2796 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:03:10,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 234 transitions, 3282 flow [2024-06-21 20:03:10,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 234 transitions, 3109 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:10,672 INFO L231 Difference]: Finished difference. Result has 162 places, 217 transitions, 2766 flow [2024-06-21 20:03:10,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2623, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2766, PETRI_PLACES=162, PETRI_TRANSITIONS=217} [2024-06-21 20:03:10,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-21 20:03:10,673 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 217 transitions, 2766 flow [2024-06-21 20:03:10,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:10,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:10,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:10,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:03:10,673 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:10,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:10,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1152415580, now seen corresponding path program 4 times [2024-06-21 20:03:10,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:10,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190147598] [2024-06-21 20:03:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:10,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:10,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:10,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190147598] [2024-06-21 20:03:10,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190147598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:10,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:10,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:10,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284853631] [2024-06-21 20:03:10,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:10,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:10,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:10,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:10,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:10,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:10,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 217 transitions, 2766 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:10,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:10,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:10,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:11,591 INFO L124 PetriNetUnfolderBase]: 3067/5311 cut-off events. [2024-06-21 20:03:11,591 INFO L125 PetriNetUnfolderBase]: For 156138/156141 co-relation queries the response was YES. [2024-06-21 20:03:11,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30955 conditions, 5311 events. 3067/5311 cut-off events. For 156138/156141 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36380 event pairs, 1147 based on Foata normal form. 5/5309 useless extension candidates. Maximal degree in co-relation 30875. Up to 4488 conditions per place. [2024-06-21 20:03:11,633 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 138 selfloop transitions, 108 changer transitions 0/253 dead transitions. [2024-06-21 20:03:11,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 253 transitions, 3760 flow [2024-06-21 20:03:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:03:11,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:03:11,634 INFO L175 Difference]: Start difference. First operand has 162 places, 217 transitions, 2766 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:03:11,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 253 transitions, 3760 flow [2024-06-21 20:03:11,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 253 transitions, 3473 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:11,970 INFO L231 Difference]: Finished difference. Result has 164 places, 234 transitions, 2997 flow [2024-06-21 20:03:11,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2997, PETRI_PLACES=164, PETRI_TRANSITIONS=234} [2024-06-21 20:03:11,971 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-21 20:03:11,971 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 234 transitions, 2997 flow [2024-06-21 20:03:11,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:11,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:11,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:11,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:03:11,972 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:11,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:11,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2083050032, now seen corresponding path program 1 times [2024-06-21 20:03:11,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:11,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041457499] [2024-06-21 20:03:11,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:11,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:12,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:12,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041457499] [2024-06-21 20:03:12,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041457499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:12,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:12,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:12,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577808106] [2024-06-21 20:03:12,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:12,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:12,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:12,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:12,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:12,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 234 transitions, 2997 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:12,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:12,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:12,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:12,826 INFO L124 PetriNetUnfolderBase]: 3064/5294 cut-off events. [2024-06-21 20:03:12,826 INFO L125 PetriNetUnfolderBase]: For 166508/166508 co-relation queries the response was YES. [2024-06-21 20:03:12,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32364 conditions, 5294 events. 3064/5294 cut-off events. For 166508/166508 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 36086 event pairs, 1112 based on Foata normal form. 1/5294 useless extension candidates. Maximal degree in co-relation 32281. Up to 4804 conditions per place. [2024-06-21 20:03:12,869 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 206 selfloop transitions, 41 changer transitions 0/254 dead transitions. [2024-06-21 20:03:12,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 254 transitions, 3571 flow [2024-06-21 20:03:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 20:03:12,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 20:03:12,870 INFO L175 Difference]: Start difference. First operand has 164 places, 234 transitions, 2997 flow. Second operand 7 states and 160 transitions. [2024-06-21 20:03:12,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 254 transitions, 3571 flow [2024-06-21 20:03:13,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 254 transitions, 3407 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:13,287 INFO L231 Difference]: Finished difference. Result has 169 places, 234 transitions, 2924 flow [2024-06-21 20:03:13,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2836, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2924, PETRI_PLACES=169, PETRI_TRANSITIONS=234} [2024-06-21 20:03:13,287 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-21 20:03:13,288 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 234 transitions, 2924 flow [2024-06-21 20:03:13,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:13,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:13,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:13,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:03:13,288 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:13,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash 187423959, now seen corresponding path program 1 times [2024-06-21 20:03:13,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:13,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712832342] [2024-06-21 20:03:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:13,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:13,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:13,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712832342] [2024-06-21 20:03:13,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712832342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:13,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:13,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:13,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106068553] [2024-06-21 20:03:13,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:13,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:13,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:13,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:13,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:13,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:13,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 234 transitions, 2924 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:13,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:13,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:13,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:14,132 INFO L124 PetriNetUnfolderBase]: 3106/5348 cut-off events. [2024-06-21 20:03:14,132 INFO L125 PetriNetUnfolderBase]: For 167654/167654 co-relation queries the response was YES. [2024-06-21 20:03:14,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32420 conditions, 5348 events. 3106/5348 cut-off events. For 167654/167654 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 36371 event pairs, 1131 based on Foata normal form. 2/5345 useless extension candidates. Maximal degree in co-relation 32336. Up to 4602 conditions per place. [2024-06-21 20:03:14,177 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 142 selfloop transitions, 120 changer transitions 0/269 dead transitions. [2024-06-21 20:03:14,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 269 transitions, 3844 flow [2024-06-21 20:03:14,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:14,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:03:14,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-21 20:03:14,178 INFO L175 Difference]: Start difference. First operand has 169 places, 234 transitions, 2924 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:03:14,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 269 transitions, 3844 flow [2024-06-21 20:03:14,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 269 transitions, 3752 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:14,539 INFO L231 Difference]: Finished difference. Result has 172 places, 245 transitions, 3263 flow [2024-06-21 20:03:14,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3263, PETRI_PLACES=172, PETRI_TRANSITIONS=245} [2024-06-21 20:03:14,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-21 20:03:14,540 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 245 transitions, 3263 flow [2024-06-21 20:03:14,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:14,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:14,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:14,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:03:14,540 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:14,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1624844291, now seen corresponding path program 2 times [2024-06-21 20:03:14,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:14,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874932330] [2024-06-21 20:03:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:14,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:14,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:14,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874932330] [2024-06-21 20:03:14,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874932330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:14,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:14,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:14,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847711351] [2024-06-21 20:03:14,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:14,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:14,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:14,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:14,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:14,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 245 transitions, 3263 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:14,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:14,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:14,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:15,361 INFO L124 PetriNetUnfolderBase]: 3127/5378 cut-off events. [2024-06-21 20:03:15,361 INFO L125 PetriNetUnfolderBase]: For 183611/183611 co-relation queries the response was YES. [2024-06-21 20:03:15,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34285 conditions, 5378 events. 3127/5378 cut-off events. For 183611/183611 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 36563 event pairs, 1156 based on Foata normal form. 1/5372 useless extension candidates. Maximal degree in co-relation 34200. Up to 4495 conditions per place. [2024-06-21 20:03:15,416 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 136 selfloop transitions, 148 changer transitions 0/291 dead transitions. [2024-06-21 20:03:15,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 291 transitions, 4591 flow [2024-06-21 20:03:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:03:15,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-21 20:03:15,418 INFO L175 Difference]: Start difference. First operand has 172 places, 245 transitions, 3263 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:03:15,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 291 transitions, 4591 flow [2024-06-21 20:03:15,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 291 transitions, 4406 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:15,881 INFO L231 Difference]: Finished difference. Result has 178 places, 266 transitions, 3867 flow [2024-06-21 20:03:15,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3092, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3867, PETRI_PLACES=178, PETRI_TRANSITIONS=266} [2024-06-21 20:03:15,881 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-21 20:03:15,881 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 266 transitions, 3867 flow [2024-06-21 20:03:15,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:15,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:15,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:15,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:03:15,882 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:15,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:15,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1636272131, now seen corresponding path program 3 times [2024-06-21 20:03:15,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:15,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152962991] [2024-06-21 20:03:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:15,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:15,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152962991] [2024-06-21 20:03:15,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152962991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:15,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:15,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:15,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692651197] [2024-06-21 20:03:15,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:15,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:15,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:15,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:15,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:16,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:16,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 266 transitions, 3867 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:16,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:16,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:16,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:16,812 INFO L124 PetriNetUnfolderBase]: 3124/5376 cut-off events. [2024-06-21 20:03:16,813 INFO L125 PetriNetUnfolderBase]: For 193675/193675 co-relation queries the response was YES. [2024-06-21 20:03:16,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35168 conditions, 5376 events. 3124/5376 cut-off events. For 193675/193675 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36593 event pairs, 1160 based on Foata normal form. 1/5370 useless extension candidates. Maximal degree in co-relation 35079. Up to 4494 conditions per place. [2024-06-21 20:03:16,869 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 148 changer transitions 0/288 dead transitions. [2024-06-21 20:03:16,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 288 transitions, 4767 flow [2024-06-21 20:03:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:03:16,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-21 20:03:16,872 INFO L175 Difference]: Start difference. First operand has 178 places, 266 transitions, 3867 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:03:16,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 288 transitions, 4767 flow [2024-06-21 20:03:17,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 288 transitions, 4643 flow, removed 62 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:17,423 INFO L231 Difference]: Finished difference. Result has 185 places, 267 transitions, 4079 flow [2024-06-21 20:03:17,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3753, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4079, PETRI_PLACES=185, PETRI_TRANSITIONS=267} [2024-06-21 20:03:17,423 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-21 20:03:17,423 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 267 transitions, 4079 flow [2024-06-21 20:03:17,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:17,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:17,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:17,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:03:17,424 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:17,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1033257001, now seen corresponding path program 4 times [2024-06-21 20:03:17,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:17,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892028509] [2024-06-21 20:03:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:17,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:17,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:17,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892028509] [2024-06-21 20:03:17,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892028509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:17,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:17,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:17,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804018296] [2024-06-21 20:03:17,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:17,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:17,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:17,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:17,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:17,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:17,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 267 transitions, 4079 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:17,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:17,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:17,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:18,284 INFO L124 PetriNetUnfolderBase]: 3166/5445 cut-off events. [2024-06-21 20:03:18,284 INFO L125 PetriNetUnfolderBase]: For 206495/206495 co-relation queries the response was YES. [2024-06-21 20:03:18,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36253 conditions, 5445 events. 3166/5445 cut-off events. For 206495/206495 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 37086 event pairs, 1128 based on Foata normal form. 2/5442 useless extension candidates. Maximal degree in co-relation 36161. Up to 4840 conditions per place. [2024-06-21 20:03:18,339 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 230 selfloop transitions, 62 changer transitions 0/299 dead transitions. [2024-06-21 20:03:18,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 299 transitions, 5131 flow [2024-06-21 20:03:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:03:18,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 20:03:18,341 INFO L175 Difference]: Start difference. First operand has 185 places, 267 transitions, 4079 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:03:18,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 299 transitions, 5131 flow [2024-06-21 20:03:19,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 299 transitions, 4806 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:19,017 INFO L231 Difference]: Finished difference. Result has 191 places, 281 transitions, 4217 flow [2024-06-21 20:03:19,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3774, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4217, PETRI_PLACES=191, PETRI_TRANSITIONS=281} [2024-06-21 20:03:19,019 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-21 20:03:19,019 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 281 transitions, 4217 flow [2024-06-21 20:03:19,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:19,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:19,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:19,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:03:19,019 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:19,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:19,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1751742047, now seen corresponding path program 1 times [2024-06-21 20:03:19,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:19,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605282343] [2024-06-21 20:03:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:19,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:19,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:19,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605282343] [2024-06-21 20:03:19,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605282343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:19,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:19,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:19,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712676952] [2024-06-21 20:03:19,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:19,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:19,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:19,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:19,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:19,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:19,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 281 transitions, 4217 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:19,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:19,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:19,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:19,982 INFO L124 PetriNetUnfolderBase]: 3160/5435 cut-off events. [2024-06-21 20:03:19,982 INFO L125 PetriNetUnfolderBase]: For 213263/213263 co-relation queries the response was YES. [2024-06-21 20:03:20,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36156 conditions, 5435 events. 3160/5435 cut-off events. For 213263/213263 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 36916 event pairs, 1131 based on Foata normal form. 2/5432 useless extension candidates. Maximal degree in co-relation 36061. Up to 4835 conditions per place. [2024-06-21 20:03:20,043 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 230 selfloop transitions, 62 changer transitions 0/299 dead transitions. [2024-06-21 20:03:20,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 299 transitions, 5002 flow [2024-06-21 20:03:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:20,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:03:20,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 20:03:20,045 INFO L175 Difference]: Start difference. First operand has 191 places, 281 transitions, 4217 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:03:20,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 299 transitions, 5002 flow [2024-06-21 20:03:20,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 299 transitions, 4864 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:20,634 INFO L231 Difference]: Finished difference. Result has 195 places, 281 transitions, 4210 flow [2024-06-21 20:03:20,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4210, PETRI_PLACES=195, PETRI_TRANSITIONS=281} [2024-06-21 20:03:20,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-21 20:03:20,635 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 281 transitions, 4210 flow [2024-06-21 20:03:20,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:20,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:20,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:20,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:03:20,636 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:20,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:20,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1587327249, now seen corresponding path program 2 times [2024-06-21 20:03:20,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:20,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829951211] [2024-06-21 20:03:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:20,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:20,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:20,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829951211] [2024-06-21 20:03:20,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829951211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:20,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:20,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:20,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266400357] [2024-06-21 20:03:20,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:20,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:20,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:20,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:20,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:20,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:20,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 281 transitions, 4210 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:20,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:20,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:20,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:21,633 INFO L124 PetriNetUnfolderBase]: 3160/5435 cut-off events. [2024-06-21 20:03:21,633 INFO L125 PetriNetUnfolderBase]: For 223351/223351 co-relation queries the response was YES. [2024-06-21 20:03:21,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36352 conditions, 5435 events. 3160/5435 cut-off events. For 223351/223351 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36962 event pairs, 1129 based on Foata normal form. 2/5432 useless extension candidates. Maximal degree in co-relation 36256. Up to 4581 conditions per place. [2024-06-21 20:03:21,693 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 153 selfloop transitions, 149 changer transitions 0/309 dead transitions. [2024-06-21 20:03:21,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 309 transitions, 5192 flow [2024-06-21 20:03:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:21,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:03:21,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-21 20:03:21,694 INFO L175 Difference]: Start difference. First operand has 195 places, 281 transitions, 4210 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:03:21,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 309 transitions, 5192 flow [2024-06-21 20:03:22,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 309 transitions, 5044 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:22,364 INFO L231 Difference]: Finished difference. Result has 198 places, 285 transitions, 4492 flow [2024-06-21 20:03:22,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4062, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4492, PETRI_PLACES=198, PETRI_TRANSITIONS=285} [2024-06-21 20:03:22,365 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-21 20:03:22,365 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 285 transitions, 4492 flow [2024-06-21 20:03:22,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:22,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:22,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:22,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:03:22,366 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:22,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:22,366 INFO L85 PathProgramCache]: Analyzing trace with hash -945497777, now seen corresponding path program 5 times [2024-06-21 20:03:22,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:22,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955918280] [2024-06-21 20:03:22,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:22,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:22,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:22,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955918280] [2024-06-21 20:03:22,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955918280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:22,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:22,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:22,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900259881] [2024-06-21 20:03:22,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:22,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:22,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:22,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:22,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 285 transitions, 4492 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:22,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:22,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:22,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:23,414 INFO L124 PetriNetUnfolderBase]: 3154/5424 cut-off events. [2024-06-21 20:03:23,414 INFO L125 PetriNetUnfolderBase]: For 233377/233377 co-relation queries the response was YES. [2024-06-21 20:03:23,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36832 conditions, 5424 events. 3154/5424 cut-off events. For 233377/233377 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 36901 event pairs, 1123 based on Foata normal form. 2/5421 useless extension candidates. Maximal degree in co-relation 36734. Up to 4578 conditions per place. [2024-06-21 20:03:23,469 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 153 selfloop transitions, 152 changer transitions 0/312 dead transitions. [2024-06-21 20:03:23,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 312 transitions, 5408 flow [2024-06-21 20:03:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:03:23,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-21 20:03:23,470 INFO L175 Difference]: Start difference. First operand has 198 places, 285 transitions, 4492 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:03:23,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 312 transitions, 5408 flow [2024-06-21 20:03:24,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 312 transitions, 5192 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:24,066 INFO L231 Difference]: Finished difference. Result has 202 places, 285 transitions, 4602 flow [2024-06-21 20:03:24,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4602, PETRI_PLACES=202, PETRI_TRANSITIONS=285} [2024-06-21 20:03:24,066 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-21 20:03:24,066 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 285 transitions, 4602 flow [2024-06-21 20:03:24,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:24,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:24,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:24,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:03:24,067 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:24,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1359633489, now seen corresponding path program 3 times [2024-06-21 20:03:24,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:24,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681418715] [2024-06-21 20:03:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:24,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:24,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:24,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681418715] [2024-06-21 20:03:24,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681418715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:24,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:24,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:24,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249062681] [2024-06-21 20:03:24,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:24,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:24,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:24,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:24,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:24,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 285 transitions, 4602 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:24,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:24,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:24,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:24,948 INFO L124 PetriNetUnfolderBase]: 3156/5433 cut-off events. [2024-06-21 20:03:24,948 INFO L125 PetriNetUnfolderBase]: For 234971/234974 co-relation queries the response was YES. [2024-06-21 20:03:24,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36931 conditions, 5433 events. 3156/5433 cut-off events. For 234971/234974 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 37044 event pairs, 1141 based on Foata normal form. 4/5430 useless extension candidates. Maximal degree in co-relation 36833. Up to 4578 conditions per place. [2024-06-21 20:03:25,011 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 168 selfloop transitions, 130 changer transitions 0/305 dead transitions. [2024-06-21 20:03:25,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 305 transitions, 5542 flow [2024-06-21 20:03:25,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:03:25,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:03:25,013 INFO L175 Difference]: Start difference. First operand has 202 places, 285 transitions, 4602 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:03:25,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 305 transitions, 5542 flow [2024-06-21 20:03:25,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 305 transitions, 5219 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:25,724 INFO L231 Difference]: Finished difference. Result has 202 places, 288 transitions, 4619 flow [2024-06-21 20:03:25,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4289, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4619, PETRI_PLACES=202, PETRI_TRANSITIONS=288} [2024-06-21 20:03:25,725 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-21 20:03:25,725 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 288 transitions, 4619 flow [2024-06-21 20:03:25,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:25,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:25,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:25,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:03:25,726 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:25,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:25,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1359426099, now seen corresponding path program 4 times [2024-06-21 20:03:25,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:25,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478444863] [2024-06-21 20:03:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:25,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:25,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:25,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478444863] [2024-06-21 20:03:25,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478444863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:25,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:25,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:25,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723449556] [2024-06-21 20:03:25,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:25,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:25,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:25,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:25,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:25,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:25,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 288 transitions, 4619 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:25,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:25,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:25,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:26,687 INFO L124 PetriNetUnfolderBase]: 3151/5425 cut-off events. [2024-06-21 20:03:26,688 INFO L125 PetriNetUnfolderBase]: For 233293/233296 co-relation queries the response was YES. [2024-06-21 20:03:26,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36761 conditions, 5425 events. 3151/5425 cut-off events. For 233293/233296 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 36964 event pairs, 1141 based on Foata normal form. 3/5421 useless extension candidates. Maximal degree in co-relation 36662. Up to 4575 conditions per place. [2024-06-21 20:03:26,761 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 163 selfloop transitions, 134 changer transitions 0/304 dead transitions. [2024-06-21 20:03:26,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 304 transitions, 5411 flow [2024-06-21 20:03:26,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:03:26,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:03:26,763 INFO L175 Difference]: Start difference. First operand has 202 places, 288 transitions, 4619 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:03:26,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 304 transitions, 5411 flow [2024-06-21 20:03:27,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 304 transitions, 5129 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:27,539 INFO L231 Difference]: Finished difference. Result has 205 places, 288 transitions, 4611 flow [2024-06-21 20:03:27,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4611, PETRI_PLACES=205, PETRI_TRANSITIONS=288} [2024-06-21 20:03:27,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-21 20:03:27,540 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 288 transitions, 4611 flow [2024-06-21 20:03:27,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:27,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:27,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:27,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:03:27,541 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:27,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:27,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1365131091, now seen corresponding path program 1 times [2024-06-21 20:03:27,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:27,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672018420] [2024-06-21 20:03:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:27,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:27,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:27,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672018420] [2024-06-21 20:03:27,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672018420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:27,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:27,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:27,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638599983] [2024-06-21 20:03:27,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:27,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:27,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:27,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:27,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:27,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:27,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 288 transitions, 4611 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:27,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:27,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:27,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:28,550 INFO L124 PetriNetUnfolderBase]: 3159/5437 cut-off events. [2024-06-21 20:03:28,550 INFO L125 PetriNetUnfolderBase]: For 243381/243388 co-relation queries the response was YES. [2024-06-21 20:03:28,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37091 conditions, 5437 events. 3159/5437 cut-off events. For 243381/243388 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 37016 event pairs, 1111 based on Foata normal form. 8/5443 useless extension candidates. Maximal degree in co-relation 36991. Up to 4964 conditions per place. [2024-06-21 20:03:28,614 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 276 selfloop transitions, 18 changer transitions 0/301 dead transitions. [2024-06-21 20:03:28,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 301 transitions, 5271 flow [2024-06-21 20:03:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-21 20:03:28,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 20:03:28,615 INFO L175 Difference]: Start difference. First operand has 205 places, 288 transitions, 4611 flow. Second operand 6 states and 132 transitions. [2024-06-21 20:03:28,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 301 transitions, 5271 flow [2024-06-21 20:03:29,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 301 transitions, 4898 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 20:03:29,325 INFO L231 Difference]: Finished difference. Result has 203 places, 290 transitions, 4329 flow [2024-06-21 20:03:29,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4238, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4329, PETRI_PLACES=203, PETRI_TRANSITIONS=290} [2024-06-21 20:03:29,326 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-21 20:03:29,326 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 290 transitions, 4329 flow [2024-06-21 20:03:29,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:29,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:29,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:03:29,326 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:29,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:29,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1350846291, now seen corresponding path program 2 times [2024-06-21 20:03:29,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:29,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385330102] [2024-06-21 20:03:29,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:29,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:29,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:29,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385330102] [2024-06-21 20:03:29,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385330102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:29,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:29,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:29,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195387145] [2024-06-21 20:03:29,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:29,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:29,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:29,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:29,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:29,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 290 transitions, 4329 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:29,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:29,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:30,335 INFO L124 PetriNetUnfolderBase]: 3154/5430 cut-off events. [2024-06-21 20:03:30,335 INFO L125 PetriNetUnfolderBase]: For 249631/249638 co-relation queries the response was YES. [2024-06-21 20:03:30,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36794 conditions, 5430 events. 3154/5430 cut-off events. For 249631/249638 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36956 event pairs, 1076 based on Foata normal form. 8/5436 useless extension candidates. Maximal degree in co-relation 36693. Up to 4937 conditions per place. [2024-06-21 20:03:30,397 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 275 selfloop transitions, 22 changer transitions 0/304 dead transitions. [2024-06-21 20:03:30,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 304 transitions, 5001 flow [2024-06-21 20:03:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-21 20:03:30,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-21 20:03:30,398 INFO L175 Difference]: Start difference. First operand has 203 places, 290 transitions, 4329 flow. Second operand 6 states and 133 transitions. [2024-06-21 20:03:30,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 304 transitions, 5001 flow [2024-06-21 20:03:31,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 304 transitions, 4926 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:31,118 INFO L231 Difference]: Finished difference. Result has 205 places, 292 transitions, 4357 flow [2024-06-21 20:03:31,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4357, PETRI_PLACES=205, PETRI_TRANSITIONS=292} [2024-06-21 20:03:31,119 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-21 20:03:31,119 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 292 transitions, 4357 flow [2024-06-21 20:03:31,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:31,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:31,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:03:31,120 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:31,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:31,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1633424099, now seen corresponding path program 1 times [2024-06-21 20:03:31,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:31,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004594178] [2024-06-21 20:03:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:31,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:31,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:31,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004594178] [2024-06-21 20:03:31,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004594178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:31,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:31,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:31,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461781531] [2024-06-21 20:03:31,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:31,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:31,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:31,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:31,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:31,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:31,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 292 transitions, 4357 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:31,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:31,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:32,033 INFO L124 PetriNetUnfolderBase]: 3162/5437 cut-off events. [2024-06-21 20:03:32,034 INFO L125 PetriNetUnfolderBase]: For 260717/260717 co-relation queries the response was YES. [2024-06-21 20:03:32,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37171 conditions, 5437 events. 3162/5437 cut-off events. For 260717/260717 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36886 event pairs, 1067 based on Foata normal form. 2/5438 useless extension candidates. Maximal degree in co-relation 37069. Up to 4863 conditions per place. [2024-06-21 20:03:32,089 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 271 selfloop transitions, 48 changer transitions 0/326 dead transitions. [2024-06-21 20:03:32,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 326 transitions, 5327 flow [2024-06-21 20:03:32,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:03:32,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:03:32,090 INFO L175 Difference]: Start difference. First operand has 205 places, 292 transitions, 4357 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:03:32,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 326 transitions, 5327 flow [2024-06-21 20:03:32,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 326 transitions, 5238 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:32,964 INFO L231 Difference]: Finished difference. Result has 209 places, 297 transitions, 4503 flow [2024-06-21 20:03:32,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4270, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4503, PETRI_PLACES=209, PETRI_TRANSITIONS=297} [2024-06-21 20:03:32,965 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-21 20:03:32,965 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 297 transitions, 4503 flow [2024-06-21 20:03:32,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:32,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:32,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:32,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:03:32,965 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:32,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:32,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1148539243, now seen corresponding path program 2 times [2024-06-21 20:03:32,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:32,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651269217] [2024-06-21 20:03:32,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:32,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:33,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:33,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651269217] [2024-06-21 20:03:33,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651269217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:33,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:33,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:33,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678864559] [2024-06-21 20:03:33,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:33,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:33,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:33,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:33,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:33,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:33,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 297 transitions, 4503 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:33,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:33,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:33,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand