./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe032_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe032_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe032_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-76401ed-m [2024-06-20 15:28:00,439 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:28:00,494 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:28:00,498 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:28:00,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:28:00,528 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:28:00,529 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:28:00,529 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:28:00,529 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:28:00,532 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:28:00,533 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:28:00,533 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:28:00,534 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:28:00,535 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:28:00,535 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:28:00,535 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:28:00,535 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:28:00,536 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:28:00,536 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:28:00,536 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:28:00,537 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:28:00,537 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:28:00,538 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:28:00,538 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:28:00,538 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:28:00,538 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:28:00,538 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:28:00,539 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:28:00,539 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:28:00,539 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:28:00,540 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:28:00,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:28:00,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:28:00,541 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:28:00,541 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:28:00,541 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:28:00,541 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:28:00,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:28:00,541 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:28:00,542 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:28:00,542 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:28:00,542 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:28:00,542 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:28:00,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:28:00,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:28:00,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:28:00,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:28:00,761 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:28:00,761 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:28:00,762 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-20 15:28:01,745 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:28:01,970 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:28:01,973 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-20 15:28:01,990 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aadba2e3/98050a304d614f9cb4a609dfb508b686/FLAG7c8767833 [2024-06-20 15:28:02,004 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aadba2e3/98050a304d614f9cb4a609dfb508b686 [2024-06-20 15:28:02,006 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:28:02,006 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:28:02,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe032_tso.yml/witness.yml [2024-06-20 15:28:02,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:28:02,107 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:28:02,107 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:28:02,108 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:28:02,111 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:28:02,112 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:28:02" (1/2) ... [2024-06-20 15:28:02,112 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c11c6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:28:02, skipping insertion in model container [2024-06-20 15:28:02,113 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:28:02" (1/2) ... [2024-06-20 15:28:02,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d33bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:28:02, skipping insertion in model container [2024-06-20 15:28:02,114 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:28:02" (2/2) ... [2024-06-20 15:28:02,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c11c6cd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02, skipping insertion in model container [2024-06-20 15:28:02,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:28:02" (2/2) ... [2024-06-20 15:28:02,115 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:28:02,147 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:28:02,148 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 15:28:02,149 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 15:28:02,149 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 15:28:02,149 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:28:02,149 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-20 15:28:02,190 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:28:02,476 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:28:02,483 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:28:02,575 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:28:02,606 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:28:02,606 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02 WrapperNode [2024-06-20 15:28:02,607 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:28:02,607 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:28:02,607 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:28:02,608 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:28:02,613 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 20.06 03:28:02" (1/1) ... [2024-06-20 15:28:02,630 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 20.06 03:28:02" (1/1) ... [2024-06-20 15:28:02,653 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-20 15:28:02,654 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:28:02,654 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:28:02,654 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:28:02,654 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:28:02,681 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02" (1/1) ... [2024-06-20 15:28:02,681 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02" (1/1) ... [2024-06-20 15:28:02,696 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02" (1/1) ... [2024-06-20 15:28:02,708 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]. [2024-06-20 15:28:02,708 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02" (1/1) ... [2024-06-20 15:28:02,709 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02" (1/1) ... [2024-06-20 15:28:02,719 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02" (1/1) ... [2024-06-20 15:28:02,725 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02" (1/1) ... [2024-06-20 15:28:02,735 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02" (1/1) ... [2024-06-20 15:28:02,736 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02" (1/1) ... [2024-06-20 15:28:02,738 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:28:02,742 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:28:02,742 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:28:02,757 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:28:02,758 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02" (1/1) ... [2024-06-20 15:28:02,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:28:02,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:28:02,810 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) [2024-06-20 15:28:02,876 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 [2024-06-20 15:28:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:28:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:28:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:28:02,890 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:28:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:28:02,891 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:28:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:28:02,891 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:28:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:28:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:28:02,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:28:02,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:28:02,892 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:28:03,015 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:28:03,018 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:28:03,224 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:28:03,225 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:28:03,313 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:28:03,314 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:28:03,314 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:28:03 BoogieIcfgContainer [2024-06-20 15:28:03,314 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:28:03,317 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:28:03,317 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:28:03,319 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:28:03,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:28:02" (1/4) ... [2024-06-20 15:28:03,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e7116d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:28:03, skipping insertion in model container [2024-06-20 15:28:03,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:28:02" (2/4) ... [2024-06-20 15:28:03,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e7116d6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:28:03, skipping insertion in model container [2024-06-20 15:28:03,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:28:02" (3/4) ... [2024-06-20 15:28:03,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e7116d6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:28:03, skipping insertion in model container [2024-06-20 15:28:03,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:28:03" (4/4) ... [2024-06-20 15:28:03,322 INFO L112 eAbstractionObserver]: Analyzing ICFG safe032_tso.i [2024-06-20 15:28:03,335 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:28:03,335 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:28:03,335 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:28:03,380 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:28:03,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 15:28:03,430 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 15:28:03,430 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:28:03,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:28:03,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 15:28:03,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 15:28:03,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:28:03,456 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;@6cc623d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:28:03,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:28:03,461 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:28:03,461 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:28:03,461 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:28:03,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:03,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:28:03,463 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)] === [2024-06-20 15:28:03,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:03,467 INFO L85 PathProgramCache]: Analyzing trace with hash 219070604, now seen corresponding path program 1 times [2024-06-20 15:28:03,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:03,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175140221] [2024-06-20 15:28:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:03,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:03,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:03,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175140221] [2024-06-20 15:28:03,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175140221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:03,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:03,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:28:03,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14539668] [2024-06-20 15:28:03,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:03,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:28:03,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:28:03,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:28:03,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-06-20 15:28:03,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:03,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:03,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-06-20 15:28:03,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:04,125 INFO L124 PetriNetUnfolderBase]: 575/990 cut-off events. [2024-06-20 15:28:04,126 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-20 15:28:04,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1930 conditions, 990 events. 575/990 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5172 event pairs, 361 based on Foata normal form. 1/922 useless extension candidates. Maximal degree in co-relation 1918. Up to 885 conditions per place. [2024-06-20 15:28:04,137 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 28 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-20 15:28:04,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 165 flow [2024-06-20 15:28:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:28:04,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:28:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-06-20 15:28:04,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7063492063492064 [2024-06-20 15:28:04,149 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 89 transitions. [2024-06-20 15:28:04,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 165 flow [2024-06-20 15:28:04,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:04,154 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 15:28:04,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-20 15:28:04,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 15:28:04,160 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 15:28:04,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:04,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:04,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:04,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:28:04,161 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)] === [2024-06-20 15:28:04,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:04,162 INFO L85 PathProgramCache]: Analyzing trace with hash 73488363, now seen corresponding path program 1 times [2024-06-20 15:28:04,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:04,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217867647] [2024-06-20 15:28:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:04,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:04,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:04,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217867647] [2024-06-20 15:28:04,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217867647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:04,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:04,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:28:04,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646301683] [2024-06-20 15:28:04,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:04,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:28:04,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:28:04,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:28:04,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-06-20 15:28:04,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:04,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:04,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-06-20 15:28:04,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:04,530 INFO L124 PetriNetUnfolderBase]: 569/966 cut-off events. [2024-06-20 15:28:04,530 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-06-20 15:28:04,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 966 events. 569/966 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4919 event pairs, 293 based on Foata normal form. 3/937 useless extension candidates. Maximal degree in co-relation 2189. Up to 861 conditions per place. [2024-06-20 15:28:04,535 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 35 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-20 15:28:04,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 232 flow [2024-06-20 15:28:04,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:28:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:28:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-20 15:28:04,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-06-20 15:28:04,541 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 117 transitions. [2024-06-20 15:28:04,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 232 flow [2024-06-20 15:28:04,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:28:04,545 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 15:28:04,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-20 15:28:04,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 15:28:04,547 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 15:28:04,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:04,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:04,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:04,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:28:04,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:04,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:04,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1951982098, now seen corresponding path program 1 times [2024-06-20 15:28:04,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:04,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215447283] [2024-06-20 15:28:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:04,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:04,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:04,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215447283] [2024-06-20 15:28:04,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215447283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:04,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:04,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:28:04,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166097761] [2024-06-20 15:28:04,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:04,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:28:04,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:04,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:28:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:28:04,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:04,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 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) [2024-06-20 15:28:04,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:04,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:04,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:04,883 INFO L124 PetriNetUnfolderBase]: 936/1529 cut-off events. [2024-06-20 15:28:04,884 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2024-06-20 15:28:04,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3853 conditions, 1529 events. 936/1529 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7770 event pairs, 533 based on Foata normal form. 3/1530 useless extension candidates. Maximal degree in co-relation 3839. Up to 1395 conditions per place. [2024-06-20 15:28:04,892 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-20 15:28:04,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 300 flow [2024-06-20 15:28:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:28:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:28:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-20 15:28:04,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-06-20 15:28:04,896 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 4 states and 111 transitions. [2024-06-20 15:28:04,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 300 flow [2024-06-20 15:28:04,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 286 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:28:04,899 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 202 flow [2024-06-20 15:28:04,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-06-20 15:28:04,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-20 15:28:04,900 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 202 flow [2024-06-20 15:28:04,900 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) [2024-06-20 15:28:04,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:04,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:04,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:28:04,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:04,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:04,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1501446107, now seen corresponding path program 1 times [2024-06-20 15:28:04,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:04,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870583988] [2024-06-20 15:28:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:04,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:05,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:05,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870583988] [2024-06-20 15:28:05,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870583988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:05,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:05,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:05,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895141545] [2024-06-20 15:28:05,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:05,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:05,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:05,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:05,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:05,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-20 15:28:05,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-20 15:28:05,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:05,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-20 15:28:05,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:05,301 INFO L124 PetriNetUnfolderBase]: 857/1493 cut-off events. [2024-06-20 15:28:05,301 INFO L125 PetriNetUnfolderBase]: For 1498/1498 co-relation queries the response was YES. [2024-06-20 15:28:05,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4117 conditions, 1493 events. 857/1493 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7940 event pairs, 254 based on Foata normal form. 6/1463 useless extension candidates. Maximal degree in co-relation 4101. Up to 1227 conditions per place. [2024-06-20 15:28:05,310 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-20 15:28:05,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 77 transitions, 418 flow [2024-06-20 15:28:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-20 15:28:05,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-20 15:28:05,311 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 202 flow. Second operand 6 states and 164 transitions. [2024-06-20 15:28:05,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 77 transitions, 418 flow [2024-06-20 15:28:05,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 77 transitions, 412 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-20 15:28:05,315 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 257 flow [2024-06-20 15:28:05,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=257, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-20 15:28:05,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-20 15:28:05,316 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 257 flow [2024-06-20 15:28:05,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-20 15:28:05,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:05,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:05,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:28:05,317 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)] === [2024-06-20 15:28:05,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:05,317 INFO L85 PathProgramCache]: Analyzing trace with hash 408460797, now seen corresponding path program 1 times [2024-06-20 15:28:05,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:05,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753993539] [2024-06-20 15:28:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:05,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:05,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:05,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753993539] [2024-06-20 15:28:05,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753993539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:05,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:05,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:28:05,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22246029] [2024-06-20 15:28:05,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:05,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:28:05,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:28:05,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:28:05,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:05,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:05,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:05,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:05,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:05,594 INFO L124 PetriNetUnfolderBase]: 968/1626 cut-off events. [2024-06-20 15:28:05,595 INFO L125 PetriNetUnfolderBase]: For 2753/2753 co-relation queries the response was YES. [2024-06-20 15:28:05,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5011 conditions, 1626 events. 968/1626 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8546 event pairs, 346 based on Foata normal form. 4/1622 useless extension candidates. Maximal degree in co-relation 4991. Up to 1333 conditions per place. [2024-06-20 15:28:05,605 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 57 selfloop transitions, 22 changer transitions 0/88 dead transitions. [2024-06-20 15:28:05,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 88 transitions, 575 flow [2024-06-20 15:28:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:28:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:28:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-20 15:28:05,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-20 15:28:05,606 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 257 flow. Second operand 5 states and 144 transitions. [2024-06-20 15:28:05,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 88 transitions, 575 flow [2024-06-20 15:28:05,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 88 transitions, 544 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:05,610 INFO L231 Difference]: Finished difference. Result has 59 places, 65 transitions, 383 flow [2024-06-20 15:28:05,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=383, PETRI_PLACES=59, PETRI_TRANSITIONS=65} [2024-06-20 15:28:05,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-20 15:28:05,611 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 65 transitions, 383 flow [2024-06-20 15:28:05,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:05,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:05,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:05,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:28:05,612 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)] === [2024-06-20 15:28:05,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1067838237, now seen corresponding path program 2 times [2024-06-20 15:28:05,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:05,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312016146] [2024-06-20 15:28:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:05,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:05,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:05,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312016146] [2024-06-20 15:28:05,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312016146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:05,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:05,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:28:05,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181059940] [2024-06-20 15:28:05,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:05,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:28:05,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:28:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:28:05,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:05,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 65 transitions, 383 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:05,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:05,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:05,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:05,887 INFO L124 PetriNetUnfolderBase]: 993/1672 cut-off events. [2024-06-20 15:28:05,888 INFO L125 PetriNetUnfolderBase]: For 4535/4535 co-relation queries the response was YES. [2024-06-20 15:28:05,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5991 conditions, 1672 events. 993/1672 cut-off events. For 4535/4535 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8857 event pairs, 374 based on Foata normal form. 4/1670 useless extension candidates. Maximal degree in co-relation 5968. Up to 1359 conditions per place. [2024-06-20 15:28:05,899 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 30 changer transitions 0/92 dead transitions. [2024-06-20 15:28:05,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 691 flow [2024-06-20 15:28:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:28:05,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:28:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-20 15:28:05,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 15:28:05,901 INFO L175 Difference]: Start difference. First operand has 59 places, 65 transitions, 383 flow. Second operand 5 states and 140 transitions. [2024-06-20 15:28:05,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 691 flow [2024-06-20 15:28:05,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 661 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-20 15:28:05,911 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 546 flow [2024-06-20 15:28:05,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-06-20 15:28:05,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-20 15:28:05,914 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 546 flow [2024-06-20 15:28:05,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:05,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:05,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:05,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:28:05,915 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)] === [2024-06-20 15:28:05,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:05,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1045936365, now seen corresponding path program 1 times [2024-06-20 15:28:05,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:05,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365043826] [2024-06-20 15:28:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:05,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:06,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:06,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365043826] [2024-06-20 15:28:06,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365043826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:06,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:06,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:28:06,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776788695] [2024-06-20 15:28:06,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:06,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:28:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:06,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:28:06,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:28:06,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:06,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 546 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:06,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:06,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:06,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:06,218 INFO L124 PetriNetUnfolderBase]: 995/1682 cut-off events. [2024-06-20 15:28:06,218 INFO L125 PetriNetUnfolderBase]: For 5890/5890 co-relation queries the response was YES. [2024-06-20 15:28:06,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6465 conditions, 1682 events. 995/1682 cut-off events. For 5890/5890 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8883 event pairs, 343 based on Foata normal form. 3/1683 useless extension candidates. Maximal degree in co-relation 6437. Up to 1456 conditions per place. [2024-06-20 15:28:06,233 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 72 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2024-06-20 15:28:06,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 98 transitions, 822 flow [2024-06-20 15:28:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:28:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:28:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-20 15:28:06,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-20 15:28:06,235 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 546 flow. Second operand 5 states and 135 transitions. [2024-06-20 15:28:06,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 98 transitions, 822 flow [2024-06-20 15:28:06,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 789 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-20 15:28:06,243 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 610 flow [2024-06-20 15:28:06,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=610, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2024-06-20 15:28:06,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-20 15:28:06,245 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 610 flow [2024-06-20 15:28:06,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:06,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:06,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:06,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:28:06,245 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:06,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:06,246 INFO L85 PathProgramCache]: Analyzing trace with hash -628573029, now seen corresponding path program 1 times [2024-06-20 15:28:06,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:06,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921438534] [2024-06-20 15:28:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:06,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:06,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:06,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921438534] [2024-06-20 15:28:06,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921438534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:06,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:06,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:28:06,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060506295] [2024-06-20 15:28:06,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:06,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:28:06,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:06,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:28:06,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:28:06,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:06,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 610 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:06,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:06,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:06,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:06,534 INFO L124 PetriNetUnfolderBase]: 983/1653 cut-off events. [2024-06-20 15:28:06,534 INFO L125 PetriNetUnfolderBase]: For 7065/7065 co-relation queries the response was YES. [2024-06-20 15:28:06,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6632 conditions, 1653 events. 983/1653 cut-off events. For 7065/7065 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8639 event pairs, 355 based on Foata normal form. 2/1651 useless extension candidates. Maximal degree in co-relation 6602. Up to 1462 conditions per place. [2024-06-20 15:28:06,548 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 70 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2024-06-20 15:28:06,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 90 transitions, 792 flow [2024-06-20 15:28:06,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:28:06,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:28:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-20 15:28:06,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:28:06,550 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 610 flow. Second operand 4 states and 105 transitions. [2024-06-20 15:28:06,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 90 transitions, 792 flow [2024-06-20 15:28:06,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 762 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-20 15:28:06,561 INFO L231 Difference]: Finished difference. Result has 73 places, 82 transitions, 610 flow [2024-06-20 15:28:06,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=610, PETRI_PLACES=73, PETRI_TRANSITIONS=82} [2024-06-20 15:28:06,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-20 15:28:06,563 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 82 transitions, 610 flow [2024-06-20 15:28:06,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:06,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:06,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:06,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:28:06,564 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)] === [2024-06-20 15:28:06,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:06,564 INFO L85 PathProgramCache]: Analyzing trace with hash -199330566, now seen corresponding path program 1 times [2024-06-20 15:28:06,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:06,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484989465] [2024-06-20 15:28:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:06,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:06,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:06,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484989465] [2024-06-20 15:28:06,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484989465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:06,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:06,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:06,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235571576] [2024-06-20 15:28:06,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:06,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:06,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:06,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:06,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:06,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:06,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:06,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:06,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:06,953 INFO L124 PetriNetUnfolderBase]: 1017/1708 cut-off events. [2024-06-20 15:28:06,954 INFO L125 PetriNetUnfolderBase]: For 8020/8020 co-relation queries the response was YES. [2024-06-20 15:28:06,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6973 conditions, 1708 events. 1017/1708 cut-off events. For 8020/8020 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8944 event pairs, 334 based on Foata normal form. 3/1709 useless extension candidates. Maximal degree in co-relation 6940. Up to 1477 conditions per place. [2024-06-20 15:28:06,972 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 90 selfloop transitions, 18 changer transitions 0/117 dead transitions. [2024-06-20 15:28:06,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 974 flow [2024-06-20 15:28:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:28:06,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-20 15:28:06,977 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 610 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:28:06,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 974 flow [2024-06-20 15:28:06,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 117 transitions, 946 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:06,988 INFO L231 Difference]: Finished difference. Result has 78 places, 90 transitions, 708 flow [2024-06-20 15:28:06,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=708, PETRI_PLACES=78, PETRI_TRANSITIONS=90} [2024-06-20 15:28:06,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-20 15:28:06,989 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 90 transitions, 708 flow [2024-06-20 15:28:06,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:06,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:06,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:06,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:28:06,990 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)] === [2024-06-20 15:28:06,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:06,991 INFO L85 PathProgramCache]: Analyzing trace with hash -194568966, now seen corresponding path program 2 times [2024-06-20 15:28:06,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:06,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633167139] [2024-06-20 15:28:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:06,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:07,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:07,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633167139] [2024-06-20 15:28:07,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633167139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:07,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:07,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:07,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13251772] [2024-06-20 15:28:07,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:07,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:07,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:07,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:07,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:07,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:07,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 90 transitions, 708 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:07,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:07,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:07,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:07,372 INFO L124 PetriNetUnfolderBase]: 1074/1810 cut-off events. [2024-06-20 15:28:07,372 INFO L125 PetriNetUnfolderBase]: For 10612/10612 co-relation queries the response was YES. [2024-06-20 15:28:07,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7903 conditions, 1810 events. 1074/1810 cut-off events. For 10612/10612 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9715 event pairs, 333 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 7869. Up to 1342 conditions per place. [2024-06-20 15:28:07,384 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 52 changer transitions 0/135 dead transitions. [2024-06-20 15:28:07,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 135 transitions, 1260 flow [2024-06-20 15:28:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-20 15:28:07,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6865079365079365 [2024-06-20 15:28:07,385 INFO L175 Difference]: Start difference. First operand has 78 places, 90 transitions, 708 flow. Second operand 6 states and 173 transitions. [2024-06-20 15:28:07,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 135 transitions, 1260 flow [2024-06-20 15:28:07,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 135 transitions, 1208 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:07,397 INFO L231 Difference]: Finished difference. Result has 82 places, 107 transitions, 943 flow [2024-06-20 15:28:07,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=943, PETRI_PLACES=82, PETRI_TRANSITIONS=107} [2024-06-20 15:28:07,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-20 15:28:07,398 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 107 transitions, 943 flow [2024-06-20 15:28:07,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:07,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:07,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:07,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:28:07,398 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)] === [2024-06-20 15:28:07,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:07,399 INFO L85 PathProgramCache]: Analyzing trace with hash -831125468, now seen corresponding path program 1 times [2024-06-20 15:28:07,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:07,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839899484] [2024-06-20 15:28:07,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:07,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:07,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:07,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839899484] [2024-06-20 15:28:07,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839899484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:07,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:07,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:07,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797287134] [2024-06-20 15:28:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:07,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:07,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:07,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:07,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 107 transitions, 943 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:07,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:07,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:07,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:07,735 INFO L124 PetriNetUnfolderBase]: 1107/1870 cut-off events. [2024-06-20 15:28:07,735 INFO L125 PetriNetUnfolderBase]: For 13716/13716 co-relation queries the response was YES. [2024-06-20 15:28:07,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8940 conditions, 1870 events. 1107/1870 cut-off events. For 13716/13716 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10171 event pairs, 324 based on Foata normal form. 4/1865 useless extension candidates. Maximal degree in co-relation 8903. Up to 1424 conditions per place. [2024-06-20 15:28:07,747 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 41 changer transitions 0/146 dead transitions. [2024-06-20 15:28:07,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 146 transitions, 1453 flow [2024-06-20 15:28:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-20 15:28:07,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-20 15:28:07,749 INFO L175 Difference]: Start difference. First operand has 82 places, 107 transitions, 943 flow. Second operand 6 states and 171 transitions. [2024-06-20 15:28:07,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 146 transitions, 1453 flow [2024-06-20 15:28:07,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 146 transitions, 1393 flow, removed 30 selfloop flow, removed 0 redundant places. [2024-06-20 15:28:07,765 INFO L231 Difference]: Finished difference. Result has 89 places, 120 transitions, 1106 flow [2024-06-20 15:28:07,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1106, PETRI_PLACES=89, PETRI_TRANSITIONS=120} [2024-06-20 15:28:07,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-20 15:28:07,766 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 120 transitions, 1106 flow [2024-06-20 15:28:07,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:07,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:07,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:07,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:28:07,766 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:07,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:07,767 INFO L85 PathProgramCache]: Analyzing trace with hash -747910820, now seen corresponding path program 3 times [2024-06-20 15:28:07,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:07,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72813662] [2024-06-20 15:28:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:07,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:07,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:07,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72813662] [2024-06-20 15:28:07,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72813662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:07,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:07,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:07,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38179310] [2024-06-20 15:28:07,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:07,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:07,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:07,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:07,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:07,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 120 transitions, 1106 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:07,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:07,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:07,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:08,090 INFO L124 PetriNetUnfolderBase]: 1122/1897 cut-off events. [2024-06-20 15:28:08,090 INFO L125 PetriNetUnfolderBase]: For 15861/15861 co-relation queries the response was YES. [2024-06-20 15:28:08,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9533 conditions, 1897 events. 1122/1897 cut-off events. For 15861/15861 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10371 event pairs, 342 based on Foata normal form. 4/1895 useless extension candidates. Maximal degree in co-relation 9492. Up to 1407 conditions per place. [2024-06-20 15:28:08,104 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 85 selfloop transitions, 56 changer transitions 0/150 dead transitions. [2024-06-20 15:28:08,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 150 transitions, 1578 flow [2024-06-20 15:28:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-20 15:28:08,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6626984126984127 [2024-06-20 15:28:08,105 INFO L175 Difference]: Start difference. First operand has 89 places, 120 transitions, 1106 flow. Second operand 6 states and 167 transitions. [2024-06-20 15:28:08,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 150 transitions, 1578 flow [2024-06-20 15:28:08,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 150 transitions, 1529 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-20 15:28:08,124 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1309 flow [2024-06-20 15:28:08,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1309, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-06-20 15:28:08,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-20 15:28:08,125 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1309 flow [2024-06-20 15:28:08,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:08,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:08,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:08,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:28:08,126 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)] === [2024-06-20 15:28:08,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:08,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1916727322, now seen corresponding path program 2 times [2024-06-20 15:28:08,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:08,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348022313] [2024-06-20 15:28:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:08,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:08,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:08,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348022313] [2024-06-20 15:28:08,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348022313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:08,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:08,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:08,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718129570] [2024-06-20 15:28:08,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:08,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:08,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:08,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:08,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:08,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1309 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:08,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:08,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:08,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:08,482 INFO L124 PetriNetUnfolderBase]: 1177/2001 cut-off events. [2024-06-20 15:28:08,482 INFO L125 PetriNetUnfolderBase]: For 18973/18973 co-relation queries the response was YES. [2024-06-20 15:28:08,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10489 conditions, 2001 events. 1177/2001 cut-off events. For 18973/18973 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11090 event pairs, 330 based on Foata normal form. 4/2001 useless extension candidates. Maximal degree in co-relation 10444. Up to 1498 conditions per place. [2024-06-20 15:28:08,495 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 52 changer transitions 0/166 dead transitions. [2024-06-20 15:28:08,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 166 transitions, 1911 flow [2024-06-20 15:28:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-20 15:28:08,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746031746031746 [2024-06-20 15:28:08,497 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1309 flow. Second operand 6 states and 170 transitions. [2024-06-20 15:28:08,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 166 transitions, 1911 flow [2024-06-20 15:28:08,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1832 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 15:28:08,522 INFO L231 Difference]: Finished difference. Result has 100 places, 143 transitions, 1515 flow [2024-06-20 15:28:08,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1515, PETRI_PLACES=100, PETRI_TRANSITIONS=143} [2024-06-20 15:28:08,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-20 15:28:08,523 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 143 transitions, 1515 flow [2024-06-20 15:28:08,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:08,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:08,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:08,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:28:08,525 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)] === [2024-06-20 15:28:08,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:08,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1925298202, now seen corresponding path program 3 times [2024-06-20 15:28:08,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:08,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210429843] [2024-06-20 15:28:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:08,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:08,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:08,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210429843] [2024-06-20 15:28:08,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210429843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:08,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:08,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:08,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163458112] [2024-06-20 15:28:08,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:08,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:08,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:08,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:08,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:08,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 143 transitions, 1515 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:08,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:08,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:08,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:08,877 INFO L124 PetriNetUnfolderBase]: 1168/1989 cut-off events. [2024-06-20 15:28:08,877 INFO L125 PetriNetUnfolderBase]: For 21139/21139 co-relation queries the response was YES. [2024-06-20 15:28:08,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10655 conditions, 1989 events. 1168/1989 cut-off events. For 21139/21139 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11024 event pairs, 330 based on Foata normal form. 4/1989 useless extension candidates. Maximal degree in co-relation 10607. Up to 1492 conditions per place. [2024-06-20 15:28:08,893 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 51 changer transitions 0/165 dead transitions. [2024-06-20 15:28:08,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 165 transitions, 1959 flow [2024-06-20 15:28:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-20 15:28:08,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 15:28:08,894 INFO L175 Difference]: Start difference. First operand has 100 places, 143 transitions, 1515 flow. Second operand 6 states and 168 transitions. [2024-06-20 15:28:08,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 165 transitions, 1959 flow [2024-06-20 15:28:08,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 165 transitions, 1907 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-06-20 15:28:08,925 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1576 flow [2024-06-20 15:28:08,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1576, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-20 15:28:08,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-20 15:28:08,925 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1576 flow [2024-06-20 15:28:08,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:08,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:08,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:08,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:28:08,926 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)] === [2024-06-20 15:28:08,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:08,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1925309114, now seen corresponding path program 1 times [2024-06-20 15:28:08,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:08,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768026237] [2024-06-20 15:28:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:08,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:09,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:09,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768026237] [2024-06-20 15:28:09,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768026237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:09,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:09,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:09,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491332847] [2024-06-20 15:28:09,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:09,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:09,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:09,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:09,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:09,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:09,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1576 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:09,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:09,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:09,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:09,288 INFO L124 PetriNetUnfolderBase]: 1168/1989 cut-off events. [2024-06-20 15:28:09,289 INFO L125 PetriNetUnfolderBase]: For 23742/23742 co-relation queries the response was YES. [2024-06-20 15:28:09,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10997 conditions, 1989 events. 1168/1989 cut-off events. For 23742/23742 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10959 event pairs, 314 based on Foata normal form. 6/1993 useless extension candidates. Maximal degree in co-relation 10946. Up to 1681 conditions per place. [2024-06-20 15:28:09,305 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 138 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-06-20 15:28:09,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 167 transitions, 2020 flow [2024-06-20 15:28:09,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:28:09,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-20 15:28:09,306 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1576 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:28:09,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 167 transitions, 2020 flow [2024-06-20 15:28:09,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 167 transitions, 1909 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:09,333 INFO L231 Difference]: Finished difference. Result has 108 places, 146 transitions, 1567 flow [2024-06-20 15:28:09,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1567, PETRI_PLACES=108, PETRI_TRANSITIONS=146} [2024-06-20 15:28:09,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-20 15:28:09,333 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 146 transitions, 1567 flow [2024-06-20 15:28:09,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:09,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:09,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:09,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:28:09,334 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:09,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:09,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1989073823, now seen corresponding path program 1 times [2024-06-20 15:28:09,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:09,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924231056] [2024-06-20 15:28:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:09,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:09,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:09,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924231056] [2024-06-20 15:28:09,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924231056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:09,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:09,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:28:09,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957079144] [2024-06-20 15:28:09,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:09,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:28:09,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:09,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:28:09,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:28:09,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:09,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 146 transitions, 1567 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:09,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:09,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:09,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:09,631 INFO L124 PetriNetUnfolderBase]: 1160/1967 cut-off events. [2024-06-20 15:28:09,631 INFO L125 PetriNetUnfolderBase]: For 24840/24840 co-relation queries the response was YES. [2024-06-20 15:28:09,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10933 conditions, 1967 events. 1160/1967 cut-off events. For 24840/24840 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10880 event pairs, 332 based on Foata normal form. 4/1962 useless extension candidates. Maximal degree in co-relation 10881. Up to 1613 conditions per place. [2024-06-20 15:28:09,646 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 118 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-06-20 15:28:09,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 157 transitions, 1949 flow [2024-06-20 15:28:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:28:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:28:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-20 15:28:09,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-20 15:28:09,647 INFO L175 Difference]: Start difference. First operand has 108 places, 146 transitions, 1567 flow. Second operand 5 states and 133 transitions. [2024-06-20 15:28:09,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 157 transitions, 1949 flow [2024-06-20 15:28:09,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 157 transitions, 1871 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:09,673 INFO L231 Difference]: Finished difference. Result has 109 places, 146 transitions, 1558 flow [2024-06-20 15:28:09,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1558, PETRI_PLACES=109, PETRI_TRANSITIONS=146} [2024-06-20 15:28:09,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-20 15:28:09,674 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 146 transitions, 1558 flow [2024-06-20 15:28:09,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:09,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:09,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:09,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:28:09,675 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:09,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:09,675 INFO L85 PathProgramCache]: Analyzing trace with hash 563819642, now seen corresponding path program 1 times [2024-06-20 15:28:09,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:09,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216135302] [2024-06-20 15:28:09,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:09,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:09,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:09,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216135302] [2024-06-20 15:28:09,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216135302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:09,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:09,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:28:09,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947562476] [2024-06-20 15:28:09,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:09,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:28:09,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:09,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:28:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:28:09,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:09,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 146 transitions, 1558 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:09,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:09,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:09,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:09,989 INFO L124 PetriNetUnfolderBase]: 1170/1993 cut-off events. [2024-06-20 15:28:09,989 INFO L125 PetriNetUnfolderBase]: For 26096/26096 co-relation queries the response was YES. [2024-06-20 15:28:09,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11176 conditions, 1993 events. 1170/1993 cut-off events. For 26096/26096 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11000 event pairs, 322 based on Foata normal form. 2/1989 useless extension candidates. Maximal degree in co-relation 11123. Up to 1619 conditions per place. [2024-06-20 15:28:10,003 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 124 selfloop transitions, 34 changer transitions 0/167 dead transitions. [2024-06-20 15:28:10,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 167 transitions, 2054 flow [2024-06-20 15:28:10,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:28:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:28:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-20 15:28:10,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-20 15:28:10,004 INFO L175 Difference]: Start difference. First operand has 109 places, 146 transitions, 1558 flow. Second operand 5 states and 138 transitions. [2024-06-20 15:28:10,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 167 transitions, 2054 flow [2024-06-20 15:28:10,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 167 transitions, 1940 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:10,038 INFO L231 Difference]: Finished difference. Result has 108 places, 150 transitions, 1597 flow [2024-06-20 15:28:10,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1597, PETRI_PLACES=108, PETRI_TRANSITIONS=150} [2024-06-20 15:28:10,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-20 15:28:10,038 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 150 transitions, 1597 flow [2024-06-20 15:28:10,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:10,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:10,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:10,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:28:10,039 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:10,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:10,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1531731770, now seen corresponding path program 2 times [2024-06-20 15:28:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:10,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458528610] [2024-06-20 15:28:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:10,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:10,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458528610] [2024-06-20 15:28:10,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458528610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:10,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:10,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:28:10,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290818690] [2024-06-20 15:28:10,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:10,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:28:10,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:10,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:28:10,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:28:10,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:10,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 150 transitions, 1597 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:10,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:10,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:10,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:10,333 INFO L124 PetriNetUnfolderBase]: 1142/1930 cut-off events. [2024-06-20 15:28:10,333 INFO L125 PetriNetUnfolderBase]: For 27273/27273 co-relation queries the response was YES. [2024-06-20 15:28:10,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10791 conditions, 1930 events. 1142/1930 cut-off events. For 27273/27273 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10525 event pairs, 336 based on Foata normal form. 4/1925 useless extension candidates. Maximal degree in co-relation 10741. Up to 1589 conditions per place. [2024-06-20 15:28:10,347 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 118 selfloop transitions, 33 changer transitions 0/160 dead transitions. [2024-06-20 15:28:10,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 160 transitions, 1957 flow [2024-06-20 15:28:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:28:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:28:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-20 15:28:10,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:28:10,348 INFO L175 Difference]: Start difference. First operand has 108 places, 150 transitions, 1597 flow. Second operand 5 states and 132 transitions. [2024-06-20 15:28:10,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 160 transitions, 1957 flow [2024-06-20 15:28:10,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 160 transitions, 1898 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-20 15:28:10,381 INFO L231 Difference]: Finished difference. Result has 111 places, 150 transitions, 1613 flow [2024-06-20 15:28:10,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1613, PETRI_PLACES=111, PETRI_TRANSITIONS=150} [2024-06-20 15:28:10,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-20 15:28:10,383 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 150 transitions, 1613 flow [2024-06-20 15:28:10,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:10,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:10,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:10,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:28:10,384 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)] === [2024-06-20 15:28:10,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:10,384 INFO L85 PathProgramCache]: Analyzing trace with hash -10456871, now seen corresponding path program 1 times [2024-06-20 15:28:10,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:10,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878820192] [2024-06-20 15:28:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:10,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:10,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:10,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878820192] [2024-06-20 15:28:10,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878820192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:10,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:10,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:10,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190114308] [2024-06-20 15:28:10,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:10,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:10,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:10,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:10,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:10,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:10,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 150 transitions, 1613 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:10,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:10,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:10,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:10,834 INFO L124 PetriNetUnfolderBase]: 1221/2074 cut-off events. [2024-06-20 15:28:10,834 INFO L125 PetriNetUnfolderBase]: For 31356/31356 co-relation queries the response was YES. [2024-06-20 15:28:10,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11669 conditions, 2074 events. 1221/2074 cut-off events. For 31356/31356 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11459 event pairs, 189 based on Foata normal form. 6/2078 useless extension candidates. Maximal degree in co-relation 11618. Up to 1650 conditions per place. [2024-06-20 15:28:10,849 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 23 changer transitions 0/195 dead transitions. [2024-06-20 15:28:10,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 195 transitions, 2291 flow [2024-06-20 15:28:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-20 15:28:10,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-20 15:28:10,850 INFO L175 Difference]: Start difference. First operand has 111 places, 150 transitions, 1613 flow. Second operand 8 states and 212 transitions. [2024-06-20 15:28:10,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 195 transitions, 2291 flow [2024-06-20 15:28:10,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 195 transitions, 2169 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:10,888 INFO L231 Difference]: Finished difference. Result has 114 places, 156 transitions, 1646 flow [2024-06-20 15:28:10,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1646, PETRI_PLACES=114, PETRI_TRANSITIONS=156} [2024-06-20 15:28:10,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-20 15:28:10,889 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 156 transitions, 1646 flow [2024-06-20 15:28:10,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:10,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:10,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:10,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:28:10,890 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)] === [2024-06-20 15:28:10,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:10,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1714077115, now seen corresponding path program 2 times [2024-06-20 15:28:10,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:10,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007129694] [2024-06-20 15:28:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:10,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:11,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:11,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007129694] [2024-06-20 15:28:11,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007129694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:11,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:11,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:11,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027477172] [2024-06-20 15:28:11,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:11,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:11,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:11,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:11,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:11,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:11,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 156 transitions, 1646 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:11,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:11,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:11,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:11,347 INFO L124 PetriNetUnfolderBase]: 1224/2073 cut-off events. [2024-06-20 15:28:11,348 INFO L125 PetriNetUnfolderBase]: For 33029/33029 co-relation queries the response was YES. [2024-06-20 15:28:11,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11983 conditions, 2073 events. 1224/2073 cut-off events. For 33029/33029 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11416 event pairs, 288 based on Foata normal form. 6/2077 useless extension candidates. Maximal degree in co-relation 11930. Up to 1754 conditions per place. [2024-06-20 15:28:11,370 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 161 selfloop transitions, 21 changer transitions 0/191 dead transitions. [2024-06-20 15:28:11,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 191 transitions, 2186 flow [2024-06-20 15:28:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:11,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:28:11,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-20 15:28:11,372 INFO L175 Difference]: Start difference. First operand has 114 places, 156 transitions, 1646 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:28:11,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 191 transitions, 2186 flow [2024-06-20 15:28:11,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 191 transitions, 2086 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:11,422 INFO L231 Difference]: Finished difference. Result has 118 places, 159 transitions, 1660 flow [2024-06-20 15:28:11,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1660, PETRI_PLACES=118, PETRI_TRANSITIONS=159} [2024-06-20 15:28:11,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-20 15:28:11,423 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 159 transitions, 1660 flow [2024-06-20 15:28:11,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:11,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:11,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:11,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:28:11,424 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)] === [2024-06-20 15:28:11,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:11,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1716878585, now seen corresponding path program 1 times [2024-06-20 15:28:11,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:11,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544025075] [2024-06-20 15:28:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:11,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:11,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:11,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544025075] [2024-06-20 15:28:11,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544025075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:11,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:11,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:11,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411175653] [2024-06-20 15:28:11,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:11,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:11,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:11,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:11,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:11,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:11,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 159 transitions, 1660 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:11,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:11,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:11,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:11,832 INFO L124 PetriNetUnfolderBase]: 1250/2117 cut-off events. [2024-06-20 15:28:11,832 INFO L125 PetriNetUnfolderBase]: For 34891/34891 co-relation queries the response was YES. [2024-06-20 15:28:11,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12204 conditions, 2117 events. 1250/2117 cut-off events. For 34891/34891 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11686 event pairs, 273 based on Foata normal form. 3/2118 useless extension candidates. Maximal degree in co-relation 12149. Up to 1797 conditions per place. [2024-06-20 15:28:11,851 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 164 selfloop transitions, 24 changer transitions 0/197 dead transitions. [2024-06-20 15:28:11,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 2242 flow [2024-06-20 15:28:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 15:28:11,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-20 15:28:11,854 INFO L175 Difference]: Start difference. First operand has 118 places, 159 transitions, 1660 flow. Second operand 8 states and 206 transitions. [2024-06-20 15:28:11,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 2242 flow [2024-06-20 15:28:11,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 197 transitions, 2174 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:11,908 INFO L231 Difference]: Finished difference. Result has 120 places, 166 transitions, 1745 flow [2024-06-20 15:28:11,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1745, PETRI_PLACES=120, PETRI_TRANSITIONS=166} [2024-06-20 15:28:11,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-20 15:28:11,909 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 166 transitions, 1745 flow [2024-06-20 15:28:11,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:11,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:11,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:11,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:28:11,910 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)] === [2024-06-20 15:28:11,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1997803929, now seen corresponding path program 3 times [2024-06-20 15:28:11,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:11,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745738489] [2024-06-20 15:28:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:11,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:12,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:12,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745738489] [2024-06-20 15:28:12,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745738489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:12,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:12,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:12,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270780348] [2024-06-20 15:28:12,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:12,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:12,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:12,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:12,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:12,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 166 transitions, 1745 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:12,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:12,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:12,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:12,357 INFO L124 PetriNetUnfolderBase]: 1303/2196 cut-off events. [2024-06-20 15:28:12,358 INFO L125 PetriNetUnfolderBase]: For 41822/41822 co-relation queries the response was YES. [2024-06-20 15:28:12,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12942 conditions, 2196 events. 1303/2196 cut-off events. For 41822/41822 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12129 event pairs, 283 based on Foata normal form. 14/2202 useless extension candidates. Maximal degree in co-relation 12886. Up to 1640 conditions per place. [2024-06-20 15:28:12,377 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 65 changer transitions 0/202 dead transitions. [2024-06-20 15:28:12,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 202 transitions, 2411 flow [2024-06-20 15:28:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:12,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:12,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-20 15:28:12,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2024-06-20 15:28:12,378 INFO L175 Difference]: Start difference. First operand has 120 places, 166 transitions, 1745 flow. Second operand 7 states and 199 transitions. [2024-06-20 15:28:12,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 202 transitions, 2411 flow [2024-06-20 15:28:12,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 202 transitions, 2329 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:12,418 INFO L231 Difference]: Finished difference. Result has 123 places, 169 transitions, 1870 flow [2024-06-20 15:28:12,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1870, PETRI_PLACES=123, PETRI_TRANSITIONS=169} [2024-06-20 15:28:12,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-20 15:28:12,418 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 169 transitions, 1870 flow [2024-06-20 15:28:12,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:12,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:12,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:12,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:28:12,419 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)] === [2024-06-20 15:28:12,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1997808889, now seen corresponding path program 2 times [2024-06-20 15:28:12,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:12,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871854746] [2024-06-20 15:28:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:12,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:12,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:12,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871854746] [2024-06-20 15:28:12,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871854746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:12,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:12,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:12,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995187132] [2024-06-20 15:28:12,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:12,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:12,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:12,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:12,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 169 transitions, 1870 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:12,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:12,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:12,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:12,808 INFO L124 PetriNetUnfolderBase]: 1380/2323 cut-off events. [2024-06-20 15:28:12,808 INFO L125 PetriNetUnfolderBase]: For 46034/46034 co-relation queries the response was YES. [2024-06-20 15:28:12,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14247 conditions, 2323 events. 1380/2323 cut-off events. For 46034/46034 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13044 event pairs, 286 based on Foata normal form. 4/2314 useless extension candidates. Maximal degree in co-relation 14189. Up to 1530 conditions per place. [2024-06-20 15:28:12,826 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 115 selfloop transitions, 99 changer transitions 0/223 dead transitions. [2024-06-20 15:28:12,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 223 transitions, 2932 flow [2024-06-20 15:28:12,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-20 15:28:12,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6938775510204082 [2024-06-20 15:28:12,828 INFO L175 Difference]: Start difference. First operand has 123 places, 169 transitions, 1870 flow. Second operand 7 states and 204 transitions. [2024-06-20 15:28:12,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 223 transitions, 2932 flow [2024-06-20 15:28:12,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 223 transitions, 2765 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:12,883 INFO L231 Difference]: Finished difference. Result has 126 places, 190 transitions, 2207 flow [2024-06-20 15:28:12,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2207, PETRI_PLACES=126, PETRI_TRANSITIONS=190} [2024-06-20 15:28:12,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-20 15:28:12,884 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 190 transitions, 2207 flow [2024-06-20 15:28:12,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:12,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:12,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:12,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:28:12,885 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)] === [2024-06-20 15:28:12,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:12,886 INFO L85 PathProgramCache]: Analyzing trace with hash 2004475129, now seen corresponding path program 3 times [2024-06-20 15:28:12,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:12,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425296756] [2024-06-20 15:28:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:12,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:12,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:12,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425296756] [2024-06-20 15:28:12,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425296756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:12,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:12,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:12,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878641589] [2024-06-20 15:28:12,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:12,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:12,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:12,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:12,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:13,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:13,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 190 transitions, 2207 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:13,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:13,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:13,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:13,292 INFO L124 PetriNetUnfolderBase]: 1369/2308 cut-off events. [2024-06-20 15:28:13,293 INFO L125 PetriNetUnfolderBase]: For 49740/49740 co-relation queries the response was YES. [2024-06-20 15:28:13,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14593 conditions, 2308 events. 1369/2308 cut-off events. For 49740/49740 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12961 event pairs, 286 based on Foata normal form. 4/2299 useless extension candidates. Maximal degree in co-relation 14533. Up to 1521 conditions per place. [2024-06-20 15:28:13,312 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 112 selfloop transitions, 101 changer transitions 0/222 dead transitions. [2024-06-20 15:28:13,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 222 transitions, 2971 flow [2024-06-20 15:28:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-20 15:28:13,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6870748299319728 [2024-06-20 15:28:13,313 INFO L175 Difference]: Start difference. First operand has 126 places, 190 transitions, 2207 flow. Second operand 7 states and 202 transitions. [2024-06-20 15:28:13,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 222 transitions, 2971 flow [2024-06-20 15:28:13,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 222 transitions, 2827 flow, removed 72 selfloop flow, removed 0 redundant places. [2024-06-20 15:28:13,391 INFO L231 Difference]: Finished difference. Result has 133 places, 190 transitions, 2275 flow [2024-06-20 15:28:13,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2275, PETRI_PLACES=133, PETRI_TRANSITIONS=190} [2024-06-20 15:28:13,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-20 15:28:13,392 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 190 transitions, 2275 flow [2024-06-20 15:28:13,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:13,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:13,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:13,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:28:13,393 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)] === [2024-06-20 15:28:13,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2004484057, now seen corresponding path program 1 times [2024-06-20 15:28:13,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:13,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240368549] [2024-06-20 15:28:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:13,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:13,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:13,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240368549] [2024-06-20 15:28:13,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240368549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:13,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:13,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:13,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189109117] [2024-06-20 15:28:13,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:13,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:13,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:13,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:13,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:13,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:13,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 190 transitions, 2275 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:13,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:13,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:13,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:13,904 INFO L124 PetriNetUnfolderBase]: 1422/2390 cut-off events. [2024-06-20 15:28:13,904 INFO L125 PetriNetUnfolderBase]: For 58062/58062 co-relation queries the response was YES. [2024-06-20 15:28:13,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15385 conditions, 2390 events. 1422/2390 cut-off events. For 58062/58062 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13485 event pairs, 296 based on Foata normal form. 14/2394 useless extension candidates. Maximal degree in co-relation 15322. Up to 1836 conditions per place. [2024-06-20 15:28:13,932 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 59 changer transitions 0/225 dead transitions. [2024-06-20 15:28:13,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 225 transitions, 2965 flow [2024-06-20 15:28:13,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-20 15:28:13,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6700680272108843 [2024-06-20 15:28:13,935 INFO L175 Difference]: Start difference. First operand has 133 places, 190 transitions, 2275 flow. Second operand 7 states and 197 transitions. [2024-06-20 15:28:13,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 225 transitions, 2965 flow [2024-06-20 15:28:14,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 225 transitions, 2759 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:14,021 INFO L231 Difference]: Finished difference. Result has 135 places, 193 transitions, 2270 flow [2024-06-20 15:28:14,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2270, PETRI_PLACES=135, PETRI_TRANSITIONS=193} [2024-06-20 15:28:14,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-20 15:28:14,030 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 193 transitions, 2270 flow [2024-06-20 15:28:14,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:14,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:14,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:14,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:28:14,031 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)] === [2024-06-20 15:28:14,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:14,031 INFO L85 PathProgramCache]: Analyzing trace with hash -682735781, now seen corresponding path program 4 times [2024-06-20 15:28:14,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:14,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915312721] [2024-06-20 15:28:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:14,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:14,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:14,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915312721] [2024-06-20 15:28:14,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915312721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:14,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:14,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:14,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34174097] [2024-06-20 15:28:14,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:14,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:14,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:14,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:14,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:14,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 193 transitions, 2270 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:14,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:14,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:14,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:14,524 INFO L124 PetriNetUnfolderBase]: 1460/2461 cut-off events. [2024-06-20 15:28:14,524 INFO L125 PetriNetUnfolderBase]: For 60412/60412 co-relation queries the response was YES. [2024-06-20 15:28:14,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15730 conditions, 2461 events. 1460/2461 cut-off events. For 60412/60412 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13990 event pairs, 312 based on Foata normal form. 14/2469 useless extension candidates. Maximal degree in co-relation 15666. Up to 1866 conditions per place. [2024-06-20 15:28:14,546 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 61 changer transitions 0/225 dead transitions. [2024-06-20 15:28:14,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 225 transitions, 2966 flow [2024-06-20 15:28:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:14,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-20 15:28:14,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-20 15:28:14,547 INFO L175 Difference]: Start difference. First operand has 135 places, 193 transitions, 2270 flow. Second operand 7 states and 194 transitions. [2024-06-20 15:28:14,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 225 transitions, 2966 flow [2024-06-20 15:28:14,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 225 transitions, 2807 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:14,619 INFO L231 Difference]: Finished difference. Result has 137 places, 196 transitions, 2326 flow [2024-06-20 15:28:14,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2326, PETRI_PLACES=137, PETRI_TRANSITIONS=196} [2024-06-20 15:28:14,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-20 15:28:14,620 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 196 transitions, 2326 flow [2024-06-20 15:28:14,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:14,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:14,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:14,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:28:14,620 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:14,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:14,621 INFO L85 PathProgramCache]: Analyzing trace with hash -565996295, now seen corresponding path program 4 times [2024-06-20 15:28:14,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:14,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689306974] [2024-06-20 15:28:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:14,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:14,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:14,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689306974] [2024-06-20 15:28:14,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689306974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:14,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:14,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:14,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077481042] [2024-06-20 15:28:14,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:14,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:14,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:14,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:14,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:14,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 196 transitions, 2326 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:14,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:14,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:14,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:15,014 INFO L124 PetriNetUnfolderBase]: 1539/2597 cut-off events. [2024-06-20 15:28:15,014 INFO L125 PetriNetUnfolderBase]: For 64940/64940 co-relation queries the response was YES. [2024-06-20 15:28:15,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16838 conditions, 2597 events. 1539/2597 cut-off events. For 64940/64940 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14979 event pairs, 320 based on Foata normal form. 4/2595 useless extension candidates. Maximal degree in co-relation 16773. Up to 1742 conditions per place. [2024-06-20 15:28:15,034 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 128 selfloop transitions, 106 changer transitions 0/243 dead transitions. [2024-06-20 15:28:15,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 243 transitions, 3460 flow [2024-06-20 15:28:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-20 15:28:15,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2024-06-20 15:28:15,036 INFO L175 Difference]: Start difference. First operand has 137 places, 196 transitions, 2326 flow. Second operand 7 states and 201 transitions. [2024-06-20 15:28:15,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 243 transitions, 3460 flow [2024-06-20 15:28:15,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 243 transitions, 3287 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:15,117 INFO L231 Difference]: Finished difference. Result has 139 places, 214 transitions, 2679 flow [2024-06-20 15:28:15,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2679, PETRI_PLACES=139, PETRI_TRANSITIONS=214} [2024-06-20 15:28:15,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-20 15:28:15,118 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 214 transitions, 2679 flow [2024-06-20 15:28:15,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:15,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:15,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:15,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:28:15,119 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:15,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1646958669, now seen corresponding path program 5 times [2024-06-20 15:28:15,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:15,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225345207] [2024-06-20 15:28:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:15,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:15,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:15,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225345207] [2024-06-20 15:28:15,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225345207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:15,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:15,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:15,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926936107] [2024-06-20 15:28:15,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:15,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:15,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:15,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:15,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:15,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:15,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 214 transitions, 2679 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:15,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:15,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:15,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:15,633 INFO L124 PetriNetUnfolderBase]: 1530/2585 cut-off events. [2024-06-20 15:28:15,633 INFO L125 PetriNetUnfolderBase]: For 66640/66640 co-relation queries the response was YES. [2024-06-20 15:28:15,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16850 conditions, 2585 events. 1530/2585 cut-off events. For 66640/66640 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14891 event pairs, 320 based on Foata normal form. 4/2583 useless extension candidates. Maximal degree in co-relation 16784. Up to 1736 conditions per place. [2024-06-20 15:28:15,652 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 125 selfloop transitions, 107 changer transitions 0/241 dead transitions. [2024-06-20 15:28:15,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 241 transitions, 3417 flow [2024-06-20 15:28:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-20 15:28:15,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-06-20 15:28:15,653 INFO L175 Difference]: Start difference. First operand has 139 places, 214 transitions, 2679 flow. Second operand 7 states and 198 transitions. [2024-06-20 15:28:15,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 241 transitions, 3417 flow [2024-06-20 15:28:15,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 241 transitions, 3255 flow, removed 75 selfloop flow, removed 1 redundant places. [2024-06-20 15:28:15,746 INFO L231 Difference]: Finished difference. Result has 145 places, 214 transitions, 2741 flow [2024-06-20 15:28:15,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2741, PETRI_PLACES=145, PETRI_TRANSITIONS=214} [2024-06-20 15:28:15,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-20 15:28:15,747 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 214 transitions, 2741 flow [2024-06-20 15:28:15,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:15,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:15,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:15,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:28:15,748 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:15,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1772588459, now seen corresponding path program 6 times [2024-06-20 15:28:15,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:15,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684479403] [2024-06-20 15:28:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:15,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:15,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:15,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684479403] [2024-06-20 15:28:15,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684479403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:15,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:15,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:15,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945723790] [2024-06-20 15:28:15,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:15,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:15,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:15,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:15,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:15,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:15,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 214 transitions, 2741 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:15,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:15,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:15,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:16,179 INFO L124 PetriNetUnfolderBase]: 1521/2576 cut-off events. [2024-06-20 15:28:16,179 INFO L125 PetriNetUnfolderBase]: For 68643/68643 co-relation queries the response was YES. [2024-06-20 15:28:16,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17000 conditions, 2576 events. 1521/2576 cut-off events. For 68643/68643 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14874 event pairs, 318 based on Foata normal form. 4/2574 useless extension candidates. Maximal degree in co-relation 16932. Up to 1730 conditions per place. [2024-06-20 15:28:16,200 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 125 selfloop transitions, 106 changer transitions 0/240 dead transitions. [2024-06-20 15:28:16,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 240 transitions, 3435 flow [2024-06-20 15:28:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-20 15:28:16,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 15:28:16,202 INFO L175 Difference]: Start difference. First operand has 145 places, 214 transitions, 2741 flow. Second operand 7 states and 196 transitions. [2024-06-20 15:28:16,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 240 transitions, 3435 flow [2024-06-20 15:28:16,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 240 transitions, 3138 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:16,299 INFO L231 Difference]: Finished difference. Result has 146 places, 214 transitions, 2666 flow [2024-06-20 15:28:16,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2666, PETRI_PLACES=146, PETRI_TRANSITIONS=214} [2024-06-20 15:28:16,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-20 15:28:16,300 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 214 transitions, 2666 flow [2024-06-20 15:28:16,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:16,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:16,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:16,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:28:16,301 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:16,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:16,301 INFO L85 PathProgramCache]: Analyzing trace with hash -565987367, now seen corresponding path program 2 times [2024-06-20 15:28:16,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:16,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778715355] [2024-06-20 15:28:16,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:16,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:16,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778715355] [2024-06-20 15:28:16,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778715355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:16,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:16,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:16,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120810262] [2024-06-20 15:28:16,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:16,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:16,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:16,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:16,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:16,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:16,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 214 transitions, 2666 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:16,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:16,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:16,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:16,792 INFO L124 PetriNetUnfolderBase]: 1584/2678 cut-off events. [2024-06-20 15:28:16,793 INFO L125 PetriNetUnfolderBase]: For 77392/77392 co-relation queries the response was YES. [2024-06-20 15:28:16,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17416 conditions, 2678 events. 1584/2678 cut-off events. For 77392/77392 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15465 event pairs, 314 based on Foata normal form. 14/2688 useless extension candidates. Maximal degree in co-relation 17348. Up to 2074 conditions per place. [2024-06-20 15:28:16,816 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 57 changer transitions 0/246 dead transitions. [2024-06-20 15:28:16,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 246 transitions, 3418 flow [2024-06-20 15:28:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-20 15:28:16,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-20 15:28:16,817 INFO L175 Difference]: Start difference. First operand has 146 places, 214 transitions, 2666 flow. Second operand 7 states and 195 transitions. [2024-06-20 15:28:16,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 246 transitions, 3418 flow [2024-06-20 15:28:16,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 246 transitions, 3206 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:16,931 INFO L231 Difference]: Finished difference. Result has 147 places, 217 transitions, 2659 flow [2024-06-20 15:28:16,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2659, PETRI_PLACES=147, PETRI_TRANSITIONS=217} [2024-06-20 15:28:16,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-20 15:28:16,932 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 217 transitions, 2659 flow [2024-06-20 15:28:16,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:16,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:16,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:16,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:28:16,933 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:16,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:16,933 INFO L85 PathProgramCache]: Analyzing trace with hash -919306279, now seen corresponding path program 3 times [2024-06-20 15:28:16,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:16,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987787397] [2024-06-20 15:28:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:16,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:17,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:17,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987787397] [2024-06-20 15:28:17,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987787397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:17,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:17,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:17,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754640252] [2024-06-20 15:28:17,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:17,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:17,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:17,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:17,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:17,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 217 transitions, 2659 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:17,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:17,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:17,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:17,414 INFO L124 PetriNetUnfolderBase]: 1647/2790 cut-off events. [2024-06-20 15:28:17,415 INFO L125 PetriNetUnfolderBase]: For 82484/82484 co-relation queries the response was YES. [2024-06-20 15:28:17,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18061 conditions, 2790 events. 1647/2790 cut-off events. For 82484/82484 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16315 event pairs, 325 based on Foata normal form. 14/2800 useless extension candidates. Maximal degree in co-relation 17992. Up to 2175 conditions per place. [2024-06-20 15:28:17,437 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 56 changer transitions 0/250 dead transitions. [2024-06-20 15:28:17,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 250 transitions, 3491 flow [2024-06-20 15:28:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-20 15:28:17,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-20 15:28:17,438 INFO L175 Difference]: Start difference. First operand has 147 places, 217 transitions, 2659 flow. Second operand 7 states and 195 transitions. [2024-06-20 15:28:17,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 250 transitions, 3491 flow [2024-06-20 15:28:17,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 250 transitions, 3328 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:17,530 INFO L231 Difference]: Finished difference. Result has 149 places, 220 transitions, 2705 flow [2024-06-20 15:28:17,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2705, PETRI_PLACES=149, PETRI_TRANSITIONS=220} [2024-06-20 15:28:17,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-20 15:28:17,531 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 220 transitions, 2705 flow [2024-06-20 15:28:17,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:17,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:17,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:17,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:28:17,531 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:17,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash -908830759, now seen corresponding path program 4 times [2024-06-20 15:28:17,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:17,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407307188] [2024-06-20 15:28:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:17,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:17,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:17,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407307188] [2024-06-20 15:28:17,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407307188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:17,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:17,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:17,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484408784] [2024-06-20 15:28:17,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:17,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:17,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:17,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:17,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:17,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 220 transitions, 2705 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:17,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:17,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:17,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:18,008 INFO L124 PetriNetUnfolderBase]: 1777/3028 cut-off events. [2024-06-20 15:28:18,008 INFO L125 PetriNetUnfolderBase]: For 94250/94250 co-relation queries the response was YES. [2024-06-20 15:28:18,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19590 conditions, 3028 events. 1777/3028 cut-off events. For 94250/94250 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18172 event pairs, 320 based on Foata normal form. 14/3038 useless extension candidates. Maximal degree in co-relation 19520. Up to 2012 conditions per place. [2024-06-20 15:28:18,032 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 188 selfloop transitions, 63 changer transitions 0/260 dead transitions. [2024-06-20 15:28:18,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 260 transitions, 3681 flow [2024-06-20 15:28:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:18,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-20 15:28:18,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2024-06-20 15:28:18,033 INFO L175 Difference]: Start difference. First operand has 149 places, 220 transitions, 2705 flow. Second operand 7 states and 199 transitions. [2024-06-20 15:28:18,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 260 transitions, 3681 flow [2024-06-20 15:28:18,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 260 transitions, 3514 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:18,137 INFO L231 Difference]: Finished difference. Result has 152 places, 225 transitions, 2813 flow [2024-06-20 15:28:18,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2813, PETRI_PLACES=152, PETRI_TRANSITIONS=225} [2024-06-20 15:28:18,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-20 15:28:18,138 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 225 transitions, 2813 flow [2024-06-20 15:28:18,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:18,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:18,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:18,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:28:18,139 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)] === [2024-06-20 15:28:18,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash 239261120, now seen corresponding path program 1 times [2024-06-20 15:28:18,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:18,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101796488] [2024-06-20 15:28:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:18,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:18,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:18,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101796488] [2024-06-20 15:28:18,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101796488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:18,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:18,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:28:18,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397496831] [2024-06-20 15:28:18,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:18,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:28:18,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:18,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:28:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:28:18,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:18,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 225 transitions, 2813 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:18,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:18,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:18,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:18,538 INFO L124 PetriNetUnfolderBase]: 1787/3047 cut-off events. [2024-06-20 15:28:18,539 INFO L125 PetriNetUnfolderBase]: For 93195/93195 co-relation queries the response was YES. [2024-06-20 15:28:18,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20247 conditions, 3047 events. 1787/3047 cut-off events. For 93195/93195 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18332 event pairs, 377 based on Foata normal form. 2/3045 useless extension candidates. Maximal degree in co-relation 20175. Up to 2574 conditions per place. [2024-06-20 15:28:18,565 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 196 selfloop transitions, 37 changer transitions 0/242 dead transitions. [2024-06-20 15:28:18,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 242 transitions, 3447 flow [2024-06-20 15:28:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:28:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:28:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-20 15:28:18,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-20 15:28:18,566 INFO L175 Difference]: Start difference. First operand has 152 places, 225 transitions, 2813 flow. Second operand 5 states and 134 transitions. [2024-06-20 15:28:18,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 242 transitions, 3447 flow [2024-06-20 15:28:18,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 242 transitions, 3306 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:18,694 INFO L231 Difference]: Finished difference. Result has 154 places, 229 transitions, 2829 flow [2024-06-20 15:28:18,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2829, PETRI_PLACES=154, PETRI_TRANSITIONS=229} [2024-06-20 15:28:18,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-20 15:28:18,695 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 229 transitions, 2829 flow [2024-06-20 15:28:18,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:18,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:18,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:18,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:28:18,695 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)] === [2024-06-20 15:28:18,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:18,696 INFO L85 PathProgramCache]: Analyzing trace with hash 239528030, now seen corresponding path program 2 times [2024-06-20 15:28:18,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:18,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930759433] [2024-06-20 15:28:18,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:18,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:18,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:18,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930759433] [2024-06-20 15:28:18,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930759433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:18,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:18,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:28:18,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421394042] [2024-06-20 15:28:18,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:18,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:28:18,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:18,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:28:18,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:28:18,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:18,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 229 transitions, 2829 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:18,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:18,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:18,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:19,085 INFO L124 PetriNetUnfolderBase]: 1751/2976 cut-off events. [2024-06-20 15:28:19,086 INFO L125 PetriNetUnfolderBase]: For 94048/94048 co-relation queries the response was YES. [2024-06-20 15:28:19,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19786 conditions, 2976 events. 1751/2976 cut-off events. For 94048/94048 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17823 event pairs, 386 based on Foata normal form. 2/2969 useless extension candidates. Maximal degree in co-relation 19712. Up to 2518 conditions per place. [2024-06-20 15:28:19,109 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 195 selfloop transitions, 34 changer transitions 0/238 dead transitions. [2024-06-20 15:28:19,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 238 transitions, 3309 flow [2024-06-20 15:28:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:28:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:28:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 15:28:19,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-20 15:28:19,111 INFO L175 Difference]: Start difference. First operand has 154 places, 229 transitions, 2829 flow. Second operand 5 states and 129 transitions. [2024-06-20 15:28:19,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 238 transitions, 3309 flow [2024-06-20 15:28:19,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 238 transitions, 3257 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 15:28:19,232 INFO L231 Difference]: Finished difference. Result has 157 places, 229 transitions, 2852 flow [2024-06-20 15:28:19,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2852, PETRI_PLACES=157, PETRI_TRANSITIONS=229} [2024-06-20 15:28:19,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-20 15:28:19,234 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 229 transitions, 2852 flow [2024-06-20 15:28:19,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:19,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:19,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:19,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:28:19,235 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)] === [2024-06-20 15:28:19,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash 239537950, now seen corresponding path program 1 times [2024-06-20 15:28:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:19,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270649931] [2024-06-20 15:28:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:19,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:19,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:19,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270649931] [2024-06-20 15:28:19,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270649931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:19,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:19,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:19,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882731362] [2024-06-20 15:28:19,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:19,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:19,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:19,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:19,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:19,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:19,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 229 transitions, 2852 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-20 15:28:19,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:19,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:19,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:19,652 INFO L124 PetriNetUnfolderBase]: 1770/2999 cut-off events. [2024-06-20 15:28:19,652 INFO L125 PetriNetUnfolderBase]: For 101681/101681 co-relation queries the response was YES. [2024-06-20 15:28:19,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20052 conditions, 2999 events. 1770/2999 cut-off events. For 101681/101681 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17838 event pairs, 381 based on Foata normal form. 8/2998 useless extension candidates. Maximal degree in co-relation 19977. Up to 2523 conditions per place. [2024-06-20 15:28:19,676 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 194 selfloop transitions, 41 changer transitions 0/244 dead transitions. [2024-06-20 15:28:19,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 244 transitions, 3404 flow [2024-06-20 15:28:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:28:19,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:28:19,677 INFO L175 Difference]: Start difference. First operand has 157 places, 229 transitions, 2852 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:28:19,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 244 transitions, 3404 flow [2024-06-20 15:28:19,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 244 transitions, 3268 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:19,829 INFO L231 Difference]: Finished difference. Result has 157 places, 233 transitions, 2869 flow [2024-06-20 15:28:19,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2869, PETRI_PLACES=157, PETRI_TRANSITIONS=233} [2024-06-20 15:28:19,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-20 15:28:19,829 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 233 transitions, 2869 flow [2024-06-20 15:28:19,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-20 15:28:19,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:19,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:19,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:28:19,830 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)] === [2024-06-20 15:28:19,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:19,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1876271683, now seen corresponding path program 1 times [2024-06-20 15:28:19,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:19,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392312103] [2024-06-20 15:28:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:19,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:19,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:19,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392312103] [2024-06-20 15:28:19,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392312103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:19,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:19,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:19,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768481377] [2024-06-20 15:28:19,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:19,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:19,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:19,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:19,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:19,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:19,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 233 transitions, 2869 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-20 15:28:19,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:19,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:19,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:20,277 INFO L124 PetriNetUnfolderBase]: 1757/2995 cut-off events. [2024-06-20 15:28:20,277 INFO L125 PetriNetUnfolderBase]: For 99917/99917 co-relation queries the response was YES. [2024-06-20 15:28:20,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20161 conditions, 2995 events. 1757/2995 cut-off events. For 99917/99917 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17819 event pairs, 350 based on Foata normal form. 2/2995 useless extension candidates. Maximal degree in co-relation 20086. Up to 2597 conditions per place. [2024-06-20 15:28:20,301 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 18 changer transitions 0/259 dead transitions. [2024-06-20 15:28:20,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 259 transitions, 3435 flow [2024-06-20 15:28:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:28:20,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-20 15:28:20,302 INFO L175 Difference]: Start difference. First operand has 157 places, 233 transitions, 2869 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:28:20,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 259 transitions, 3435 flow [2024-06-20 15:28:20,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 259 transitions, 3302 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:20,417 INFO L231 Difference]: Finished difference. Result has 160 places, 233 transitions, 2780 flow [2024-06-20 15:28:20,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2780, PETRI_PLACES=160, PETRI_TRANSITIONS=233} [2024-06-20 15:28:20,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-20 15:28:20,417 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 233 transitions, 2780 flow [2024-06-20 15:28:20,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-20 15:28:20,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:20,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:20,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:28:20,418 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)] === [2024-06-20 15:28:20,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:20,418 INFO L85 PathProgramCache]: Analyzing trace with hash -61543689, now seen corresponding path program 2 times [2024-06-20 15:28:20,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:20,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271129463] [2024-06-20 15:28:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:20,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:20,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:20,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271129463] [2024-06-20 15:28:20,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271129463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:20,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:20,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:20,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331841194] [2024-06-20 15:28:20,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:20,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:20,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:20,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:20,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:20,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 233 transitions, 2780 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-20 15:28:20,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:20,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:20,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:20,874 INFO L124 PetriNetUnfolderBase]: 1775/3019 cut-off events. [2024-06-20 15:28:20,875 INFO L125 PetriNetUnfolderBase]: For 104874/104874 co-relation queries the response was YES. [2024-06-20 15:28:20,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20226 conditions, 3019 events. 1775/3019 cut-off events. For 104874/104874 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17992 event pairs, 361 based on Foata normal form. 2/3011 useless extension candidates. Maximal degree in co-relation 20150. Up to 2407 conditions per place. [2024-06-20 15:28:20,907 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 72 changer transitions 0/259 dead transitions. [2024-06-20 15:28:20,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 259 transitions, 3644 flow [2024-06-20 15:28:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-20 15:28:20,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468253968253969 [2024-06-20 15:28:20,908 INFO L175 Difference]: Start difference. First operand has 160 places, 233 transitions, 2780 flow. Second operand 6 states and 163 transitions. [2024-06-20 15:28:20,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 259 transitions, 3644 flow [2024-06-20 15:28:21,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 259 transitions, 3608 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:21,045 INFO L231 Difference]: Finished difference. Result has 160 places, 240 transitions, 2999 flow [2024-06-20 15:28:21,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2999, PETRI_PLACES=160, PETRI_TRANSITIONS=240} [2024-06-20 15:28:21,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-20 15:28:21,045 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 240 transitions, 2999 flow [2024-06-20 15:28:21,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-20 15:28:21,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:21,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:21,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:28:21,046 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)] === [2024-06-20 15:28:21,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:21,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1179525671, now seen corresponding path program 3 times [2024-06-20 15:28:21,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:21,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879812694] [2024-06-20 15:28:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:21,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:21,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:21,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879812694] [2024-06-20 15:28:21,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879812694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:21,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:21,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:21,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971722872] [2024-06-20 15:28:21,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:21,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:21,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:21,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:21,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:21,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:21,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 240 transitions, 2999 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-20 15:28:21,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:21,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:21,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:21,514 INFO L124 PetriNetUnfolderBase]: 1763/2979 cut-off events. [2024-06-20 15:28:21,515 INFO L125 PetriNetUnfolderBase]: For 109935/109935 co-relation queries the response was YES. [2024-06-20 15:28:21,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20301 conditions, 2979 events. 1763/2979 cut-off events. For 109935/109935 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17756 event pairs, 397 based on Foata normal form. 4/2969 useless extension candidates. Maximal degree in co-relation 20224. Up to 2399 conditions per place. [2024-06-20 15:28:21,540 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 65 changer transitions 0/252 dead transitions. [2024-06-20 15:28:21,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 252 transitions, 3661 flow [2024-06-20 15:28:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:28:21,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-20 15:28:21,541 INFO L175 Difference]: Start difference. First operand has 160 places, 240 transitions, 2999 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:28:21,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 252 transitions, 3661 flow [2024-06-20 15:28:21,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 252 transitions, 3559 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 15:28:21,711 INFO L231 Difference]: Finished difference. Result has 164 places, 240 transitions, 3035 flow [2024-06-20 15:28:21,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2897, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3035, PETRI_PLACES=164, PETRI_TRANSITIONS=240} [2024-06-20 15:28:21,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-20 15:28:21,712 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 240 transitions, 3035 flow [2024-06-20 15:28:21,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-20 15:28:21,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:21,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:21,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:28:21,713 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)] === [2024-06-20 15:28:21,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:21,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1006188873, now seen corresponding path program 1 times [2024-06-20 15:28:21,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:21,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095891947] [2024-06-20 15:28:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:21,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:21,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:21,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095891947] [2024-06-20 15:28:21,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095891947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:21,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:21,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:21,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961996862] [2024-06-20 15:28:21,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:21,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:21,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:21,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:21,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 240 transitions, 3035 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-20 15:28:21,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:21,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:21,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:22,181 INFO L124 PetriNetUnfolderBase]: 1768/3013 cut-off events. [2024-06-20 15:28:22,182 INFO L125 PetriNetUnfolderBase]: For 111484/111484 co-relation queries the response was YES. [2024-06-20 15:28:22,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20520 conditions, 3013 events. 1768/3013 cut-off events. For 111484/111484 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17976 event pairs, 349 based on Foata normal form. 1/3012 useless extension candidates. Maximal degree in co-relation 20442. Up to 2624 conditions per place. [2024-06-20 15:28:22,209 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 231 selfloop transitions, 20 changer transitions 0/260 dead transitions. [2024-06-20 15:28:22,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 260 transitions, 3691 flow [2024-06-20 15:28:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:28:22,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-20 15:28:22,211 INFO L175 Difference]: Start difference. First operand has 164 places, 240 transitions, 3035 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:28:22,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 260 transitions, 3691 flow [2024-06-20 15:28:22,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 3417 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 15:28:22,410 INFO L231 Difference]: Finished difference. Result has 162 places, 243 transitions, 2843 flow [2024-06-20 15:28:22,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2843, PETRI_PLACES=162, PETRI_TRANSITIONS=243} [2024-06-20 15:28:22,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-20 15:28:22,411 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 243 transitions, 2843 flow [2024-06-20 15:28:22,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-20 15:28:22,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:22,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:22,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:28:22,412 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)] === [2024-06-20 15:28:22,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:22,412 INFO L85 PathProgramCache]: Analyzing trace with hash -994970397, now seen corresponding path program 2 times [2024-06-20 15:28:22,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:22,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900463052] [2024-06-20 15:28:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:22,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:22,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:22,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900463052] [2024-06-20 15:28:22,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900463052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:22,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:22,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:28:22,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662379983] [2024-06-20 15:28:22,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:22,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:28:22,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:28:22,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:28:22,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:22,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 243 transitions, 2843 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:22,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:22,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:22,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:22,804 INFO L124 PetriNetUnfolderBase]: 1765/3001 cut-off events. [2024-06-20 15:28:22,805 INFO L125 PetriNetUnfolderBase]: For 113627/113627 co-relation queries the response was YES. [2024-06-20 15:28:22,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20188 conditions, 3001 events. 1765/3001 cut-off events. For 113627/113627 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17855 event pairs, 356 based on Foata normal form. 1/2995 useless extension candidates. Maximal degree in co-relation 20112. Up to 2621 conditions per place. [2024-06-20 15:28:22,829 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 223 selfloop transitions, 20 changer transitions 0/252 dead transitions. [2024-06-20 15:28:22,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 252 transitions, 3351 flow [2024-06-20 15:28:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:28:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:28:22,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:28:22,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-20 15:28:22,830 INFO L175 Difference]: Start difference. First operand has 162 places, 243 transitions, 2843 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:28:22,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 252 transitions, 3351 flow [2024-06-20 15:28:22,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 252 transitions, 3301 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:22,991 INFO L231 Difference]: Finished difference. Result has 163 places, 243 transitions, 2839 flow [2024-06-20 15:28:22,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2839, PETRI_PLACES=163, PETRI_TRANSITIONS=243} [2024-06-20 15:28:22,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-20 15:28:22,992 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 243 transitions, 2839 flow [2024-06-20 15:28:22,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:22,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:22,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:22,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:28:22,992 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:22,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:22,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2097402408, now seen corresponding path program 1 times [2024-06-20 15:28:22,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:22,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962268967] [2024-06-20 15:28:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:22,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:23,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:23,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962268967] [2024-06-20 15:28:23,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962268967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:23,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:23,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:23,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068336231] [2024-06-20 15:28:23,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:23,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:23,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:23,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:23,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:23,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:23,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 243 transitions, 2839 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:23,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:23,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:23,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:23,604 INFO L124 PetriNetUnfolderBase]: 1965/3334 cut-off events. [2024-06-20 15:28:23,604 INFO L125 PetriNetUnfolderBase]: For 153693/153693 co-relation queries the response was YES. [2024-06-20 15:28:23,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23539 conditions, 3334 events. 1965/3334 cut-off events. For 153693/153693 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20347 event pairs, 312 based on Foata normal form. 18/3348 useless extension candidates. Maximal degree in co-relation 23462. Up to 2459 conditions per place. [2024-06-20 15:28:23,630 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 256 selfloop transitions, 30 changer transitions 0/295 dead transitions. [2024-06-20 15:28:23,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 295 transitions, 3927 flow [2024-06-20 15:28:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:28:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:28:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-20 15:28:23,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375661375661376 [2024-06-20 15:28:23,632 INFO L175 Difference]: Start difference. First operand has 163 places, 243 transitions, 2839 flow. Second operand 9 states and 241 transitions. [2024-06-20 15:28:23,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 295 transitions, 3927 flow [2024-06-20 15:28:23,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 295 transitions, 3871 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:23,776 INFO L231 Difference]: Finished difference. Result has 168 places, 246 transitions, 2966 flow [2024-06-20 15:28:23,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2966, PETRI_PLACES=168, PETRI_TRANSITIONS=246} [2024-06-20 15:28:23,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-20 15:28:23,776 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 246 transitions, 2966 flow [2024-06-20 15:28:23,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:23,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:23,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:23,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:28:23,777 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:23,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:23,777 INFO L85 PathProgramCache]: Analyzing trace with hash 648136152, now seen corresponding path program 2 times [2024-06-20 15:28:23,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:23,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090200146] [2024-06-20 15:28:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:23,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:23,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:23,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090200146] [2024-06-20 15:28:23,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090200146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:23,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:23,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:23,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877986582] [2024-06-20 15:28:23,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:23,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:23,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:23,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:23,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:23,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 246 transitions, 2966 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:23,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:23,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:23,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:24,382 INFO L124 PetriNetUnfolderBase]: 2072/3529 cut-off events. [2024-06-20 15:28:24,382 INFO L125 PetriNetUnfolderBase]: For 173596/173596 co-relation queries the response was YES. [2024-06-20 15:28:24,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25626 conditions, 3529 events. 2072/3529 cut-off events. For 173596/173596 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21760 event pairs, 424 based on Foata normal form. 18/3545 useless extension candidates. Maximal degree in co-relation 25549. Up to 2797 conditions per place. [2024-06-20 15:28:24,412 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 30 changer transitions 0/294 dead transitions. [2024-06-20 15:28:24,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 294 transitions, 4056 flow [2024-06-20 15:28:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:28:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:28:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-20 15:28:24,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-20 15:28:24,414 INFO L175 Difference]: Start difference. First operand has 168 places, 246 transitions, 2966 flow. Second operand 9 states and 237 transitions. [2024-06-20 15:28:24,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 294 transitions, 4056 flow [2024-06-20 15:28:24,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 294 transitions, 3947 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:24,594 INFO L231 Difference]: Finished difference. Result has 172 places, 250 transitions, 3096 flow [2024-06-20 15:28:24,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3096, PETRI_PLACES=172, PETRI_TRANSITIONS=250} [2024-06-20 15:28:24,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-20 15:28:24,595 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 250 transitions, 3096 flow [2024-06-20 15:28:24,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:24,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:24,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:24,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:28:24,598 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:24,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash 652897752, now seen corresponding path program 3 times [2024-06-20 15:28:24,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:24,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152381124] [2024-06-20 15:28:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:24,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:24,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:24,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152381124] [2024-06-20 15:28:24,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152381124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:24,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:24,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:24,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186664643] [2024-06-20 15:28:24,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:24,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:24,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:24,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:24,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:24,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:24,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 250 transitions, 3096 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:24,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:24,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:24,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:25,225 INFO L124 PetriNetUnfolderBase]: 2026/3459 cut-off events. [2024-06-20 15:28:25,225 INFO L125 PetriNetUnfolderBase]: For 166748/166748 co-relation queries the response was YES. [2024-06-20 15:28:25,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24001 conditions, 3459 events. 2026/3459 cut-off events. For 166748/166748 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21306 event pairs, 421 based on Foata normal form. 24/3481 useless extension candidates. Maximal degree in co-relation 23922. Up to 2898 conditions per place. [2024-06-20 15:28:25,258 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 26 changer transitions 0/289 dead transitions. [2024-06-20 15:28:25,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 289 transitions, 3852 flow [2024-06-20 15:28:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:28:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:28:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-20 15:28:25,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-20 15:28:25,259 INFO L175 Difference]: Start difference. First operand has 172 places, 250 transitions, 3096 flow. Second operand 9 states and 232 transitions. [2024-06-20 15:28:25,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 289 transitions, 3852 flow [2024-06-20 15:28:25,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 289 transitions, 3698 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:25,486 INFO L231 Difference]: Finished difference. Result has 176 places, 250 transitions, 3002 flow [2024-06-20 15:28:25,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3002, PETRI_PLACES=176, PETRI_TRANSITIONS=250} [2024-06-20 15:28:25,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-20 15:28:25,487 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 250 transitions, 3002 flow [2024-06-20 15:28:25,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:25,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:25,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:25,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:28:25,488 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:25,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash 39338618, now seen corresponding path program 4 times [2024-06-20 15:28:25,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:25,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171868293] [2024-06-20 15:28:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:25,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:25,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:25,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171868293] [2024-06-20 15:28:25,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171868293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:25,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:25,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:25,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821336626] [2024-06-20 15:28:25,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:25,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:25,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:25,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:25,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:25,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:25,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 250 transitions, 3002 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:25,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:25,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:25,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:26,157 INFO L124 PetriNetUnfolderBase]: 2188/3721 cut-off events. [2024-06-20 15:28:26,157 INFO L125 PetriNetUnfolderBase]: For 201393/201393 co-relation queries the response was YES. [2024-06-20 15:28:26,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24929 conditions, 3721 events. 2188/3721 cut-off events. For 201393/201393 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23156 event pairs, 472 based on Foata normal form. 50/3756 useless extension candidates. Maximal degree in co-relation 24848. Up to 2553 conditions per place. [2024-06-20 15:28:26,188 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 155 selfloop transitions, 124 changer transitions 3/291 dead transitions. [2024-06-20 15:28:26,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 291 transitions, 4028 flow [2024-06-20 15:28:26,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-20 15:28:26,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-20 15:28:26,189 INFO L175 Difference]: Start difference. First operand has 176 places, 250 transitions, 3002 flow. Second operand 8 states and 229 transitions. [2024-06-20 15:28:26,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 291 transitions, 4028 flow [2024-06-20 15:28:26,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 291 transitions, 3968 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:28:26,422 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 3279 flow [2024-06-20 15:28:26,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3279, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-06-20 15:28:26,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-20 15:28:26,422 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 3279 flow [2024-06-20 15:28:26,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:26,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:26,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:26,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:28:26,423 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:26,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:26,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1727387422, now seen corresponding path program 5 times [2024-06-20 15:28:26,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:26,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046924874] [2024-06-20 15:28:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:26,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:26,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:26,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046924874] [2024-06-20 15:28:26,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046924874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:26,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:26,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:26,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338976684] [2024-06-20 15:28:26,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:26,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:26,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:26,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:26,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:26,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 3279 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:26,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:26,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:26,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:27,160 INFO L124 PetriNetUnfolderBase]: 2566/4373 cut-off events. [2024-06-20 15:28:27,160 INFO L125 PetriNetUnfolderBase]: For 264593/264593 co-relation queries the response was YES. [2024-06-20 15:28:27,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31152 conditions, 4373 events. 2566/4373 cut-off events. For 264593/264593 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27960 event pairs, 585 based on Foata normal form. 42/4400 useless extension candidates. Maximal degree in co-relation 31070. Up to 2519 conditions per place. [2024-06-20 15:28:27,200 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 160 selfloop transitions, 129 changer transitions 4/302 dead transitions. [2024-06-20 15:28:27,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 302 transitions, 4619 flow [2024-06-20 15:28:27,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:27,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-20 15:28:27,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6994047619047619 [2024-06-20 15:28:27,202 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 3279 flow. Second operand 8 states and 235 transitions. [2024-06-20 15:28:27,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 302 transitions, 4619 flow [2024-06-20 15:28:27,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 302 transitions, 4307 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:27,616 INFO L231 Difference]: Finished difference. Result has 178 places, 254 transitions, 3405 flow [2024-06-20 15:28:27,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3405, PETRI_PLACES=178, PETRI_TRANSITIONS=254} [2024-06-20 15:28:27,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-20 15:28:27,618 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 254 transitions, 3405 flow [2024-06-20 15:28:27,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:27,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:27,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:27,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:28:27,619 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:27,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2129759308, now seen corresponding path program 6 times [2024-06-20 15:28:27,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:27,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144805450] [2024-06-20 15:28:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:27,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:27,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:27,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144805450] [2024-06-20 15:28:27,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144805450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:27,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:27,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:27,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163680512] [2024-06-20 15:28:27,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:27,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:27,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:27,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:27,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:27,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 254 transitions, 3405 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:27,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:27,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:27,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:28,306 INFO L124 PetriNetUnfolderBase]: 2439/4170 cut-off events. [2024-06-20 15:28:28,306 INFO L125 PetriNetUnfolderBase]: For 229539/229539 co-relation queries the response was YES. [2024-06-20 15:28:28,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27855 conditions, 4170 events. 2439/4170 cut-off events. For 229539/229539 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26593 event pairs, 595 based on Foata normal form. 50/4205 useless extension candidates. Maximal degree in co-relation 27772. Up to 2982 conditions per place. [2024-06-20 15:28:28,342 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 158 selfloop transitions, 124 changer transitions 3/294 dead transitions. [2024-06-20 15:28:28,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 294 transitions, 4455 flow [2024-06-20 15:28:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-20 15:28:28,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-20 15:28:28,344 INFO L175 Difference]: Start difference. First operand has 178 places, 254 transitions, 3405 flow. Second operand 8 states and 229 transitions. [2024-06-20 15:28:28,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 294 transitions, 4455 flow [2024-06-20 15:28:28,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 294 transitions, 4071 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:28,637 INFO L231 Difference]: Finished difference. Result has 181 places, 253 transitions, 3269 flow [2024-06-20 15:28:28,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3269, PETRI_PLACES=181, PETRI_TRANSITIONS=253} [2024-06-20 15:28:28,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-20 15:28:28,638 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 253 transitions, 3269 flow [2024-06-20 15:28:28,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:28,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:28,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:28,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:28:28,638 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:28,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:28,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1975539020, now seen corresponding path program 1 times [2024-06-20 15:28:28,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:28,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055347848] [2024-06-20 15:28:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:28,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:28,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:28,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055347848] [2024-06-20 15:28:28,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055347848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:28,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:28,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:28,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297473758] [2024-06-20 15:28:28,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:28,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:28,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:28,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:28,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:28,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:28,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 253 transitions, 3269 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:28,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:28,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:28,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:29,532 INFO L124 PetriNetUnfolderBase]: 2731/4667 cut-off events. [2024-06-20 15:28:29,532 INFO L125 PetriNetUnfolderBase]: For 265050/265050 co-relation queries the response was YES. [2024-06-20 15:28:29,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31122 conditions, 4667 events. 2731/4667 cut-off events. For 265050/265050 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30395 event pairs, 627 based on Foata normal form. 42/4691 useless extension candidates. Maximal degree in co-relation 31038. Up to 2561 conditions per place. [2024-06-20 15:28:29,581 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 158 selfloop transitions, 132 changer transitions 4/303 dead transitions. [2024-06-20 15:28:29,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 303 transitions, 4605 flow [2024-06-20 15:28:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-20 15:28:29,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-06-20 15:28:29,583 INFO L175 Difference]: Start difference. First operand has 181 places, 253 transitions, 3269 flow. Second operand 8 states and 234 transitions. [2024-06-20 15:28:29,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 303 transitions, 4605 flow [2024-06-20 15:28:29,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 303 transitions, 4299 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-20 15:28:29,980 INFO L231 Difference]: Finished difference. Result has 182 places, 255 transitions, 3358 flow [2024-06-20 15:28:29,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3358, PETRI_PLACES=182, PETRI_TRANSITIONS=255} [2024-06-20 15:28:29,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-20 15:28:29,980 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 255 transitions, 3358 flow [2024-06-20 15:28:29,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:29,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:29,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:29,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:28:29,981 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)] === [2024-06-20 15:28:29,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1570618147, now seen corresponding path program 1 times [2024-06-20 15:28:29,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:29,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935963144] [2024-06-20 15:28:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:29,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:30,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935963144] [2024-06-20 15:28:30,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935963144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:30,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:30,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:30,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436653145] [2024-06-20 15:28:30,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:30,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:30,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:30,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:30,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:30,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:30,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 255 transitions, 3358 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:30,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:30,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:30,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:30,718 INFO L124 PetriNetUnfolderBase]: 2719/4646 cut-off events. [2024-06-20 15:28:30,718 INFO L125 PetriNetUnfolderBase]: For 230863/230863 co-relation queries the response was YES. [2024-06-20 15:28:30,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30809 conditions, 4646 events. 2719/4646 cut-off events. For 230863/230863 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30288 event pairs, 748 based on Foata normal form. 2/4642 useless extension candidates. Maximal degree in co-relation 30724. Up to 4084 conditions per place. [2024-06-20 15:28:30,752 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 55 changer transitions 0/276 dead transitions. [2024-06-20 15:28:30,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 276 transitions, 4119 flow [2024-06-20 15:28:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:28:30,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-20 15:28:30,753 INFO L175 Difference]: Start difference. First operand has 182 places, 255 transitions, 3358 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:28:30,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 276 transitions, 4119 flow [2024-06-20 15:28:31,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 276 transitions, 3859 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:31,065 INFO L231 Difference]: Finished difference. Result has 185 places, 262 transitions, 3367 flow [2024-06-20 15:28:31,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3367, PETRI_PLACES=185, PETRI_TRANSITIONS=262} [2024-06-20 15:28:31,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-20 15:28:31,066 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 262 transitions, 3367 flow [2024-06-20 15:28:31,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:31,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:31,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:31,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:28:31,066 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)] === [2024-06-20 15:28:31,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash -865336095, now seen corresponding path program 2 times [2024-06-20 15:28:31,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:31,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545472111] [2024-06-20 15:28:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:31,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:31,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:31,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545472111] [2024-06-20 15:28:31,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545472111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:31,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:31,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:31,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105997090] [2024-06-20 15:28:31,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:31,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:31,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:31,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:31,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:31,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:31,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 262 transitions, 3367 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:31,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:31,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:31,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:31,737 INFO L124 PetriNetUnfolderBase]: 2737/4654 cut-off events. [2024-06-20 15:28:31,738 INFO L125 PetriNetUnfolderBase]: For 233643/233643 co-relation queries the response was YES. [2024-06-20 15:28:31,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30909 conditions, 4654 events. 2737/4654 cut-off events. For 233643/233643 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30240 event pairs, 788 based on Foata normal form. 2/4642 useless extension candidates. Maximal degree in co-relation 30821. Up to 4004 conditions per place. [2024-06-20 15:28:31,783 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 195 selfloop transitions, 78 changer transitions 0/282 dead transitions. [2024-06-20 15:28:31,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 282 transitions, 4342 flow [2024-06-20 15:28:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:28:31,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-20 15:28:31,784 INFO L175 Difference]: Start difference. First operand has 185 places, 262 transitions, 3367 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:28:31,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 282 transitions, 4342 flow [2024-06-20 15:28:32,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 282 transitions, 4244 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:32,232 INFO L231 Difference]: Finished difference. Result has 187 places, 269 transitions, 3550 flow [2024-06-20 15:28:32,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3275, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3550, PETRI_PLACES=187, PETRI_TRANSITIONS=269} [2024-06-20 15:28:32,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-20 15:28:32,233 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 269 transitions, 3550 flow [2024-06-20 15:28:32,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:32,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:32,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:32,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:28:32,234 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)] === [2024-06-20 15:28:32,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:32,234 INFO L85 PathProgramCache]: Analyzing trace with hash -864920385, now seen corresponding path program 3 times [2024-06-20 15:28:32,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:32,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66836202] [2024-06-20 15:28:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:32,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:32,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:32,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66836202] [2024-06-20 15:28:32,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66836202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:32,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:32,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:32,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82910854] [2024-06-20 15:28:32,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:32,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:32,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:32,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:32,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:32,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:32,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 269 transitions, 3550 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:32,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:32,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:32,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:32,876 INFO L124 PetriNetUnfolderBase]: 2731/4647 cut-off events. [2024-06-20 15:28:32,877 INFO L125 PetriNetUnfolderBase]: For 232301/232301 co-relation queries the response was YES. [2024-06-20 15:28:32,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30852 conditions, 4647 events. 2731/4647 cut-off events. For 232301/232301 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30188 event pairs, 787 based on Foata normal form. 2/4635 useless extension candidates. Maximal degree in co-relation 30764. Up to 3999 conditions per place. [2024-06-20 15:28:32,920 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 82 changer transitions 0/282 dead transitions. [2024-06-20 15:28:32,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 282 transitions, 4414 flow [2024-06-20 15:28:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:32,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 15:28:32,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-20 15:28:32,921 INFO L175 Difference]: Start difference. First operand has 187 places, 269 transitions, 3550 flow. Second operand 6 states and 158 transitions. [2024-06-20 15:28:32,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 282 transitions, 4414 flow [2024-06-20 15:28:33,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 282 transitions, 4256 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-20 15:28:33,326 INFO L231 Difference]: Finished difference. Result has 191 places, 269 transitions, 3563 flow [2024-06-20 15:28:33,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3563, PETRI_PLACES=191, PETRI_TRANSITIONS=269} [2024-06-20 15:28:33,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 15:28:33,327 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 269 transitions, 3563 flow [2024-06-20 15:28:33,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:33,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:33,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:33,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:28:33,328 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:33,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1115459146, now seen corresponding path program 7 times [2024-06-20 15:28:33,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:33,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902457105] [2024-06-20 15:28:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:33,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:33,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:33,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902457105] [2024-06-20 15:28:33,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902457105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:33,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:33,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:33,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316865573] [2024-06-20 15:28:33,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:33,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:33,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:33,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:33,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:33,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:33,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 269 transitions, 3563 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:33,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:33,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:33,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:34,100 INFO L124 PetriNetUnfolderBase]: 2893/4948 cut-off events. [2024-06-20 15:28:34,100 INFO L125 PetriNetUnfolderBase]: For 301331/301331 co-relation queries the response was YES. [2024-06-20 15:28:34,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32560 conditions, 4948 events. 2893/4948 cut-off events. For 301331/301331 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32664 event pairs, 831 based on Foata normal form. 50/4992 useless extension candidates. Maximal degree in co-relation 32471. Up to 3710 conditions per place. [2024-06-20 15:28:34,145 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 175 selfloop transitions, 119 changer transitions 3/306 dead transitions. [2024-06-20 15:28:34,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 306 transitions, 4551 flow [2024-06-20 15:28:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:34,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-20 15:28:34,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6696428571428571 [2024-06-20 15:28:34,147 INFO L175 Difference]: Start difference. First operand has 191 places, 269 transitions, 3563 flow. Second operand 8 states and 225 transitions. [2024-06-20 15:28:34,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 306 transitions, 4551 flow [2024-06-20 15:28:34,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 306 transitions, 4348 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:34,601 INFO L231 Difference]: Finished difference. Result has 194 places, 270 transitions, 3695 flow [2024-06-20 15:28:34,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3695, PETRI_PLACES=194, PETRI_TRANSITIONS=270} [2024-06-20 15:28:34,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-20 15:28:34,601 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 270 transitions, 3695 flow [2024-06-20 15:28:34,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:34,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:34,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:34,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:28:34,602 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:34,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:34,602 INFO L85 PathProgramCache]: Analyzing trace with hash -572863016, now seen corresponding path program 8 times [2024-06-20 15:28:34,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:34,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995158951] [2024-06-20 15:28:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:34,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:34,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:34,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995158951] [2024-06-20 15:28:34,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995158951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:34,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:34,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:34,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880805957] [2024-06-20 15:28:34,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:34,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:34,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:34,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:34,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:34,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:34,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 270 transitions, 3695 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:34,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:34,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:34,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:35,410 INFO L124 PetriNetUnfolderBase]: 3045/5214 cut-off events. [2024-06-20 15:28:35,410 INFO L125 PetriNetUnfolderBase]: For 323828/323828 co-relation queries the response was YES. [2024-06-20 15:28:35,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34550 conditions, 5214 events. 3045/5214 cut-off events. For 323828/323828 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34734 event pairs, 886 based on Foata normal form. 50/5258 useless extension candidates. Maximal degree in co-relation 34460. Up to 3966 conditions per place. [2024-06-20 15:28:35,460 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 119 changer transitions 3/307 dead transitions. [2024-06-20 15:28:35,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 307 transitions, 4693 flow [2024-06-20 15:28:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-20 15:28:35,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 15:28:35,462 INFO L175 Difference]: Start difference. First operand has 194 places, 270 transitions, 3695 flow. Second operand 8 states and 224 transitions. [2024-06-20 15:28:35,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 307 transitions, 4693 flow [2024-06-20 15:28:35,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 307 transitions, 4381 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:35,953 INFO L231 Difference]: Finished difference. Result has 196 places, 271 transitions, 3722 flow [2024-06-20 15:28:35,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3722, PETRI_PLACES=196, PETRI_TRANSITIONS=271} [2024-06-20 15:28:35,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-20 15:28:35,954 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 271 transitions, 3722 flow [2024-06-20 15:28:35,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:35,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:35,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:35,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:28:35,955 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:35,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:35,955 INFO L85 PathProgramCache]: Analyzing trace with hash 771486218, now seen corresponding path program 9 times [2024-06-20 15:28:35,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:35,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12377076] [2024-06-20 15:28:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:35,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:36,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:36,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12377076] [2024-06-20 15:28:36,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12377076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:36,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:36,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:36,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471817458] [2024-06-20 15:28:36,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:36,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:36,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:36,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:36,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:36,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:36,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 271 transitions, 3722 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:36,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:36,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:36,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:36,847 INFO L124 PetriNetUnfolderBase]: 3398/5817 cut-off events. [2024-06-20 15:28:36,847 INFO L125 PetriNetUnfolderBase]: For 391484/391484 co-relation queries the response was YES. [2024-06-20 15:28:36,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39756 conditions, 5817 events. 3398/5817 cut-off events. For 391484/391484 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 39515 event pairs, 971 based on Foata normal form. 42/5853 useless extension candidates. Maximal degree in co-relation 39665. Up to 3646 conditions per place. [2024-06-20 15:28:36,901 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 179 selfloop transitions, 126 changer transitions 4/318 dead transitions. [2024-06-20 15:28:36,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 318 transitions, 5064 flow [2024-06-20 15:28:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-20 15:28:36,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2024-06-20 15:28:36,902 INFO L175 Difference]: Start difference. First operand has 196 places, 271 transitions, 3722 flow. Second operand 8 states and 230 transitions. [2024-06-20 15:28:36,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 318 transitions, 5064 flow [2024-06-20 15:28:37,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 318 transitions, 4748 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:37,536 INFO L231 Difference]: Finished difference. Result has 198 places, 274 transitions, 3861 flow [2024-06-20 15:28:37,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3861, PETRI_PLACES=198, PETRI_TRANSITIONS=274} [2024-06-20 15:28:37,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-20 15:28:37,537 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 274 transitions, 3861 flow [2024-06-20 15:28:37,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:37,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:37,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:37,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:28:37,538 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:37,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:37,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1644488182, now seen corresponding path program 10 times [2024-06-20 15:28:37,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:37,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355175939] [2024-06-20 15:28:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:37,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:37,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:37,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355175939] [2024-06-20 15:28:37,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355175939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:37,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:37,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:37,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137833628] [2024-06-20 15:28:37,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:37,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:37,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:37,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:37,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:37,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:37,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 274 transitions, 3861 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:37,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:37,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:37,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:38,507 INFO L124 PetriNetUnfolderBase]: 3296/5663 cut-off events. [2024-06-20 15:28:38,507 INFO L125 PetriNetUnfolderBase]: For 343944/343944 co-relation queries the response was YES. [2024-06-20 15:28:38,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36245 conditions, 5663 events. 3296/5663 cut-off events. For 343944/343944 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 38404 event pairs, 1008 based on Foata normal form. 50/5707 useless extension candidates. Maximal degree in co-relation 36153. Up to 4353 conditions per place. [2024-06-20 15:28:38,561 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 118 changer transitions 0/310 dead transitions. [2024-06-20 15:28:38,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 310 transitions, 4881 flow [2024-06-20 15:28:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-20 15:28:38,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 15:28:38,562 INFO L175 Difference]: Start difference. First operand has 198 places, 274 transitions, 3861 flow. Second operand 8 states and 224 transitions. [2024-06-20 15:28:38,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 310 transitions, 4881 flow [2024-06-20 15:28:39,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 310 transitions, 4558 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:39,204 INFO L231 Difference]: Finished difference. Result has 202 places, 274 transitions, 3783 flow [2024-06-20 15:28:39,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3783, PETRI_PLACES=202, PETRI_TRANSITIONS=274} [2024-06-20 15:28:39,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-20 15:28:39,205 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 274 transitions, 3783 flow [2024-06-20 15:28:39,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:39,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:39,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:39,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:28:39,205 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:39,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:39,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1398852310, now seen corresponding path program 2 times [2024-06-20 15:28:39,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:39,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323204337] [2024-06-20 15:28:39,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:39,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:39,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:39,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323204337] [2024-06-20 15:28:39,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323204337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:39,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:39,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:39,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198729665] [2024-06-20 15:28:39,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:39,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:39,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:39,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:39,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:39,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 274 transitions, 3783 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:39,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:39,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:39,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:40,222 INFO L124 PetriNetUnfolderBase]: 3425/5912 cut-off events. [2024-06-20 15:28:40,222 INFO L125 PetriNetUnfolderBase]: For 336010/336010 co-relation queries the response was YES. [2024-06-20 15:28:40,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37028 conditions, 5912 events. 3425/5912 cut-off events. For 336010/336010 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 40704 event pairs, 1010 based on Foata normal form. 42/5948 useless extension candidates. Maximal degree in co-relation 36934. Up to 4115 conditions per place. [2024-06-20 15:28:40,280 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 180 selfloop transitions, 122 changer transitions 6/317 dead transitions. [2024-06-20 15:28:40,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 317 transitions, 4853 flow [2024-06-20 15:28:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-20 15:28:40,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-20 15:28:40,281 INFO L175 Difference]: Start difference. First operand has 202 places, 274 transitions, 3783 flow. Second operand 8 states and 229 transitions. [2024-06-20 15:28:40,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 317 transitions, 4853 flow [2024-06-20 15:28:40,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 317 transitions, 4593 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:28:40,900 INFO L231 Difference]: Finished difference. Result has 203 places, 275 transitions, 3867 flow [2024-06-20 15:28:40,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3867, PETRI_PLACES=203, PETRI_TRANSITIONS=275} [2024-06-20 15:28:40,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-20 15:28:40,900 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 275 transitions, 3867 flow [2024-06-20 15:28:40,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:40,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:40,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:40,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:28:40,901 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:40,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:40,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1644242228, now seen corresponding path program 3 times [2024-06-20 15:28:40,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:40,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828783275] [2024-06-20 15:28:40,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:40,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:41,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:41,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828783275] [2024-06-20 15:28:41,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828783275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:41,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:41,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:41,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208171106] [2024-06-20 15:28:41,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:41,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:41,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:41,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:41,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 275 transitions, 3867 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:41,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:41,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:41,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:41,849 INFO L124 PetriNetUnfolderBase]: 3546/6157 cut-off events. [2024-06-20 15:28:41,849 INFO L125 PetriNetUnfolderBase]: For 356309/356309 co-relation queries the response was YES. [2024-06-20 15:28:41,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38454 conditions, 6157 events. 3546/6157 cut-off events. For 356309/356309 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42874 event pairs, 1071 based on Foata normal form. 42/6193 useless extension candidates. Maximal degree in co-relation 38359. Up to 4444 conditions per place. [2024-06-20 15:28:41,906 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 189 selfloop transitions, 121 changer transitions 0/319 dead transitions. [2024-06-20 15:28:41,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 319 transitions, 5059 flow [2024-06-20 15:28:41,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-20 15:28:41,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-20 15:28:41,907 INFO L175 Difference]: Start difference. First operand has 203 places, 275 transitions, 3867 flow. Second operand 8 states and 229 transitions. [2024-06-20 15:28:41,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 319 transitions, 5059 flow [2024-06-20 15:28:42,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 319 transitions, 4724 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:42,561 INFO L231 Difference]: Finished difference. Result has 205 places, 277 transitions, 3895 flow [2024-06-20 15:28:42,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3895, PETRI_PLACES=205, PETRI_TRANSITIONS=277} [2024-06-20 15:28:42,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-20 15:28:42,562 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 277 transitions, 3895 flow [2024-06-20 15:28:42,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:42,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:42,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:42,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:28:42,563 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:42,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:42,563 INFO L85 PathProgramCache]: Analyzing trace with hash -158870230, now seen corresponding path program 4 times [2024-06-20 15:28:42,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:42,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950304860] [2024-06-20 15:28:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:42,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:42,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:42,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950304860] [2024-06-20 15:28:42,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950304860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:42,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:42,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:42,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493772722] [2024-06-20 15:28:42,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:42,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:42,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:42,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:42,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:42,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 277 transitions, 3895 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:42,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:42,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:42,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:43,553 INFO L124 PetriNetUnfolderBase]: 3763/6553 cut-off events. [2024-06-20 15:28:43,553 INFO L125 PetriNetUnfolderBase]: For 391983/391983 co-relation queries the response was YES. [2024-06-20 15:28:43,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40338 conditions, 6553 events. 3763/6553 cut-off events. For 391983/391983 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46455 event pairs, 1104 based on Foata normal form. 42/6589 useless extension candidates. Maximal degree in co-relation 40242. Up to 3049 conditions per place. [2024-06-20 15:28:43,618 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 185 selfloop transitions, 130 changer transitions 0/324 dead transitions. [2024-06-20 15:28:43,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 324 transitions, 5091 flow [2024-06-20 15:28:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:43,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-20 15:28:43,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-20 15:28:43,619 INFO L175 Difference]: Start difference. First operand has 205 places, 277 transitions, 3895 flow. Second operand 8 states and 231 transitions. [2024-06-20 15:28:43,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 324 transitions, 5091 flow [2024-06-20 15:28:44,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 324 transitions, 4758 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:44,223 INFO L231 Difference]: Finished difference. Result has 206 places, 277 transitions, 3793 flow [2024-06-20 15:28:44,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3793, PETRI_PLACES=206, PETRI_TRANSITIONS=277} [2024-06-20 15:28:44,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-20 15:28:44,224 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 277 transitions, 3793 flow [2024-06-20 15:28:44,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:44,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:44,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:44,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:28:44,225 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:44,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:44,225 INFO L85 PathProgramCache]: Analyzing trace with hash 2099085123, now seen corresponding path program 1 times [2024-06-20 15:28:44,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:44,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108322886] [2024-06-20 15:28:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:44,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:44,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:44,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108322886] [2024-06-20 15:28:44,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108322886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:44,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:44,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:44,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031841679] [2024-06-20 15:28:44,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:44,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:44,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:44,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:44,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:44,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 277 transitions, 3793 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:44,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:44,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:44,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:45,099 INFO L124 PetriNetUnfolderBase]: 3779/6571 cut-off events. [2024-06-20 15:28:45,099 INFO L125 PetriNetUnfolderBase]: For 341834/341834 co-relation queries the response was YES. [2024-06-20 15:28:45,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40366 conditions, 6571 events. 3779/6571 cut-off events. For 341834/341834 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46625 event pairs, 1308 based on Foata normal form. 4/6566 useless extension candidates. Maximal degree in co-relation 40269. Up to 5930 conditions per place. [2024-06-20 15:28:45,166 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 243 selfloop transitions, 39 changer transitions 0/291 dead transitions. [2024-06-20 15:28:45,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 291 transitions, 4431 flow [2024-06-20 15:28:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:28:45,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-20 15:28:45,168 INFO L175 Difference]: Start difference. First operand has 206 places, 277 transitions, 3793 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:28:45,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 291 transitions, 4431 flow [2024-06-20 15:28:45,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 291 transitions, 4076 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:45,751 INFO L231 Difference]: Finished difference. Result has 206 places, 280 transitions, 3576 flow [2024-06-20 15:28:45,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3576, PETRI_PLACES=206, PETRI_TRANSITIONS=280} [2024-06-20 15:28:45,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-20 15:28:45,751 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 280 transitions, 3576 flow [2024-06-20 15:28:45,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:45,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:45,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:45,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:28:45,752 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:45,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:45,753 INFO L85 PathProgramCache]: Analyzing trace with hash 616383391, now seen corresponding path program 2 times [2024-06-20 15:28:45,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:45,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642251650] [2024-06-20 15:28:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:45,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:45,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:45,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642251650] [2024-06-20 15:28:45,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642251650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:45,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:45,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:45,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820629133] [2024-06-20 15:28:45,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:45,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:45,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:45,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:45,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:45,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:45,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 280 transitions, 3576 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:45,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:45,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:45,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:46,678 INFO L124 PetriNetUnfolderBase]: 3655/6361 cut-off events. [2024-06-20 15:28:46,678 INFO L125 PetriNetUnfolderBase]: For 295688/295688 co-relation queries the response was YES. [2024-06-20 15:28:46,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37323 conditions, 6361 events. 3655/6361 cut-off events. For 295688/295688 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 44811 event pairs, 1215 based on Foata normal form. 4/6356 useless extension candidates. Maximal degree in co-relation 37225. Up to 5690 conditions per place. [2024-06-20 15:28:46,729 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 243 selfloop transitions, 43 changer transitions 0/295 dead transitions. [2024-06-20 15:28:46,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 295 transitions, 4230 flow [2024-06-20 15:28:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:28:46,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-20 15:28:46,730 INFO L175 Difference]: Start difference. First operand has 206 places, 280 transitions, 3576 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:28:46,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 295 transitions, 4230 flow [2024-06-20 15:28:47,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 295 transitions, 4114 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:47,398 INFO L231 Difference]: Finished difference. Result has 208 places, 283 transitions, 3612 flow [2024-06-20 15:28:47,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3612, PETRI_PLACES=208, PETRI_TRANSITIONS=283} [2024-06-20 15:28:47,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-20 15:28:47,399 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 283 transitions, 3612 flow [2024-06-20 15:28:47,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:47,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:47,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:47,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:28:47,400 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:47,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:47,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1127082749, now seen corresponding path program 1 times [2024-06-20 15:28:47,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:47,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117124114] [2024-06-20 15:28:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:47,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:47,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:47,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117124114] [2024-06-20 15:28:47,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117124114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:47,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:47,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:28:47,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973874166] [2024-06-20 15:28:47,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:47,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:28:47,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:47,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:28:47,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:28:47,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:47,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 283 transitions, 3612 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:47,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:47,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:47,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:48,297 INFO L124 PetriNetUnfolderBase]: 3683/6422 cut-off events. [2024-06-20 15:28:48,298 INFO L125 PetriNetUnfolderBase]: For 304908/304908 co-relation queries the response was YES. [2024-06-20 15:28:48,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37957 conditions, 6422 events. 3683/6422 cut-off events. For 304908/304908 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45217 event pairs, 1206 based on Foata normal form. 2/6420 useless extension candidates. Maximal degree in co-relation 37858. Up to 5648 conditions per place. [2024-06-20 15:28:48,364 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 61 changer transitions 0/311 dead transitions. [2024-06-20 15:28:48,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 311 transitions, 4719 flow [2024-06-20 15:28:48,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:28:48,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:28:48,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:28:48,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-20 15:28:48,366 INFO L175 Difference]: Start difference. First operand has 208 places, 283 transitions, 3612 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:28:48,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 311 transitions, 4719 flow [2024-06-20 15:28:48,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 311 transitions, 4589 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:48,981 INFO L231 Difference]: Finished difference. Result has 212 places, 291 transitions, 3734 flow [2024-06-20 15:28:48,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3734, PETRI_PLACES=212, PETRI_TRANSITIONS=291} [2024-06-20 15:28:48,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-20 15:28:48,982 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 291 transitions, 3734 flow [2024-06-20 15:28:48,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:48,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:48,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:48,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:28:48,983 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:48,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash -933213391, now seen corresponding path program 2 times [2024-06-20 15:28:48,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:48,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63785811] [2024-06-20 15:28:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:49,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:49,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63785811] [2024-06-20 15:28:49,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63785811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:49,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:49,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:49,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608290626] [2024-06-20 15:28:49,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:49,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:49,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:49,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:49,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:49,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 291 transitions, 3734 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:49,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:49,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:49,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:49,859 INFO L124 PetriNetUnfolderBase]: 3693/6414 cut-off events. [2024-06-20 15:28:49,859 INFO L125 PetriNetUnfolderBase]: For 315485/315485 co-relation queries the response was YES. [2024-06-20 15:28:49,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38241 conditions, 6414 events. 3693/6414 cut-off events. For 315485/315485 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45099 event pairs, 1235 based on Foata normal form. 2/6400 useless extension candidates. Maximal degree in co-relation 38140. Up to 5658 conditions per place. [2024-06-20 15:28:49,919 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 68 changer transitions 0/308 dead transitions. [2024-06-20 15:28:49,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 308 transitions, 4782 flow [2024-06-20 15:28:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:28:49,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-20 15:28:49,921 INFO L175 Difference]: Start difference. First operand has 212 places, 291 transitions, 3734 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:28:49,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 308 transitions, 4782 flow [2024-06-20 15:28:50,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 308 transitions, 4667 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:50,600 INFO L231 Difference]: Finished difference. Result has 215 places, 295 transitions, 3828 flow [2024-06-20 15:28:50,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3828, PETRI_PLACES=215, PETRI_TRANSITIONS=295} [2024-06-20 15:28:50,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-20 15:28:50,601 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 295 transitions, 3828 flow [2024-06-20 15:28:50,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:50,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:50,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:50,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:28:50,601 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:50,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:50,602 INFO L85 PathProgramCache]: Analyzing trace with hash -36159865, now seen corresponding path program 3 times [2024-06-20 15:28:50,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:50,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082489541] [2024-06-20 15:28:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:50,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:50,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:50,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082489541] [2024-06-20 15:28:50,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082489541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:50,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:50,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:50,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048481067] [2024-06-20 15:28:50,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:50,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:50,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:50,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:50,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:50,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:50,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 295 transitions, 3828 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:50,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:50,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:50,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:51,454 INFO L124 PetriNetUnfolderBase]: 3689/6410 cut-off events. [2024-06-20 15:28:51,454 INFO L125 PetriNetUnfolderBase]: For 321728/321728 co-relation queries the response was YES. [2024-06-20 15:28:51,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38221 conditions, 6410 events. 3689/6410 cut-off events. For 321728/321728 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45123 event pairs, 1235 based on Foata normal form. 2/6396 useless extension candidates. Maximal degree in co-relation 38118. Up to 5656 conditions per place. [2024-06-20 15:28:51,516 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 63 changer transitions 0/308 dead transitions. [2024-06-20 15:28:51,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 308 transitions, 4816 flow [2024-06-20 15:28:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:51,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:28:51,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:28:51,517 INFO L175 Difference]: Start difference. First operand has 215 places, 295 transitions, 3828 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:28:51,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 308 transitions, 4816 flow [2024-06-20 15:28:52,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 308 transitions, 4640 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:52,388 INFO L231 Difference]: Finished difference. Result has 217 places, 295 transitions, 3786 flow [2024-06-20 15:28:52,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3652, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3786, PETRI_PLACES=217, PETRI_TRANSITIONS=295} [2024-06-20 15:28:52,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-20 15:28:52,389 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 295 transitions, 3786 flow [2024-06-20 15:28:52,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:52,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:52,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:52,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:28:52,389 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:52,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash 946483229, now seen corresponding path program 4 times [2024-06-20 15:28:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:52,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544625770] [2024-06-20 15:28:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:52,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:52,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:52,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544625770] [2024-06-20 15:28:52,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544625770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:52,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:52,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:52,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565591136] [2024-06-20 15:28:52,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:52,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:52,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:52,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:52,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:52,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:52,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 295 transitions, 3786 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:52,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:52,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:52,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:53,248 INFO L124 PetriNetUnfolderBase]: 3699/6450 cut-off events. [2024-06-20 15:28:53,249 INFO L125 PetriNetUnfolderBase]: For 330373/330373 co-relation queries the response was YES. [2024-06-20 15:28:53,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38425 conditions, 6450 events. 3699/6450 cut-off events. For 330373/330373 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45524 event pairs, 1215 based on Foata normal form. 2/6448 useless extension candidates. Maximal degree in co-relation 38323. Up to 5666 conditions per place. [2024-06-20 15:28:53,309 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 68 changer transitions 1/317 dead transitions. [2024-06-20 15:28:53,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 317 transitions, 4755 flow [2024-06-20 15:28:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-20 15:28:53,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-20 15:28:53,311 INFO L175 Difference]: Start difference. First operand has 217 places, 295 transitions, 3786 flow. Second operand 6 states and 161 transitions. [2024-06-20 15:28:53,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 317 transitions, 4755 flow [2024-06-20 15:28:53,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 317 transitions, 4542 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:28:53,927 INFO L231 Difference]: Finished difference. Result has 216 places, 298 transitions, 3768 flow [2024-06-20 15:28:53,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3768, PETRI_PLACES=216, PETRI_TRANSITIONS=298} [2024-06-20 15:28:53,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-20 15:28:53,928 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 298 transitions, 3768 flow [2024-06-20 15:28:53,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:53,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:53,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:53,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:28:53,928 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:53,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:53,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1741764323, now seen corresponding path program 5 times [2024-06-20 15:28:53,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:53,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876261219] [2024-06-20 15:28:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:53,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:54,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:54,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876261219] [2024-06-20 15:28:54,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876261219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:54,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:54,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:54,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716586537] [2024-06-20 15:28:54,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:54,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:54,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:54,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:54,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:54,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:54,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 298 transitions, 3768 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:54,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:54,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:54,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:54,873 INFO L124 PetriNetUnfolderBase]: 3707/6453 cut-off events. [2024-06-20 15:28:54,874 INFO L125 PetriNetUnfolderBase]: For 340385/340385 co-relation queries the response was YES. [2024-06-20 15:28:54,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38575 conditions, 6453 events. 3707/6453 cut-off events. For 340385/340385 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45567 event pairs, 1245 based on Foata normal form. 2/6442 useless extension candidates. Maximal degree in co-relation 38475. Up to 5676 conditions per place. [2024-06-20 15:28:54,935 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 72 changer transitions 1/314 dead transitions. [2024-06-20 15:28:54,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 314 transitions, 4721 flow [2024-06-20 15:28:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:28:54,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:28:54,936 INFO L175 Difference]: Start difference. First operand has 216 places, 298 transitions, 3768 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:28:54,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 314 transitions, 4721 flow [2024-06-20 15:28:55,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 314 transitions, 4611 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 15:28:55,663 INFO L231 Difference]: Finished difference. Result has 219 places, 301 transitions, 3856 flow [2024-06-20 15:28:55,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3661, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3856, PETRI_PLACES=219, PETRI_TRANSITIONS=301} [2024-06-20 15:28:55,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-20 15:28:55,664 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 301 transitions, 3856 flow [2024-06-20 15:28:55,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:55,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:55,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:55,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:28:55,664 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:55,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash -285272941, now seen corresponding path program 6 times [2024-06-20 15:28:55,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:55,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355576190] [2024-06-20 15:28:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:55,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:55,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355576190] [2024-06-20 15:28:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355576190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:55,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:55,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:55,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548496823] [2024-06-20 15:28:55,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:55,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:55,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:55,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:55,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 301 transitions, 3856 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:55,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:55,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:55,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:56,589 INFO L124 PetriNetUnfolderBase]: 3638/6330 cut-off events. [2024-06-20 15:28:56,590 INFO L125 PetriNetUnfolderBase]: For 345416/345416 co-relation queries the response was YES. [2024-06-20 15:28:56,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38080 conditions, 6330 events. 3638/6330 cut-off events. For 345416/345416 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 44431 event pairs, 1171 based on Foata normal form. 2/6328 useless extension candidates. Maximal degree in co-relation 37979. Up to 5550 conditions per place. [2024-06-20 15:28:56,651 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 70 changer transitions 3/315 dead transitions. [2024-06-20 15:28:56,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 315 transitions, 4628 flow [2024-06-20 15:28:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:28:56,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-20 15:28:56,652 INFO L175 Difference]: Start difference. First operand has 219 places, 301 transitions, 3856 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:28:56,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 315 transitions, 4628 flow [2024-06-20 15:28:57,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 315 transitions, 4470 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:28:57,258 INFO L231 Difference]: Finished difference. Result has 221 places, 298 transitions, 3803 flow [2024-06-20 15:28:57,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3803, PETRI_PLACES=221, PETRI_TRANSITIONS=298} [2024-06-20 15:28:57,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-20 15:28:57,259 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 298 transitions, 3803 flow [2024-06-20 15:28:57,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:57,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:57,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:57,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:28:57,260 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:57,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1741756387, now seen corresponding path program 1 times [2024-06-20 15:28:57,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:57,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689387597] [2024-06-20 15:28:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:57,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:57,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:57,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689387597] [2024-06-20 15:28:57,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689387597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:57,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:57,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:57,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119964036] [2024-06-20 15:28:57,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:57,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:57,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:57,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:57,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:57,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:57,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 298 transitions, 3803 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:57,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:57,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:57,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:58,134 INFO L124 PetriNetUnfolderBase]: 3470/6033 cut-off events. [2024-06-20 15:28:58,134 INFO L125 PetriNetUnfolderBase]: For 359298/359298 co-relation queries the response was YES. [2024-06-20 15:28:58,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37304 conditions, 6033 events. 3470/6033 cut-off events. For 359298/359298 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 41903 event pairs, 1086 based on Foata normal form. 4/6028 useless extension candidates. Maximal degree in co-relation 37203. Up to 5393 conditions per place. [2024-06-20 15:28:58,188 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 266 selfloop transitions, 37 changer transitions 0/312 dead transitions. [2024-06-20 15:28:58,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 312 transitions, 4491 flow [2024-06-20 15:28:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:28:58,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-20 15:28:58,190 INFO L175 Difference]: Start difference. First operand has 221 places, 298 transitions, 3803 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:28:58,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 312 transitions, 4491 flow [2024-06-20 15:28:58,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 312 transitions, 4209 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 15:28:58,893 INFO L231 Difference]: Finished difference. Result has 219 places, 301 transitions, 3663 flow [2024-06-20 15:28:58,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3663, PETRI_PLACES=219, PETRI_TRANSITIONS=301} [2024-06-20 15:28:58,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-20 15:28:58,894 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 301 transitions, 3663 flow [2024-06-20 15:28:58,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:58,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:58,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:58,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:28:58,894 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:28:58,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:58,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1998256897, now seen corresponding path program 2 times [2024-06-20 15:28:58,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:58,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163363376] [2024-06-20 15:28:58,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:58,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:58,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:58,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163363376] [2024-06-20 15:28:58,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163363376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:58,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:58,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:28:58,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980617862] [2024-06-20 15:28:58,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:58,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:28:58,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:58,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:28:58,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:28:59,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:28:59,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 301 transitions, 3663 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:28:59,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:59,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:28:59,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:59,742 INFO L124 PetriNetUnfolderBase]: 3486/6072 cut-off events. [2024-06-20 15:28:59,743 INFO L125 PetriNetUnfolderBase]: For 368078/368078 co-relation queries the response was YES. [2024-06-20 15:28:59,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37457 conditions, 6072 events. 3486/6072 cut-off events. For 368078/368078 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42236 event pairs, 1077 based on Foata normal form. 4/6072 useless extension candidates. Maximal degree in co-relation 37355. Up to 5417 conditions per place. [2024-06-20 15:28:59,800 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 40 changer transitions 0/318 dead transitions. [2024-06-20 15:28:59,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 318 transitions, 4377 flow [2024-06-20 15:28:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:28:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:28:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:28:59,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:28:59,802 INFO L175 Difference]: Start difference. First operand has 219 places, 301 transitions, 3663 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:28:59,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 318 transitions, 4377 flow [2024-06-20 15:29:00,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 318 transitions, 4257 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 15:29:00,701 INFO L231 Difference]: Finished difference. Result has 221 places, 304 transitions, 3697 flow [2024-06-20 15:29:00,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3697, PETRI_PLACES=221, PETRI_TRANSITIONS=304} [2024-06-20 15:29:00,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-20 15:29:00,702 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 304 transitions, 3697 flow [2024-06-20 15:29:00,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:29:00,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:00,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:00,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:29:00,703 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:00,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:00,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1732233187, now seen corresponding path program 3 times [2024-06-20 15:29:00,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:00,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966206219] [2024-06-20 15:29:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:00,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:00,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:00,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966206219] [2024-06-20 15:29:00,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966206219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:00,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:00,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:29:00,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500417889] [2024-06-20 15:29:00,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:00,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:29:00,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:00,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:29:00,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:29:00,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:00,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 304 transitions, 3697 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:29:00,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:00,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:00,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:01,620 INFO L124 PetriNetUnfolderBase]: 3489/6074 cut-off events. [2024-06-20 15:29:01,620 INFO L125 PetriNetUnfolderBase]: For 375456/375456 co-relation queries the response was YES. [2024-06-20 15:29:01,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37542 conditions, 6074 events. 3489/6074 cut-off events. For 375456/375456 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42321 event pairs, 1081 based on Foata normal form. 4/6069 useless extension candidates. Maximal degree in co-relation 37439. Up to 5370 conditions per place. [2024-06-20 15:29:01,676 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 264 selfloop transitions, 46 changer transitions 0/319 dead transitions. [2024-06-20 15:29:01,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 319 transitions, 4413 flow [2024-06-20 15:29:01,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:29:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:29:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:29:01,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-20 15:29:01,677 INFO L175 Difference]: Start difference. First operand has 221 places, 304 transitions, 3697 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:29:01,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 319 transitions, 4413 flow [2024-06-20 15:29:02,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 319 transitions, 4281 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 15:29:02,496 INFO L231 Difference]: Finished difference. Result has 223 places, 307 transitions, 3737 flow [2024-06-20 15:29:02,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3737, PETRI_PLACES=223, PETRI_TRANSITIONS=307} [2024-06-20 15:29:02,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-20 15:29:02,497 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 307 transitions, 3737 flow [2024-06-20 15:29:02,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:29:02,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:02,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:02,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:29:02,498 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:02,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:02,498 INFO L85 PathProgramCache]: Analyzing trace with hash -567846408, now seen corresponding path program 1 times [2024-06-20 15:29:02,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:02,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123264314] [2024-06-20 15:29:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:02,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:02,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:02,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123264314] [2024-06-20 15:29:02,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123264314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:02,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:02,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:02,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561068747] [2024-06-20 15:29:02,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:02,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:02,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:02,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:02,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:02,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:02,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 307 transitions, 3737 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:02,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:02,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:02,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:03,391 INFO L124 PetriNetUnfolderBase]: 3494/6074 cut-off events. [2024-06-20 15:29:03,392 INFO L125 PetriNetUnfolderBase]: For 379167/379167 co-relation queries the response was YES. [2024-06-20 15:29:03,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37771 conditions, 6074 events. 3494/6074 cut-off events. For 379167/379167 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 42062 event pairs, 1044 based on Foata normal form. 1/6061 useless extension candidates. Maximal degree in co-relation 37667. Up to 5291 conditions per place. [2024-06-20 15:29:03,452 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 85 changer transitions 0/336 dead transitions. [2024-06-20 15:29:03,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 4899 flow [2024-06-20 15:29:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 15:29:03,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-20 15:29:03,453 INFO L175 Difference]: Start difference. First operand has 223 places, 307 transitions, 3737 flow. Second operand 7 states and 189 transitions. [2024-06-20 15:29:03,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 4899 flow [2024-06-20 15:29:04,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 336 transitions, 4749 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-20 15:29:04,105 INFO L231 Difference]: Finished difference. Result has 226 places, 310 transitions, 3805 flow [2024-06-20 15:29:04,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3805, PETRI_PLACES=226, PETRI_TRANSITIONS=310} [2024-06-20 15:29:04,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-20 15:29:04,106 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 310 transitions, 3805 flow [2024-06-20 15:29:04,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:04,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:04,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:04,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:29:04,106 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:04,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:04,106 INFO L85 PathProgramCache]: Analyzing trace with hash 986087862, now seen corresponding path program 2 times [2024-06-20 15:29:04,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:04,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365236161] [2024-06-20 15:29:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:04,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:04,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:04,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365236161] [2024-06-20 15:29:04,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365236161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:04,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:04,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:04,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971447998] [2024-06-20 15:29:04,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:04,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:04,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:04,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:04,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:04,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:04,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 310 transitions, 3805 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:04,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:04,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:04,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:05,087 INFO L124 PetriNetUnfolderBase]: 3499/6086 cut-off events. [2024-06-20 15:29:05,087 INFO L125 PetriNetUnfolderBase]: For 389010/389010 co-relation queries the response was YES. [2024-06-20 15:29:05,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37950 conditions, 6086 events. 3499/6086 cut-off events. For 389010/389010 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42163 event pairs, 1078 based on Foata normal form. 1/6074 useless extension candidates. Maximal degree in co-relation 37845. Up to 5295 conditions per place. [2024-06-20 15:29:05,147 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 88 changer transitions 0/333 dead transitions. [2024-06-20 15:29:05,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 333 transitions, 4951 flow [2024-06-20 15:29:05,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:29:05,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:29:05,148 INFO L175 Difference]: Start difference. First operand has 226 places, 310 transitions, 3805 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:29:05,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 333 transitions, 4951 flow [2024-06-20 15:29:05,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 333 transitions, 4805 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:29:05,874 INFO L231 Difference]: Finished difference. Result has 229 places, 313 transitions, 3883 flow [2024-06-20 15:29:05,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3665, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3883, PETRI_PLACES=229, PETRI_TRANSITIONS=313} [2024-06-20 15:29:05,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-20 15:29:05,874 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 313 transitions, 3883 flow [2024-06-20 15:29:05,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:05,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:05,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:05,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:29:05,875 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:05,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1415657962, now seen corresponding path program 1 times [2024-06-20 15:29:05,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:05,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694268504] [2024-06-20 15:29:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:05,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:05,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:05,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694268504] [2024-06-20 15:29:05,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694268504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:05,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:05,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:05,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089336879] [2024-06-20 15:29:05,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:05,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:05,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:05,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:05,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:06,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:06,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 313 transitions, 3883 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:06,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:06,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:06,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:06,871 INFO L124 PetriNetUnfolderBase]: 3515/6113 cut-off events. [2024-06-20 15:29:06,872 INFO L125 PetriNetUnfolderBase]: For 406769/406769 co-relation queries the response was YES. [2024-06-20 15:29:06,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38239 conditions, 6113 events. 3515/6113 cut-off events. For 406769/406769 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42308 event pairs, 948 based on Foata normal form. 4/6115 useless extension candidates. Maximal degree in co-relation 38133. Up to 5411 conditions per place. [2024-06-20 15:29:06,943 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 312 selfloop transitions, 28 changer transitions 0/349 dead transitions. [2024-06-20 15:29:06,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 349 transitions, 4814 flow [2024-06-20 15:29:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:06,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:29:06,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-20 15:29:06,945 INFO L175 Difference]: Start difference. First operand has 229 places, 313 transitions, 3883 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:29:06,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 349 transitions, 4814 flow [2024-06-20 15:29:07,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 349 transitions, 4672 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:29:07,791 INFO L231 Difference]: Finished difference. Result has 233 places, 316 transitions, 3838 flow [2024-06-20 15:29:07,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3838, PETRI_PLACES=233, PETRI_TRANSITIONS=316} [2024-06-20 15:29:07,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-20 15:29:07,792 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 316 transitions, 3838 flow [2024-06-20 15:29:07,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:07,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:07,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:07,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:29:07,793 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:07,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:07,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1406134762, now seen corresponding path program 2 times [2024-06-20 15:29:07,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:07,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460832813] [2024-06-20 15:29:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:07,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:07,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:07,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460832813] [2024-06-20 15:29:07,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460832813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:07,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:07,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:07,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783273112] [2024-06-20 15:29:07,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:07,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:07,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:07,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:07,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:07,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:07,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 316 transitions, 3838 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:07,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:07,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:07,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:08,841 INFO L124 PetriNetUnfolderBase]: 3495/6086 cut-off events. [2024-06-20 15:29:08,841 INFO L125 PetriNetUnfolderBase]: For 407376/407376 co-relation queries the response was YES. [2024-06-20 15:29:08,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37828 conditions, 6086 events. 3495/6086 cut-off events. For 407376/407376 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42243 event pairs, 1045 based on Foata normal form. 4/6088 useless extension candidates. Maximal degree in co-relation 37721. Up to 5497 conditions per place. [2024-06-20 15:29:08,905 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 314 selfloop transitions, 21 changer transitions 0/344 dead transitions. [2024-06-20 15:29:08,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 344 transitions, 4578 flow [2024-06-20 15:29:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:29:08,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-20 15:29:08,906 INFO L175 Difference]: Start difference. First operand has 233 places, 316 transitions, 3838 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:29:08,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 344 transitions, 4578 flow [2024-06-20 15:29:09,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 344 transitions, 4523 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:29:09,930 INFO L231 Difference]: Finished difference. Result has 236 places, 316 transitions, 3831 flow [2024-06-20 15:29:09,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3783, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3831, PETRI_PLACES=236, PETRI_TRANSITIONS=316} [2024-06-20 15:29:09,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-20 15:29:09,931 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 316 transitions, 3831 flow [2024-06-20 15:29:09,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:09,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:09,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:09,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:29:09,932 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:09,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:09,932 INFO L85 PathProgramCache]: Analyzing trace with hash 986084886, now seen corresponding path program 3 times [2024-06-20 15:29:09,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:09,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919972438] [2024-06-20 15:29:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:09,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:10,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:10,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919972438] [2024-06-20 15:29:10,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919972438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:10,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:10,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:10,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998298703] [2024-06-20 15:29:10,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:10,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:10,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:10,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:10,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:10,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:10,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 316 transitions, 3831 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:10,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:10,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:10,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:10,883 INFO L124 PetriNetUnfolderBase]: 3511/6098 cut-off events. [2024-06-20 15:29:10,883 INFO L125 PetriNetUnfolderBase]: For 421421/421421 co-relation queries the response was YES. [2024-06-20 15:29:10,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38239 conditions, 6098 events. 3511/6098 cut-off events. For 421421/421421 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42273 event pairs, 1068 based on Foata normal form. 4/6089 useless extension candidates. Maximal degree in co-relation 38131. Up to 5299 conditions per place. [2024-06-20 15:29:10,962 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 91 changer transitions 0/340 dead transitions. [2024-06-20 15:29:10,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 340 transitions, 5065 flow [2024-06-20 15:29:10,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 15:29:10,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-20 15:29:10,964 INFO L175 Difference]: Start difference. First operand has 236 places, 316 transitions, 3831 flow. Second operand 7 states and 183 transitions. [2024-06-20 15:29:10,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 340 transitions, 5065 flow [2024-06-20 15:29:11,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 340 transitions, 4993 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 15:29:12,001 INFO L231 Difference]: Finished difference. Result has 235 places, 319 transitions, 4049 flow [2024-06-20 15:29:12,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3759, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4049, PETRI_PLACES=235, PETRI_TRANSITIONS=319} [2024-06-20 15:29:12,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-20 15:29:12,002 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 319 transitions, 4049 flow [2024-06-20 15:29:12,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:12,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:12,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:12,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:29:12,002 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:12,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1125194538, now seen corresponding path program 1 times [2024-06-20 15:29:12,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:12,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53465675] [2024-06-20 15:29:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:12,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:12,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:12,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53465675] [2024-06-20 15:29:12,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53465675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:12,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:12,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:12,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48482599] [2024-06-20 15:29:12,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:12,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:12,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:12,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:12,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 319 transitions, 4049 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:12,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:12,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:12,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:12,941 INFO L124 PetriNetUnfolderBase]: 3516/6106 cut-off events. [2024-06-20 15:29:12,941 INFO L125 PetriNetUnfolderBase]: For 426449/426449 co-relation queries the response was YES. [2024-06-20 15:29:12,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38751 conditions, 6106 events. 3516/6106 cut-off events. For 426449/426449 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 42331 event pairs, 1077 based on Foata normal form. 1/6095 useless extension candidates. Maximal degree in co-relation 38642. Up to 5336 conditions per place. [2024-06-20 15:29:13,117 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 78 changer transitions 0/346 dead transitions. [2024-06-20 15:29:13,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 346 transitions, 4957 flow [2024-06-20 15:29:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 15:29:13,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-20 15:29:13,118 INFO L175 Difference]: Start difference. First operand has 235 places, 319 transitions, 4049 flow. Second operand 7 states and 186 transitions. [2024-06-20 15:29:13,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 346 transitions, 4957 flow [2024-06-20 15:29:14,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 346 transitions, 4689 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-20 15:29:14,275 INFO L231 Difference]: Finished difference. Result has 237 places, 322 transitions, 3973 flow [2024-06-20 15:29:14,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3973, PETRI_PLACES=237, PETRI_TRANSITIONS=322} [2024-06-20 15:29:14,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-20 15:29:14,276 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 322 transitions, 3973 flow [2024-06-20 15:29:14,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:14,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:14,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:14,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:29:14,276 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:14,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:14,277 INFO L85 PathProgramCache]: Analyzing trace with hash 634389880, now seen corresponding path program 2 times [2024-06-20 15:29:14,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:14,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9282236] [2024-06-20 15:29:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:14,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:14,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:14,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9282236] [2024-06-20 15:29:14,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9282236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:14,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:14,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:29:14,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928743770] [2024-06-20 15:29:14,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:14,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:29:14,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:14,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:29:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:29:14,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:14,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 322 transitions, 3973 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:29:14,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:14,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:14,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:15,159 INFO L124 PetriNetUnfolderBase]: 3529/6127 cut-off events. [2024-06-20 15:29:15,159 INFO L125 PetriNetUnfolderBase]: For 437587/437587 co-relation queries the response was YES. [2024-06-20 15:29:15,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38791 conditions, 6127 events. 3529/6127 cut-off events. For 437587/437587 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 42497 event pairs, 1077 based on Foata normal form. 1/6116 useless extension candidates. Maximal degree in co-relation 38681. Up to 5346 conditions per place. [2024-06-20 15:29:15,225 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 86 changer transitions 0/346 dead transitions. [2024-06-20 15:29:15,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 346 transitions, 5055 flow [2024-06-20 15:29:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:29:15,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:29:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-20 15:29:15,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-20 15:29:15,226 INFO L175 Difference]: Start difference. First operand has 237 places, 322 transitions, 3973 flow. Second operand 6 states and 160 transitions. [2024-06-20 15:29:15,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 346 transitions, 5055 flow [2024-06-20 15:29:16,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 346 transitions, 4895 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:29:16,549 INFO L231 Difference]: Finished difference. Result has 239 places, 328 transitions, 4063 flow [2024-06-20 15:29:16,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4063, PETRI_PLACES=239, PETRI_TRANSITIONS=328} [2024-06-20 15:29:16,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-20 15:29:16,549 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 328 transitions, 4063 flow [2024-06-20 15:29:16,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:29:16,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:16,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:16,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:29:16,550 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:16,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:16,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1974182714, now seen corresponding path program 3 times [2024-06-20 15:29:16,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:16,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940949781] [2024-06-20 15:29:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:16,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:16,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:16,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940949781] [2024-06-20 15:29:16,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940949781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:16,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:16,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:16,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547448394] [2024-06-20 15:29:16,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:16,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:16,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:16,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:16,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:16,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:16,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 328 transitions, 4063 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:16,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:16,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:16,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:17,482 INFO L124 PetriNetUnfolderBase]: 3526/6126 cut-off events. [2024-06-20 15:29:17,483 INFO L125 PetriNetUnfolderBase]: For 446069/446069 co-relation queries the response was YES. [2024-06-20 15:29:17,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38853 conditions, 6126 events. 3526/6126 cut-off events. For 446069/446069 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42610 event pairs, 1059 based on Foata normal form. 1/6121 useless extension candidates. Maximal degree in co-relation 38742. Up to 5334 conditions per place. [2024-06-20 15:29:17,547 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 83 changer transitions 0/350 dead transitions. [2024-06-20 15:29:17,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 350 transitions, 5095 flow [2024-06-20 15:29:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:29:17,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-20 15:29:17,548 INFO L175 Difference]: Start difference. First operand has 239 places, 328 transitions, 4063 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:29:17,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 350 transitions, 5095 flow [2024-06-20 15:29:18,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 350 transitions, 4985 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:29:18,691 INFO L231 Difference]: Finished difference. Result has 244 places, 328 transitions, 4125 flow [2024-06-20 15:29:18,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4125, PETRI_PLACES=244, PETRI_TRANSITIONS=328} [2024-06-20 15:29:18,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-20 15:29:18,691 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 328 transitions, 4125 flow [2024-06-20 15:29:18,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:18,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:18,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:18,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:29:18,692 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:18,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash 218188978, now seen corresponding path program 4 times [2024-06-20 15:29:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:18,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186111887] [2024-06-20 15:29:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:18,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:18,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:18,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186111887] [2024-06-20 15:29:18,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186111887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:18,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:18,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:18,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534535960] [2024-06-20 15:29:18,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:18,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:18,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:18,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:18,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:18,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:18,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 328 transitions, 4125 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:18,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:18,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:18,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:19,585 INFO L124 PetriNetUnfolderBase]: 3520/6096 cut-off events. [2024-06-20 15:29:19,585 INFO L125 PetriNetUnfolderBase]: For 456153/456153 co-relation queries the response was YES. [2024-06-20 15:29:19,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38826 conditions, 6096 events. 3520/6096 cut-off events. For 456153/456153 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 42272 event pairs, 1098 based on Foata normal form. 2/6084 useless extension candidates. Maximal degree in co-relation 38714. Up to 5329 conditions per place. [2024-06-20 15:29:19,645 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 82 changer transitions 0/341 dead transitions. [2024-06-20 15:29:19,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 341 transitions, 5119 flow [2024-06-20 15:29:19,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:29:19,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-20 15:29:19,647 INFO L175 Difference]: Start difference. First operand has 244 places, 328 transitions, 4125 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:29:19,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 341 transitions, 5119 flow [2024-06-20 15:29:20,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 341 transitions, 4884 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:29:20,676 INFO L231 Difference]: Finished difference. Result has 244 places, 328 transitions, 4061 flow [2024-06-20 15:29:20,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4061, PETRI_PLACES=244, PETRI_TRANSITIONS=328} [2024-06-20 15:29:20,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-20 15:29:20,677 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 328 transitions, 4061 flow [2024-06-20 15:29:20,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:20,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:20,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:20,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:29:20,677 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:20,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:20,678 INFO L85 PathProgramCache]: Analyzing trace with hash 140109334, now seen corresponding path program 4 times [2024-06-20 15:29:20,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:20,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640404565] [2024-06-20 15:29:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:20,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:20,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:20,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640404565] [2024-06-20 15:29:20,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640404565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:20,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:20,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:20,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584282652] [2024-06-20 15:29:20,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:20,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:20,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:20,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:20,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:20,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:20,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 328 transitions, 4061 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:20,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:20,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:20,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:21,827 INFO L124 PetriNetUnfolderBase]: 3579/6187 cut-off events. [2024-06-20 15:29:21,827 INFO L125 PetriNetUnfolderBase]: For 516797/516797 co-relation queries the response was YES. [2024-06-20 15:29:21,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39460 conditions, 6187 events. 3579/6187 cut-off events. For 516797/516797 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 42994 event pairs, 1107 based on Foata normal form. 20/6193 useless extension candidates. Maximal degree in co-relation 39347. Up to 5346 conditions per place. [2024-06-20 15:29:21,919 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 84 changer transitions 0/348 dead transitions. [2024-06-20 15:29:21,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 348 transitions, 5197 flow [2024-06-20 15:29:21,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:29:21,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-20 15:29:21,921 INFO L175 Difference]: Start difference. First operand has 244 places, 328 transitions, 4061 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:29:21,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 348 transitions, 5197 flow [2024-06-20 15:29:23,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 348 transitions, 5005 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:23,226 INFO L231 Difference]: Finished difference. Result has 245 places, 331 transitions, 4152 flow [2024-06-20 15:29:23,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3869, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4152, PETRI_PLACES=245, PETRI_TRANSITIONS=331} [2024-06-20 15:29:23,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-20 15:29:23,227 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 331 transitions, 4152 flow [2024-06-20 15:29:23,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:23,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:23,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:23,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:29:23,228 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:23,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash 161026214, now seen corresponding path program 3 times [2024-06-20 15:29:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:23,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20327736] [2024-06-20 15:29:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:23,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:23,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:23,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20327736] [2024-06-20 15:29:23,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20327736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:23,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:23,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:23,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323311403] [2024-06-20 15:29:23,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:23,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:23,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:23,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:23,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:23,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:23,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 331 transitions, 4152 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:23,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:23,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:23,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:24,455 INFO L124 PetriNetUnfolderBase]: 3584/6223 cut-off events. [2024-06-20 15:29:24,456 INFO L125 PetriNetUnfolderBase]: For 473250/473250 co-relation queries the response was YES. [2024-06-20 15:29:24,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39823 conditions, 6223 events. 3584/6223 cut-off events. For 473250/473250 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43320 event pairs, 1083 based on Foata normal form. 1/6220 useless extension candidates. Maximal degree in co-relation 39708. Up to 5431 conditions per place. [2024-06-20 15:29:24,521 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 78 changer transitions 0/355 dead transitions. [2024-06-20 15:29:24,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 355 transitions, 5083 flow [2024-06-20 15:29:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:24,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:29:24,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-20 15:29:24,522 INFO L175 Difference]: Start difference. First operand has 245 places, 331 transitions, 4152 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:29:24,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 355 transitions, 5083 flow [2024-06-20 15:29:25,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 355 transitions, 4838 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 15:29:25,624 INFO L231 Difference]: Finished difference. Result has 247 places, 334 transitions, 4104 flow [2024-06-20 15:29:25,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3907, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4104, PETRI_PLACES=247, PETRI_TRANSITIONS=334} [2024-06-20 15:29:25,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-20 15:29:25,625 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 334 transitions, 4104 flow [2024-06-20 15:29:25,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:25,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:25,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:25,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:29:25,625 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:25,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:25,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1120228062, now seen corresponding path program 4 times [2024-06-20 15:29:25,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:25,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666013308] [2024-06-20 15:29:25,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:25,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:25,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:25,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666013308] [2024-06-20 15:29:25,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666013308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:25,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:25,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:25,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648116035] [2024-06-20 15:29:25,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:25,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:25,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:25,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:25,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:25,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:25,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 334 transitions, 4104 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:25,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:25,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:25,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:26,606 INFO L124 PetriNetUnfolderBase]: 3581/6219 cut-off events. [2024-06-20 15:29:26,607 INFO L125 PetriNetUnfolderBase]: For 476342/476342 co-relation queries the response was YES. [2024-06-20 15:29:26,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39291 conditions, 6219 events. 3581/6219 cut-off events. For 476342/476342 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43341 event pairs, 1076 based on Foata normal form. 1/6216 useless extension candidates. Maximal degree in co-relation 39175. Up to 5429 conditions per place. [2024-06-20 15:29:26,674 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 269 selfloop transitions, 80 changer transitions 0/358 dead transitions. [2024-06-20 15:29:26,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 358 transitions, 5172 flow [2024-06-20 15:29:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:29:26,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:29:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-20 15:29:26,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-06-20 15:29:26,675 INFO L175 Difference]: Start difference. First operand has 247 places, 334 transitions, 4104 flow. Second operand 9 states and 227 transitions. [2024-06-20 15:29:26,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 358 transitions, 5172 flow [2024-06-20 15:29:27,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 358 transitions, 5063 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:29:27,915 INFO L231 Difference]: Finished difference. Result has 252 places, 334 transitions, 4161 flow [2024-06-20 15:29:27,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3995, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4161, PETRI_PLACES=252, PETRI_TRANSITIONS=334} [2024-06-20 15:29:27,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-20 15:29:27,915 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 334 transitions, 4161 flow [2024-06-20 15:29:27,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:27,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:27,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:27,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:29:27,916 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:27,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:27,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2124365594, now seen corresponding path program 5 times [2024-06-20 15:29:27,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:27,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675494651] [2024-06-20 15:29:27,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:27,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:28,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:28,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675494651] [2024-06-20 15:29:28,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675494651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:28,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:28,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:28,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577281927] [2024-06-20 15:29:28,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:28,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:28,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:28,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:28,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:28,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:28,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 334 transitions, 4161 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:28,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:28,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:28,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:29,002 INFO L124 PetriNetUnfolderBase]: 3573/6206 cut-off events. [2024-06-20 15:29:29,002 INFO L125 PetriNetUnfolderBase]: For 485321/485321 co-relation queries the response was YES. [2024-06-20 15:29:29,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39242 conditions, 6206 events. 3573/6206 cut-off events. For 485321/485321 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 43204 event pairs, 1076 based on Foata normal form. 2/6204 useless extension candidates. Maximal degree in co-relation 39124. Up to 5421 conditions per place. [2024-06-20 15:29:29,060 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 266 selfloop transitions, 77 changer transitions 0/352 dead transitions. [2024-06-20 15:29:29,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 352 transitions, 5049 flow [2024-06-20 15:29:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:29,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:29:29,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:29:29,062 INFO L175 Difference]: Start difference. First operand has 252 places, 334 transitions, 4161 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:29:29,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 352 transitions, 5049 flow [2024-06-20 15:29:30,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 352 transitions, 4815 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 15:29:30,086 INFO L231 Difference]: Finished difference. Result has 250 places, 334 transitions, 4089 flow [2024-06-20 15:29:30,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3927, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4089, PETRI_PLACES=250, PETRI_TRANSITIONS=334} [2024-06-20 15:29:30,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-20 15:29:30,087 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 334 transitions, 4089 flow [2024-06-20 15:29:30,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:30,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:30,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:30,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:29:30,096 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:30,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:30,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1947503984, now seen corresponding path program 6 times [2024-06-20 15:29:30,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:30,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327000075] [2024-06-20 15:29:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:30,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:30,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:30,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327000075] [2024-06-20 15:29:30,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327000075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:30,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:30,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:29:30,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996175088] [2024-06-20 15:29:30,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:30,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:29:30,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:30,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:29:30,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:29:30,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:30,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 334 transitions, 4089 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:29:30,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:30,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:30,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:30,998 INFO L124 PetriNetUnfolderBase]: 3583/6200 cut-off events. [2024-06-20 15:29:30,999 INFO L125 PetriNetUnfolderBase]: For 496963/496963 co-relation queries the response was YES. [2024-06-20 15:29:31,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39421 conditions, 6200 events. 3583/6200 cut-off events. For 496963/496963 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43228 event pairs, 1105 based on Foata normal form. 2/6184 useless extension candidates. Maximal degree in co-relation 39303. Up to 5431 conditions per place. [2024-06-20 15:29:31,063 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 84 changer transitions 0/349 dead transitions. [2024-06-20 15:29:31,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 349 transitions, 5008 flow [2024-06-20 15:29:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:29:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:29:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:29:31,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-20 15:29:31,065 INFO L175 Difference]: Start difference. First operand has 250 places, 334 transitions, 4089 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:29:31,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 349 transitions, 5008 flow [2024-06-20 15:29:32,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 349 transitions, 4848 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:32,212 INFO L231 Difference]: Finished difference. Result has 250 places, 338 transitions, 4157 flow [2024-06-20 15:29:32,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3935, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4157, PETRI_PLACES=250, PETRI_TRANSITIONS=338} [2024-06-20 15:29:32,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-20 15:29:32,213 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 338 transitions, 4157 flow [2024-06-20 15:29:32,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:29:32,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:32,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:32,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:29:32,213 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:32,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash -298911146, now seen corresponding path program 7 times [2024-06-20 15:29:32,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:32,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296822023] [2024-06-20 15:29:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:32,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:32,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296822023] [2024-06-20 15:29:32,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296822023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:32,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:32,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:29:32,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137514016] [2024-06-20 15:29:32,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:32,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:29:32,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:32,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:29:32,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:29:32,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:32,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 338 transitions, 4157 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:29:32,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:32,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:32,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:33,172 INFO L124 PetriNetUnfolderBase]: 3575/6188 cut-off events. [2024-06-20 15:29:33,172 INFO L125 PetriNetUnfolderBase]: For 501744/501744 co-relation queries the response was YES. [2024-06-20 15:29:33,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39328 conditions, 6188 events. 3575/6188 cut-off events. For 501744/501744 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43075 event pairs, 1105 based on Foata normal form. 2/6172 useless extension candidates. Maximal degree in co-relation 39209. Up to 5423 conditions per place. [2024-06-20 15:29:33,227 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 80 changer transitions 0/348 dead transitions. [2024-06-20 15:29:33,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 348 transitions, 4859 flow [2024-06-20 15:29:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:29:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:29:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:29:33,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:29:33,228 INFO L175 Difference]: Start difference. First operand has 250 places, 338 transitions, 4157 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:29:33,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 348 transitions, 4859 flow [2024-06-20 15:29:34,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 348 transitions, 4564 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:34,290 INFO L231 Difference]: Finished difference. Result has 250 places, 338 transitions, 4031 flow [2024-06-20 15:29:34,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3862, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4031, PETRI_PLACES=250, PETRI_TRANSITIONS=338} [2024-06-20 15:29:34,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-20 15:29:34,290 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 338 transitions, 4031 flow [2024-06-20 15:29:34,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:29:34,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:34,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:34,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:29:34,291 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:34,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash -869801354, now seen corresponding path program 1 times [2024-06-20 15:29:34,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:34,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920742223] [2024-06-20 15:29:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:34,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:34,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:34,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920742223] [2024-06-20 15:29:34,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920742223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:34,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:34,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:34,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666477589] [2024-06-20 15:29:34,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:34,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:34,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:34,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:34,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:34,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:34,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 338 transitions, 4031 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:34,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:34,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:34,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:35,277 INFO L124 PetriNetUnfolderBase]: 3596/6248 cut-off events. [2024-06-20 15:29:35,278 INFO L125 PetriNetUnfolderBase]: For 520955/520955 co-relation queries the response was YES. [2024-06-20 15:29:35,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39988 conditions, 6248 events. 3596/6248 cut-off events. For 520955/520955 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43512 event pairs, 967 based on Foata normal form. 2/6248 useless extension candidates. Maximal degree in co-relation 39868. Up to 5636 conditions per place. [2024-06-20 15:29:35,349 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 330 selfloop transitions, 27 changer transitions 0/366 dead transitions. [2024-06-20 15:29:35,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 366 transitions, 5119 flow [2024-06-20 15:29:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:35,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:29:35,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-20 15:29:35,350 INFO L175 Difference]: Start difference. First operand has 250 places, 338 transitions, 4031 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:29:35,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 366 transitions, 5119 flow [2024-06-20 15:29:36,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 366 transitions, 4925 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:36,894 INFO L231 Difference]: Finished difference. Result has 252 places, 342 transitions, 4052 flow [2024-06-20 15:29:36,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4052, PETRI_PLACES=252, PETRI_TRANSITIONS=342} [2024-06-20 15:29:36,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-20 15:29:36,895 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 342 transitions, 4052 flow [2024-06-20 15:29:36,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:36,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:36,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:36,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:29:36,895 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:36,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash 256529304, now seen corresponding path program 2 times [2024-06-20 15:29:36,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:36,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558627557] [2024-06-20 15:29:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:36,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:37,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:37,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558627557] [2024-06-20 15:29:37,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558627557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:37,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:37,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:37,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695390971] [2024-06-20 15:29:37,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:37,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:37,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:37,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:37,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:37,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:37,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 342 transitions, 4052 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:37,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:37,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:37,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:38,009 INFO L124 PetriNetUnfolderBase]: 3591/6241 cut-off events. [2024-06-20 15:29:38,009 INFO L125 PetriNetUnfolderBase]: For 526082/526082 co-relation queries the response was YES. [2024-06-20 15:29:38,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39757 conditions, 6241 events. 3591/6241 cut-off events. For 526082/526082 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43453 event pairs, 1050 based on Foata normal form. 2/6241 useless extension candidates. Maximal degree in co-relation 39636. Up to 5664 conditions per place. [2024-06-20 15:29:38,064 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 329 selfloop transitions, 22 changer transitions 0/360 dead transitions. [2024-06-20 15:29:38,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 360 transitions, 4798 flow [2024-06-20 15:29:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:38,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:29:38,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-20 15:29:38,066 INFO L175 Difference]: Start difference. First operand has 252 places, 342 transitions, 4052 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:29:38,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 360 transitions, 4798 flow [2024-06-20 15:29:39,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 360 transitions, 4635 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-20 15:29:39,430 INFO L231 Difference]: Finished difference. Result has 255 places, 342 transitions, 3938 flow [2024-06-20 15:29:39,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3938, PETRI_PLACES=255, PETRI_TRANSITIONS=342} [2024-06-20 15:29:39,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-20 15:29:39,431 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 342 transitions, 3938 flow [2024-06-20 15:29:39,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:39,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:39,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:39,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:29:39,432 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:39,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:39,432 INFO L85 PathProgramCache]: Analyzing trace with hash 392142586, now seen corresponding path program 3 times [2024-06-20 15:29:39,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:39,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274771262] [2024-06-20 15:29:39,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:39,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:39,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:39,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274771262] [2024-06-20 15:29:39,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274771262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:39,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:39,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:29:39,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168393439] [2024-06-20 15:29:39,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:39,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:29:39,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:29:39,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:29:39,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:39,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 342 transitions, 3938 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:29:39,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:39,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:39,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:40,434 INFO L124 PetriNetUnfolderBase]: 3586/6227 cut-off events. [2024-06-20 15:29:40,434 INFO L125 PetriNetUnfolderBase]: For 531044/531044 co-relation queries the response was YES. [2024-06-20 15:29:40,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39429 conditions, 6227 events. 3586/6227 cut-off events. For 531044/531044 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43358 event pairs, 1056 based on Foata normal form. 2/6222 useless extension candidates. Maximal degree in co-relation 39306. Up to 5657 conditions per place. [2024-06-20 15:29:40,510 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 324 selfloop transitions, 22 changer transitions 0/355 dead transitions. [2024-06-20 15:29:40,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 355 transitions, 4736 flow [2024-06-20 15:29:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:29:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:29:40,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:29:40,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-20 15:29:40,512 INFO L175 Difference]: Start difference. First operand has 255 places, 342 transitions, 3938 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:29:40,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 355 transitions, 4736 flow [2024-06-20 15:29:42,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 355 transitions, 4682 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:42,012 INFO L231 Difference]: Finished difference. Result has 255 places, 344 transitions, 4017 flow [2024-06-20 15:29:42,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3884, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4017, PETRI_PLACES=255, PETRI_TRANSITIONS=344} [2024-06-20 15:29:42,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-20 15:29:42,012 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 344 transitions, 4017 flow [2024-06-20 15:29:42,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 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) [2024-06-20 15:29:42,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:42,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:42,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:29:42,013 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:42,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:42,013 INFO L85 PathProgramCache]: Analyzing trace with hash -640411164, now seen corresponding path program 1 times [2024-06-20 15:29:42,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:42,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85210600] [2024-06-20 15:29:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:42,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:42,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:42,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85210600] [2024-06-20 15:29:42,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85210600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:42,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:42,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:29:42,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134539137] [2024-06-20 15:29:42,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:42,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:29:42,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:42,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:29:42,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:29:42,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:42,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 344 transitions, 4017 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:42,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:42,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:42,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:43,087 INFO L124 PetriNetUnfolderBase]: 3591/6232 cut-off events. [2024-06-20 15:29:43,087 INFO L125 PetriNetUnfolderBase]: For 539044/539044 co-relation queries the response was YES. [2024-06-20 15:29:43,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39665 conditions, 6232 events. 3591/6232 cut-off events. For 539044/539044 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43435 event pairs, 1060 based on Foata normal form. 1/6227 useless extension candidates. Maximal degree in co-relation 39541. Up to 5543 conditions per place. [2024-06-20 15:29:43,147 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 58 changer transitions 0/361 dead transitions. [2024-06-20 15:29:43,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 361 transitions, 4974 flow [2024-06-20 15:29:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:29:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:29:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:29:43,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-20 15:29:43,148 INFO L175 Difference]: Start difference. First operand has 255 places, 344 transitions, 4017 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:29:43,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 361 transitions, 4974 flow [2024-06-20 15:29:44,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 361 transitions, 4857 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 15:29:44,561 INFO L231 Difference]: Finished difference. Result has 257 places, 347 transitions, 4078 flow [2024-06-20 15:29:44,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3900, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4078, PETRI_PLACES=257, PETRI_TRANSITIONS=347} [2024-06-20 15:29:44,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-20 15:29:44,562 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 347 transitions, 4078 flow [2024-06-20 15:29:44,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:44,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:44,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:44,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:29:44,563 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:44,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:44,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1722790722, now seen corresponding path program 2 times [2024-06-20 15:29:44,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:44,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110220490] [2024-06-20 15:29:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:44,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:44,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:44,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110220490] [2024-06-20 15:29:44,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110220490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:44,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:44,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:29:44,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482640491] [2024-06-20 15:29:44,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:44,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:29:44,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:29:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:29:44,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:44,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 347 transitions, 4078 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:44,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:44,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:44,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:45,555 INFO L124 PetriNetUnfolderBase]: 3588/6228 cut-off events. [2024-06-20 15:29:45,556 INFO L125 PetriNetUnfolderBase]: For 546408/546408 co-relation queries the response was YES. [2024-06-20 15:29:45,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39700 conditions, 6228 events. 3588/6228 cut-off events. For 546408/546408 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43333 event pairs, 1060 based on Foata normal form. 1/6223 useless extension candidates. Maximal degree in co-relation 39575. Up to 5540 conditions per place. [2024-06-20 15:29:45,632 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 295 selfloop transitions, 56 changer transitions 0/360 dead transitions. [2024-06-20 15:29:45,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 360 transitions, 4812 flow [2024-06-20 15:29:45,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:29:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:29:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:29:45,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:29:45,634 INFO L175 Difference]: Start difference. First operand has 257 places, 347 transitions, 4078 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:29:45,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 360 transitions, 4812 flow [2024-06-20 15:29:47,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 360 transitions, 4687 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:29:47,105 INFO L231 Difference]: Finished difference. Result has 258 places, 347 transitions, 4076 flow [2024-06-20 15:29:47,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4076, PETRI_PLACES=258, PETRI_TRANSITIONS=347} [2024-06-20 15:29:47,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-20 15:29:47,106 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 347 transitions, 4076 flow [2024-06-20 15:29:47,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:47,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:47,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:47,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:29:47,107 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:47,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash 403318402, now seen corresponding path program 3 times [2024-06-20 15:29:47,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:47,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888242252] [2024-06-20 15:29:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:47,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:47,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:47,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888242252] [2024-06-20 15:29:47,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888242252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:47,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:47,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:47,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248215120] [2024-06-20 15:29:47,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:47,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:47,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:47,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:47,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:47,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:47,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 347 transitions, 4076 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:47,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:47,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:47,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:48,199 INFO L124 PetriNetUnfolderBase]: 3593/6237 cut-off events. [2024-06-20 15:29:48,199 INFO L125 PetriNetUnfolderBase]: For 546603/546603 co-relation queries the response was YES. [2024-06-20 15:29:48,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39769 conditions, 6237 events. 3593/6237 cut-off events. For 546603/546603 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43469 event pairs, 1086 based on Foata normal form. 1/6232 useless extension candidates. Maximal degree in co-relation 39644. Up to 5443 conditions per place. [2024-06-20 15:29:48,258 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 272 selfloop transitions, 88 changer transitions 0/369 dead transitions. [2024-06-20 15:29:48,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 369 transitions, 5235 flow [2024-06-20 15:29:48,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:29:48,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-20 15:29:48,259 INFO L175 Difference]: Start difference. First operand has 258 places, 347 transitions, 4076 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:29:48,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 369 transitions, 5235 flow [2024-06-20 15:29:49,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 369 transitions, 5080 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:49,510 INFO L231 Difference]: Finished difference. Result has 259 places, 350 transitions, 4157 flow [2024-06-20 15:29:49,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4157, PETRI_PLACES=259, PETRI_TRANSITIONS=350} [2024-06-20 15:29:49,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-20 15:29:49,511 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 350 transitions, 4157 flow [2024-06-20 15:29:49,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:49,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:49,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:49,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:29:49,512 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:49,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:49,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1004114152, now seen corresponding path program 4 times [2024-06-20 15:29:49,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:49,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533351489] [2024-06-20 15:29:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:49,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:49,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:49,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533351489] [2024-06-20 15:29:49,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533351489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:49,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:49,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:29:49,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684041466] [2024-06-20 15:29:49,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:49,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:29:49,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:49,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:29:49,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:29:49,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:49,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 350 transitions, 4157 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:49,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:49,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:49,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:50,467 INFO L124 PetriNetUnfolderBase]: 3598/6246 cut-off events. [2024-06-20 15:29:50,468 INFO L125 PetriNetUnfolderBase]: For 546993/546993 co-relation queries the response was YES. [2024-06-20 15:29:50,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39898 conditions, 6246 events. 3598/6246 cut-off events. For 546993/546993 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 43580 event pairs, 1089 based on Foata normal form. 1/6241 useless extension candidates. Maximal degree in co-relation 39773. Up to 5449 conditions per place. [2024-06-20 15:29:50,538 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 271 selfloop transitions, 91 changer transitions 0/371 dead transitions. [2024-06-20 15:29:50,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 371 transitions, 5324 flow [2024-06-20 15:29:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:29:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:29:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-20 15:29:50,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-20 15:29:50,539 INFO L175 Difference]: Start difference. First operand has 259 places, 350 transitions, 4157 flow. Second operand 6 states and 160 transitions. [2024-06-20 15:29:50,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 371 transitions, 5324 flow [2024-06-20 15:29:51,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 371 transitions, 5099 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:51,734 INFO L231 Difference]: Finished difference. Result has 259 places, 353 transitions, 4176 flow [2024-06-20 15:29:51,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4176, PETRI_PLACES=259, PETRI_TRANSITIONS=353} [2024-06-20 15:29:51,734 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-20 15:29:51,735 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 353 transitions, 4176 flow [2024-06-20 15:29:51,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:51,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:51,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:51,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:29:51,735 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:51,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:51,735 INFO L85 PathProgramCache]: Analyzing trace with hash -308665636, now seen corresponding path program 5 times [2024-06-20 15:29:51,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:51,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896482725] [2024-06-20 15:29:51,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:51,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:51,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:51,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896482725] [2024-06-20 15:29:51,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896482725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:51,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:51,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:29:51,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568775682] [2024-06-20 15:29:51,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:51,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:29:51,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:51,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:29:51,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:29:51,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:51,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 353 transitions, 4176 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:51,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:51,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:51,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:52,776 INFO L124 PetriNetUnfolderBase]: 3611/6257 cut-off events. [2024-06-20 15:29:52,776 INFO L125 PetriNetUnfolderBase]: For 563815/563815 co-relation queries the response was YES. [2024-06-20 15:29:52,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40224 conditions, 6257 events. 3611/6257 cut-off events. For 563815/563815 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 43689 event pairs, 1115 based on Foata normal form. 1/6244 useless extension candidates. Maximal degree in co-relation 40098. Up to 5464 conditions per place. [2024-06-20 15:29:52,837 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 96 changer transitions 0/371 dead transitions. [2024-06-20 15:29:52,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 371 transitions, 5376 flow [2024-06-20 15:29:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:29:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:29:52,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:29:52,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:29:52,838 INFO L175 Difference]: Start difference. First operand has 259 places, 353 transitions, 4176 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:29:52,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 371 transitions, 5376 flow [2024-06-20 15:29:54,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 371 transitions, 5184 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 15:29:54,409 INFO L231 Difference]: Finished difference. Result has 261 places, 359 transitions, 4282 flow [2024-06-20 15:29:54,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4282, PETRI_PLACES=261, PETRI_TRANSITIONS=359} [2024-06-20 15:29:54,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-20 15:29:54,410 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 359 transitions, 4282 flow [2024-06-20 15:29:54,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:54,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:54,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:54,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:29:54,411 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:54,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:54,411 INFO L85 PathProgramCache]: Analyzing trace with hash -565569766, now seen corresponding path program 6 times [2024-06-20 15:29:54,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:54,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619992245] [2024-06-20 15:29:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:54,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:54,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:54,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619992245] [2024-06-20 15:29:54,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619992245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:54,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:54,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:29:54,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417027272] [2024-06-20 15:29:54,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:54,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:29:54,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:29:54,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:29:54,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:54,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 359 transitions, 4282 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:54,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:54,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:54,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:55,368 INFO L124 PetriNetUnfolderBase]: 3608/6264 cut-off events. [2024-06-20 15:29:55,368 INFO L125 PetriNetUnfolderBase]: For 571316/571316 co-relation queries the response was YES. [2024-06-20 15:29:55,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40257 conditions, 6264 events. 3608/6264 cut-off events. For 571316/571316 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 43663 event pairs, 1089 based on Foata normal form. 1/6259 useless extension candidates. Maximal degree in co-relation 40130. Up to 5461 conditions per place. [2024-06-20 15:29:55,438 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 101 changer transitions 0/374 dead transitions. [2024-06-20 15:29:55,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 374 transitions, 5400 flow [2024-06-20 15:29:55,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:29:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:29:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:29:55,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-20 15:29:55,440 INFO L175 Difference]: Start difference. First operand has 261 places, 359 transitions, 4282 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:29:55,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 374 transitions, 5400 flow [2024-06-20 15:29:57,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 374 transitions, 5186 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:29:57,015 INFO L231 Difference]: Finished difference. Result has 263 places, 359 transitions, 4276 flow [2024-06-20 15:29:57,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4276, PETRI_PLACES=263, PETRI_TRANSITIONS=359} [2024-06-20 15:29:57,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-20 15:29:57,015 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 359 transitions, 4276 flow [2024-06-20 15:29:57,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:57,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:57,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:57,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:29:57,016 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:57,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:57,016 INFO L85 PathProgramCache]: Analyzing trace with hash -313427236, now seen corresponding path program 7 times [2024-06-20 15:29:57,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:57,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735351089] [2024-06-20 15:29:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:57,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:57,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:57,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735351089] [2024-06-20 15:29:57,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735351089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:57,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:57,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:57,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525891999] [2024-06-20 15:29:57,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:57,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:57,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:57,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:29:57,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:29:57,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 359 transitions, 4276 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:57,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:57,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:29:57,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:58,105 INFO L124 PetriNetUnfolderBase]: 3613/6249 cut-off events. [2024-06-20 15:29:58,105 INFO L125 PetriNetUnfolderBase]: For 584496/584496 co-relation queries the response was YES. [2024-06-20 15:29:58,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40392 conditions, 6249 events. 3613/6249 cut-off events. For 584496/584496 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43535 event pairs, 1108 based on Foata normal form. 1/6236 useless extension candidates. Maximal degree in co-relation 40266. Up to 5467 conditions per place. [2024-06-20 15:29:58,170 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 104 changer transitions 0/374 dead transitions. [2024-06-20 15:29:58,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 374 transitions, 5264 flow [2024-06-20 15:29:58,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:29:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:29:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:29:58,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-20 15:29:58,171 INFO L175 Difference]: Start difference. First operand has 263 places, 359 transitions, 4276 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:29:58,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 374 transitions, 5264 flow [2024-06-20 15:29:59,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 374 transitions, 4889 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:29:59,914 INFO L231 Difference]: Finished difference. Result has 263 places, 362 transitions, 4167 flow [2024-06-20 15:29:59,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4167, PETRI_PLACES=263, PETRI_TRANSITIONS=362} [2024-06-20 15:29:59,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-20 15:29:59,915 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 362 transitions, 4167 flow [2024-06-20 15:29:59,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:59,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:59,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:59,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:29:59,915 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:29:59,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:59,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2100307012, now seen corresponding path program 8 times [2024-06-20 15:29:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:59,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242445886] [2024-06-20 15:29:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:59,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:59,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:59,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242445886] [2024-06-20 15:29:59,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242445886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:59,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:59,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:29:59,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718542657] [2024-06-20 15:29:59,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:59,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:29:59,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:59,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:29:59,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:00,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:00,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 362 transitions, 4167 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:00,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:00,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:00,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:00,903 INFO L124 PetriNetUnfolderBase]: 3610/6249 cut-off events. [2024-06-20 15:30:00,903 INFO L125 PetriNetUnfolderBase]: For 590582/590582 co-relation queries the response was YES. [2024-06-20 15:30:00,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40312 conditions, 6249 events. 3610/6249 cut-off events. For 590582/590582 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 43578 event pairs, 1103 based on Foata normal form. 1/6236 useless extension candidates. Maximal degree in co-relation 40186. Up to 5464 conditions per place. [2024-06-20 15:30:00,977 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 101 changer transitions 0/376 dead transitions. [2024-06-20 15:30:00,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 376 transitions, 5113 flow [2024-06-20 15:30:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:30:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:30:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:30:00,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-20 15:30:00,978 INFO L175 Difference]: Start difference. First operand has 263 places, 362 transitions, 4167 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:30:00,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 376 transitions, 5113 flow [2024-06-20 15:30:02,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 376 transitions, 4956 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:30:02,417 INFO L231 Difference]: Finished difference. Result has 268 places, 362 transitions, 4218 flow [2024-06-20 15:30:02,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4218, PETRI_PLACES=268, PETRI_TRANSITIONS=362} [2024-06-20 15:30:02,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-20 15:30:02,418 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 362 transitions, 4218 flow [2024-06-20 15:30:02,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:02,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:02,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:02,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:30:02,419 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:02,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:02,419 INFO L85 PathProgramCache]: Analyzing trace with hash -386748126, now seen corresponding path program 9 times [2024-06-20 15:30:02,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:02,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177371403] [2024-06-20 15:30:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:02,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:02,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:02,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177371403] [2024-06-20 15:30:02,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177371403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:02,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:02,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:02,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386737204] [2024-06-20 15:30:02,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:02,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:02,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:02,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:02,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:02,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:02,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 362 transitions, 4218 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:02,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:02,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:02,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:03,425 INFO L124 PetriNetUnfolderBase]: 3607/6245 cut-off events. [2024-06-20 15:30:03,425 INFO L125 PetriNetUnfolderBase]: For 599720/599720 co-relation queries the response was YES. [2024-06-20 15:30:03,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40342 conditions, 6245 events. 3607/6245 cut-off events. For 599720/599720 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 43535 event pairs, 1103 based on Foata normal form. 1/6232 useless extension candidates. Maximal degree in co-relation 40214. Up to 5461 conditions per place. [2024-06-20 15:30:03,492 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 99 changer transitions 0/373 dead transitions. [2024-06-20 15:30:03,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 373 transitions, 4972 flow [2024-06-20 15:30:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:30:03,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-20 15:30:03,494 INFO L175 Difference]: Start difference. First operand has 268 places, 362 transitions, 4218 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:30:03,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 373 transitions, 4972 flow [2024-06-20 15:30:05,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 373 transitions, 4572 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-20 15:30:05,492 INFO L231 Difference]: Finished difference. Result has 264 places, 362 transitions, 4023 flow [2024-06-20 15:30:05,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3818, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4023, PETRI_PLACES=264, PETRI_TRANSITIONS=362} [2024-06-20 15:30:05,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-20 15:30:05,492 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 362 transitions, 4023 flow [2024-06-20 15:30:05,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:05,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:05,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:05,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:30:05,493 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:05,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:05,493 INFO L85 PathProgramCache]: Analyzing trace with hash 887014298, now seen corresponding path program 1 times [2024-06-20 15:30:05,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:05,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716573107] [2024-06-20 15:30:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:05,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:05,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:05,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716573107] [2024-06-20 15:30:05,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716573107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:05,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:05,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:05,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987368141] [2024-06-20 15:30:05,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:05,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:05,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:05,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:05,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:05,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:05,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 362 transitions, 4023 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:05,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:05,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:05,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:06,747 INFO L124 PetriNetUnfolderBase]: 3739/6468 cut-off events. [2024-06-20 15:30:06,748 INFO L125 PetriNetUnfolderBase]: For 727256/727256 co-relation queries the response was YES. [2024-06-20 15:30:06,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43183 conditions, 6468 events. 3739/6468 cut-off events. For 727256/727256 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 45308 event pairs, 1004 based on Foata normal form. 12/6474 useless extension candidates. Maximal degree in co-relation 43056. Up to 5319 conditions per place. [2024-06-20 15:30:06,854 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 316 selfloop transitions, 68 changer transitions 0/393 dead transitions. [2024-06-20 15:30:06,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 393 transitions, 5191 flow [2024-06-20 15:30:06,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:06,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 15:30:06,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-20 15:30:06,856 INFO L175 Difference]: Start difference. First operand has 264 places, 362 transitions, 4023 flow. Second operand 7 states and 185 transitions. [2024-06-20 15:30:06,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 393 transitions, 5191 flow [2024-06-20 15:30:09,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 393 transitions, 4993 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:30:09,176 INFO L231 Difference]: Finished difference. Result has 266 places, 366 transitions, 4119 flow [2024-06-20 15:30:09,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4119, PETRI_PLACES=266, PETRI_TRANSITIONS=366} [2024-06-20 15:30:09,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-20 15:30:09,176 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 366 transitions, 4119 flow [2024-06-20 15:30:09,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:09,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:09,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:09,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:30:09,177 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:09,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:09,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1722793698, now seen corresponding path program 2 times [2024-06-20 15:30:09,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:09,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006132732] [2024-06-20 15:30:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:09,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:09,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:09,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006132732] [2024-06-20 15:30:09,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006132732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:09,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:09,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:09,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983125624] [2024-06-20 15:30:09,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:09,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:09,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:09,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:09,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:09,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:09,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 366 transitions, 4119 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:09,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:09,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:09,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:10,319 INFO L124 PetriNetUnfolderBase]: 3782/6564 cut-off events. [2024-06-20 15:30:10,319 INFO L125 PetriNetUnfolderBase]: For 750336/750336 co-relation queries the response was YES. [2024-06-20 15:30:10,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44068 conditions, 6564 events. 3782/6564 cut-off events. For 750336/750336 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 46368 event pairs, 1106 based on Foata normal form. 16/6574 useless extension candidates. Maximal degree in co-relation 43939. Up to 5752 conditions per place. [2024-06-20 15:30:10,390 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 313 selfloop transitions, 64 changer transitions 0/386 dead transitions. [2024-06-20 15:30:10,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 386 transitions, 4988 flow [2024-06-20 15:30:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:30:10,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:30:10,392 INFO L175 Difference]: Start difference. First operand has 266 places, 366 transitions, 4119 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:30:10,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 386 transitions, 4988 flow [2024-06-20 15:30:12,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 386 transitions, 4881 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 15:30:12,473 INFO L231 Difference]: Finished difference. Result has 270 places, 368 transitions, 4214 flow [2024-06-20 15:30:12,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4214, PETRI_PLACES=270, PETRI_TRANSITIONS=368} [2024-06-20 15:30:12,473 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-20 15:30:12,473 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 368 transitions, 4214 flow [2024-06-20 15:30:12,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:12,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:12,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:12,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:30:12,474 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:12,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:12,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1723149888, now seen corresponding path program 3 times [2024-06-20 15:30:12,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:12,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734898126] [2024-06-20 15:30:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:12,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734898126] [2024-06-20 15:30:12,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734898126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:12,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:12,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:12,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038842037] [2024-06-20 15:30:12,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:12,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:12,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:12,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:12,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 368 transitions, 4214 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:12,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:12,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:12,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:13,574 INFO L124 PetriNetUnfolderBase]: 3789/6583 cut-off events. [2024-06-20 15:30:13,574 INFO L125 PetriNetUnfolderBase]: For 725136/725136 co-relation queries the response was YES. [2024-06-20 15:30:13,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43872 conditions, 6583 events. 3789/6583 cut-off events. For 725136/725136 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 46516 event pairs, 1099 based on Foata normal form. 12/6589 useless extension candidates. Maximal degree in co-relation 43741. Up to 5677 conditions per place. [2024-06-20 15:30:13,654 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 313 selfloop transitions, 69 changer transitions 0/391 dead transitions. [2024-06-20 15:30:13,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 391 transitions, 5109 flow [2024-06-20 15:30:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:30:13,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:30:13,655 INFO L175 Difference]: Start difference. First operand has 270 places, 368 transitions, 4214 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:30:13,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 391 transitions, 5109 flow [2024-06-20 15:30:16,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 391 transitions, 4950 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:30:16,102 INFO L231 Difference]: Finished difference. Result has 272 places, 370 transitions, 4263 flow [2024-06-20 15:30:16,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4263, PETRI_PLACES=272, PETRI_TRANSITIONS=370} [2024-06-20 15:30:16,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-20 15:30:16,103 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 370 transitions, 4263 flow [2024-06-20 15:30:16,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:16,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:16,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:16,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:30:16,104 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:16,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:16,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1635696000, now seen corresponding path program 4 times [2024-06-20 15:30:16,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:16,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370481106] [2024-06-20 15:30:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:16,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:16,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:16,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370481106] [2024-06-20 15:30:16,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370481106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:16,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:16,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:16,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807378003] [2024-06-20 15:30:16,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:16,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:16,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:16,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:16,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:16,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 370 transitions, 4263 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:16,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:16,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:16,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:17,156 INFO L124 PetriNetUnfolderBase]: 3845/6650 cut-off events. [2024-06-20 15:30:17,156 INFO L125 PetriNetUnfolderBase]: For 760699/760699 co-relation queries the response was YES. [2024-06-20 15:30:17,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44511 conditions, 6650 events. 3845/6650 cut-off events. For 760699/760699 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 46953 event pairs, 1175 based on Foata normal form. 16/6652 useless extension candidates. Maximal degree in co-relation 44379. Up to 5771 conditions per place. [2024-06-20 15:30:17,231 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 101 changer transitions 0/387 dead transitions. [2024-06-20 15:30:17,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 387 transitions, 5129 flow [2024-06-20 15:30:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:30:17,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-20 15:30:17,232 INFO L175 Difference]: Start difference. First operand has 272 places, 370 transitions, 4263 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:30:17,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 387 transitions, 5129 flow [2024-06-20 15:30:19,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 387 transitions, 4944 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:30:19,879 INFO L231 Difference]: Finished difference. Result has 274 places, 372 transitions, 4352 flow [2024-06-20 15:30:19,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4078, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4352, PETRI_PLACES=274, PETRI_TRANSITIONS=372} [2024-06-20 15:30:19,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-20 15:30:19,880 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 372 transitions, 4352 flow [2024-06-20 15:30:19,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:19,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:19,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:19,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:30:19,881 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:19,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:19,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1635339810, now seen corresponding path program 5 times [2024-06-20 15:30:19,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:19,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782155063] [2024-06-20 15:30:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:19,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:19,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:19,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782155063] [2024-06-20 15:30:19,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782155063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:19,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:19,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:19,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428757576] [2024-06-20 15:30:19,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:19,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:19,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:19,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:19,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:20,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:20,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 372 transitions, 4352 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:20,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:20,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:20,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:21,005 INFO L124 PetriNetUnfolderBase]: 3964/6839 cut-off events. [2024-06-20 15:30:21,006 INFO L125 PetriNetUnfolderBase]: For 826611/826611 co-relation queries the response was YES. [2024-06-20 15:30:21,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47318 conditions, 6839 events. 3964/6839 cut-off events. For 826611/826611 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 48474 event pairs, 1196 based on Foata normal form. 12/6837 useless extension candidates. Maximal degree in co-relation 47185. Up to 5712 conditions per place. [2024-06-20 15:30:21,085 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 109 changer transitions 0/395 dead transitions. [2024-06-20 15:30:21,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 395 transitions, 5512 flow [2024-06-20 15:30:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:30:21,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-20 15:30:21,087 INFO L175 Difference]: Start difference. First operand has 274 places, 372 transitions, 4352 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:30:21,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 395 transitions, 5512 flow [2024-06-20 15:30:24,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 395 transitions, 5262 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 15:30:24,087 INFO L231 Difference]: Finished difference. Result has 276 places, 376 transitions, 4462 flow [2024-06-20 15:30:24,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4462, PETRI_PLACES=276, PETRI_TRANSITIONS=376} [2024-06-20 15:30:24,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-20 15:30:24,088 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 376 transitions, 4462 flow [2024-06-20 15:30:24,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:24,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:24,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:24,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:30:24,088 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:24,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:24,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2035193310, now seen corresponding path program 6 times [2024-06-20 15:30:24,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:24,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864040007] [2024-06-20 15:30:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:24,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:24,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864040007] [2024-06-20 15:30:24,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864040007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:24,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:24,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:24,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315607962] [2024-06-20 15:30:24,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:24,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:24,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:24,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:24,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:24,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:24,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 376 transitions, 4462 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:24,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:24,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:24,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:25,226 INFO L124 PetriNetUnfolderBase]: 3928/6787 cut-off events. [2024-06-20 15:30:25,227 INFO L125 PetriNetUnfolderBase]: For 783944/783944 co-relation queries the response was YES. [2024-06-20 15:30:25,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45322 conditions, 6787 events. 3928/6787 cut-off events. For 783944/783944 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 48131 event pairs, 1192 based on Foata normal form. 16/6789 useless extension candidates. Maximal degree in co-relation 45188. Up to 5904 conditions per place. [2024-06-20 15:30:25,322 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 106 changer transitions 0/391 dead transitions. [2024-06-20 15:30:25,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 391 transitions, 5274 flow [2024-06-20 15:30:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:30:25,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-20 15:30:25,324 INFO L175 Difference]: Start difference. First operand has 276 places, 376 transitions, 4462 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:30:25,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 391 transitions, 5274 flow [2024-06-20 15:30:28,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 391 transitions, 4955 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-20 15:30:28,548 INFO L231 Difference]: Finished difference. Result has 278 places, 376 transitions, 4361 flow [2024-06-20 15:30:28,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4361, PETRI_PLACES=278, PETRI_TRANSITIONS=376} [2024-06-20 15:30:28,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-20 15:30:28,549 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 376 transitions, 4361 flow [2024-06-20 15:30:28,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:28,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:28,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:28,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:30:28,550 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:28,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:28,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2049491006, now seen corresponding path program 1 times [2024-06-20 15:30:28,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:28,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923339703] [2024-06-20 15:30:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:28,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:28,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:28,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923339703] [2024-06-20 15:30:28,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923339703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:28,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:28,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:28,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378705544] [2024-06-20 15:30:28,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:28,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:28,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:28,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:28,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:28,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:28,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 376 transitions, 4361 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:28,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:28,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:28,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:29,759 INFO L124 PetriNetUnfolderBase]: 4014/6931 cut-off events. [2024-06-20 15:30:29,760 INFO L125 PetriNetUnfolderBase]: For 816443/816443 co-relation queries the response was YES. [2024-06-20 15:30:29,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46702 conditions, 6931 events. 4014/6931 cut-off events. For 816443/816443 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 49282 event pairs, 1195 based on Foata normal form. 12/6929 useless extension candidates. Maximal degree in co-relation 46568. Up to 5788 conditions per place. [2024-06-20 15:30:29,835 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 116 changer transitions 0/398 dead transitions. [2024-06-20 15:30:29,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 398 transitions, 5499 flow [2024-06-20 15:30:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:30:29,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-20 15:30:29,836 INFO L175 Difference]: Start difference. First operand has 278 places, 376 transitions, 4361 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:30:29,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 398 transitions, 5499 flow [2024-06-20 15:30:32,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 398 transitions, 5262 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:30:32,307 INFO L231 Difference]: Finished difference. Result has 279 places, 379 transitions, 4467 flow [2024-06-20 15:30:32,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4467, PETRI_PLACES=279, PETRI_TRANSITIONS=379} [2024-06-20 15:30:32,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-20 15:30:32,308 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 379 transitions, 4467 flow [2024-06-20 15:30:32,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:32,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:32,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:32,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:30:32,309 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:32,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:32,309 INFO L85 PathProgramCache]: Analyzing trace with hash -874916960, now seen corresponding path program 2 times [2024-06-20 15:30:32,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:32,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107706743] [2024-06-20 15:30:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:32,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:32,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:32,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107706743] [2024-06-20 15:30:32,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107706743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:32,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:32,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:32,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654671372] [2024-06-20 15:30:32,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:32,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:32,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:32,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:32,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:32,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:32,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 379 transitions, 4467 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:32,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:32,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:32,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:33,483 INFO L124 PetriNetUnfolderBase]: 4054/6995 cut-off events. [2024-06-20 15:30:33,483 INFO L125 PetriNetUnfolderBase]: For 836673/836673 co-relation queries the response was YES. [2024-06-20 15:30:33,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47494 conditions, 6995 events. 4054/6995 cut-off events. For 836673/836673 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 49811 event pairs, 1216 based on Foata normal form. 12/6993 useless extension candidates. Maximal degree in co-relation 47359. Up to 6030 conditions per place. [2024-06-20 15:30:33,569 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 284 selfloop transitions, 106 changer transitions 0/399 dead transitions. [2024-06-20 15:30:33,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 399 transitions, 5377 flow [2024-06-20 15:30:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:30:33,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-20 15:30:33,570 INFO L175 Difference]: Start difference. First operand has 279 places, 379 transitions, 4467 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:30:33,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 399 transitions, 5377 flow [2024-06-20 15:30:36,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 399 transitions, 5184 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 15:30:36,022 INFO L231 Difference]: Finished difference. Result has 283 places, 381 transitions, 4565 flow [2024-06-20 15:30:36,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4274, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4565, PETRI_PLACES=283, PETRI_TRANSITIONS=381} [2024-06-20 15:30:36,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-20 15:30:36,023 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 381 transitions, 4565 flow [2024-06-20 15:30:36,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:36,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:36,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:36,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:30:36,024 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:36,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash -361022210, now seen corresponding path program 3 times [2024-06-20 15:30:36,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:36,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205505703] [2024-06-20 15:30:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:36,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:36,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:36,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205505703] [2024-06-20 15:30:36,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205505703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:36,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:36,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:30:36,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075046608] [2024-06-20 15:30:36,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:36,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:30:36,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:36,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:30:36,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:30:36,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:36,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 381 transitions, 4565 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:36,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:36,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:36,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:37,276 INFO L124 PetriNetUnfolderBase]: 4107/7094 cut-off events. [2024-06-20 15:30:37,277 INFO L125 PetriNetUnfolderBase]: For 863670/863670 co-relation queries the response was YES. [2024-06-20 15:30:37,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48824 conditions, 7094 events. 4107/7094 cut-off events. For 863670/863670 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 50660 event pairs, 1222 based on Foata normal form. 12/7092 useless extension candidates. Maximal degree in co-relation 48687. Up to 5557 conditions per place. [2024-06-20 15:30:37,365 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 126 changer transitions 0/404 dead transitions. [2024-06-20 15:30:37,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 404 transitions, 5757 flow [2024-06-20 15:30:37,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:30:37,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-20 15:30:37,366 INFO L175 Difference]: Start difference. First operand has 283 places, 381 transitions, 4565 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:30:37,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 404 transitions, 5757 flow [2024-06-20 15:30:41,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 404 transitions, 5486 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 15:30:41,084 INFO L231 Difference]: Finished difference. Result has 285 places, 383 transitions, 4633 flow [2024-06-20 15:30:41,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4633, PETRI_PLACES=285, PETRI_TRANSITIONS=383} [2024-06-20 15:30:41,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-20 15:30:41,084 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 383 transitions, 4633 flow [2024-06-20 15:30:41,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:41,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:41,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:41,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:30:41,085 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:41,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:41,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1479748878, now seen corresponding path program 1 times [2024-06-20 15:30:41,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:41,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252886868] [2024-06-20 15:30:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:41,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:41,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:41,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252886868] [2024-06-20 15:30:41,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252886868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:41,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:41,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:30:41,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615339937] [2024-06-20 15:30:41,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:41,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:30:41,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:41,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:30:41,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:30:41,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:41,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 383 transitions, 4633 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:41,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:41,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:41,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:42,224 INFO L124 PetriNetUnfolderBase]: 4115/7134 cut-off events. [2024-06-20 15:30:42,224 INFO L125 PetriNetUnfolderBase]: For 827914/827914 co-relation queries the response was YES. [2024-06-20 15:30:42,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49104 conditions, 7134 events. 4115/7134 cut-off events. For 827914/827914 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 51047 event pairs, 1201 based on Foata normal form. 2/7132 useless extension candidates. Maximal degree in co-relation 48966. Up to 6406 conditions per place. [2024-06-20 15:30:42,315 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 354 selfloop transitions, 39 changer transitions 0/402 dead transitions. [2024-06-20 15:30:42,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 402 transitions, 5523 flow [2024-06-20 15:30:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:30:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:30:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:30:42,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:30:42,317 INFO L175 Difference]: Start difference. First operand has 285 places, 383 transitions, 4633 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:30:42,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 402 transitions, 5523 flow [2024-06-20 15:30:45,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 402 transitions, 5323 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 15:30:45,541 INFO L231 Difference]: Finished difference. Result has 287 places, 385 transitions, 4582 flow [2024-06-20 15:30:45,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4582, PETRI_PLACES=287, PETRI_TRANSITIONS=385} [2024-06-20 15:30:45,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-20 15:30:45,542 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 385 transitions, 4582 flow [2024-06-20 15:30:45,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:45,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:45,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:45,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:30:45,543 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:45,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash -474472802, now seen corresponding path program 2 times [2024-06-20 15:30:45,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:45,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727057288] [2024-06-20 15:30:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:45,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:45,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:45,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727057288] [2024-06-20 15:30:45,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727057288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:45,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:45,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:30:45,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827262285] [2024-06-20 15:30:45,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:45,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:30:45,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:45,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:30:45,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:30:45,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:45,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 385 transitions, 4582 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:45,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:45,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:45,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:46,650 INFO L124 PetriNetUnfolderBase]: 4136/7169 cut-off events. [2024-06-20 15:30:46,650 INFO L125 PetriNetUnfolderBase]: For 850832/850832 co-relation queries the response was YES. [2024-06-20 15:30:46,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49488 conditions, 7169 events. 4136/7169 cut-off events. For 850832/850832 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51355 event pairs, 1202 based on Foata normal form. 2/7167 useless extension candidates. Maximal degree in co-relation 49349. Up to 6392 conditions per place. [2024-06-20 15:30:46,736 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 351 selfloop transitions, 45 changer transitions 0/405 dead transitions. [2024-06-20 15:30:46,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 405 transitions, 5748 flow [2024-06-20 15:30:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:30:46,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:30:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:30:46,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:30:46,737 INFO L175 Difference]: Start difference. First operand has 287 places, 385 transitions, 4582 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:30:46,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 405 transitions, 5748 flow [2024-06-20 15:30:49,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 405 transitions, 5621 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 15:30:49,974 INFO L231 Difference]: Finished difference. Result has 289 places, 389 transitions, 4687 flow [2024-06-20 15:30:49,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4455, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4687, PETRI_PLACES=289, PETRI_TRANSITIONS=389} [2024-06-20 15:30:49,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-20 15:30:49,975 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 389 transitions, 4687 flow [2024-06-20 15:30:49,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:49,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:49,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:49,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:30:49,975 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:49,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:49,981 INFO L85 PathProgramCache]: Analyzing trace with hash 965290846, now seen corresponding path program 3 times [2024-06-20 15:30:49,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:49,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710478390] [2024-06-20 15:30:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:49,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:50,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:50,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710478390] [2024-06-20 15:30:50,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710478390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:50,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:50,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:30:50,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967341956] [2024-06-20 15:30:50,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:50,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:30:50,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:50,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:30:50,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:30:50,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:50,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 389 transitions, 4687 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:50,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:50,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:50,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:51,199 INFO L124 PetriNetUnfolderBase]: 4131/7161 cut-off events. [2024-06-20 15:30:51,199 INFO L125 PetriNetUnfolderBase]: For 856187/856187 co-relation queries the response was YES. [2024-06-20 15:30:51,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49336 conditions, 7161 events. 4131/7161 cut-off events. For 856187/856187 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 51273 event pairs, 1199 based on Foata normal form. 2/7156 useless extension candidates. Maximal degree in co-relation 49196. Up to 6430 conditions per place. [2024-06-20 15:30:51,294 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 360 selfloop transitions, 40 changer transitions 0/409 dead transitions. [2024-06-20 15:30:51,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 409 transitions, 5537 flow [2024-06-20 15:30:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:30:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:30:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 15:30:51,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-20 15:30:51,295 INFO L175 Difference]: Start difference. First operand has 289 places, 389 transitions, 4687 flow. Second operand 6 states and 159 transitions. [2024-06-20 15:30:51,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 409 transitions, 5537 flow [2024-06-20 15:30:54,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 409 transitions, 5395 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-20 15:30:54,828 INFO L231 Difference]: Finished difference. Result has 293 places, 389 transitions, 4630 flow [2024-06-20 15:30:54,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4630, PETRI_PLACES=293, PETRI_TRANSITIONS=389} [2024-06-20 15:30:54,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-20 15:30:54,828 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 389 transitions, 4630 flow [2024-06-20 15:30:54,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:54,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:54,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:54,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:30:54,829 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:54,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:54,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1250681054, now seen corresponding path program 4 times [2024-06-20 15:30:54,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:54,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326149328] [2024-06-20 15:30:54,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:54,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:54,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:54,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326149328] [2024-06-20 15:30:54,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326149328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:54,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:54,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:30:54,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75950841] [2024-06-20 15:30:54,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:54,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:30:54,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:54,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:30:54,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:30:54,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:30:54,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 389 transitions, 4630 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:54,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:54,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:30:54,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:55,995 INFO L124 PetriNetUnfolderBase]: 4139/7173 cut-off events. [2024-06-20 15:30:55,995 INFO L125 PetriNetUnfolderBase]: For 871315/871315 co-relation queries the response was YES. [2024-06-20 15:30:56,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49606 conditions, 7173 events. 4139/7173 cut-off events. For 871315/871315 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 51401 event pairs, 1195 based on Foata normal form. 2/7168 useless extension candidates. Maximal degree in co-relation 49464. Up to 6416 conditions per place. [2024-06-20 15:30:56,091 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 357 selfloop transitions, 43 changer transitions 0/409 dead transitions. [2024-06-20 15:30:56,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 409 transitions, 5544 flow [2024-06-20 15:30:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:30:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:30:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:30:56,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-20 15:30:56,092 INFO L175 Difference]: Start difference. First operand has 293 places, 389 transitions, 4630 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:30:56,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 409 transitions, 5544 flow [2024-06-20 15:31:00,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 409 transitions, 5441 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:31:00,006 INFO L231 Difference]: Finished difference. Result has 294 places, 391 transitions, 4692 flow [2024-06-20 15:31:00,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4692, PETRI_PLACES=294, PETRI_TRANSITIONS=391} [2024-06-20 15:31:00,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-20 15:31:00,007 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 391 transitions, 4692 flow [2024-06-20 15:31:00,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:00,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:00,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:00,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:31:00,007 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:00,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:00,007 INFO L85 PathProgramCache]: Analyzing trace with hash -449911168, now seen corresponding path program 5 times [2024-06-20 15:31:00,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:00,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628216061] [2024-06-20 15:31:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:00,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:00,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:00,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628216061] [2024-06-20 15:31:00,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628216061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:00,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:00,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:31:00,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302043484] [2024-06-20 15:31:00,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:00,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:31:00,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:00,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:31:00,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:31:00,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:31:00,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 391 transitions, 4692 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:00,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:00,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:31:00,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:01,170 INFO L124 PetriNetUnfolderBase]: 4147/7187 cut-off events. [2024-06-20 15:31:01,170 INFO L125 PetriNetUnfolderBase]: For 889813/889813 co-relation queries the response was YES. [2024-06-20 15:31:01,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49959 conditions, 7187 events. 4147/7187 cut-off events. For 889813/889813 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 51604 event pairs, 1181 based on Foata normal form. 2/7180 useless extension candidates. Maximal degree in co-relation 49816. Up to 6317 conditions per place. [2024-06-20 15:31:01,261 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 347 selfloop transitions, 52 changer transitions 0/408 dead transitions. [2024-06-20 15:31:01,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 408 transitions, 5847 flow [2024-06-20 15:31:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:31:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:31:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:31:01,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-20 15:31:01,263 INFO L175 Difference]: Start difference. First operand has 294 places, 391 transitions, 4692 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:31:01,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 408 transitions, 5847 flow [2024-06-20 15:31:04,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 408 transitions, 5704 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 15:31:04,730 INFO L231 Difference]: Finished difference. Result has 296 places, 394 transitions, 4775 flow [2024-06-20 15:31:04,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4775, PETRI_PLACES=296, PETRI_TRANSITIONS=394} [2024-06-20 15:31:04,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-20 15:31:04,731 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 394 transitions, 4775 flow [2024-06-20 15:31:04,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:04,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:04,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:04,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:31:04,731 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:04,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:04,732 INFO L85 PathProgramCache]: Analyzing trace with hash -470304464, now seen corresponding path program 6 times [2024-06-20 15:31:04,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:04,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486081136] [2024-06-20 15:31:04,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:04,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:04,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:04,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486081136] [2024-06-20 15:31:04,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486081136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:04,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:04,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:31:04,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796598635] [2024-06-20 15:31:04,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:04,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:31:04,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:31:04,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:31:04,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:31:04,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 394 transitions, 4775 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:04,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:04,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:31:04,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:05,909 INFO L124 PetriNetUnfolderBase]: 4142/7180 cut-off events. [2024-06-20 15:31:05,909 INFO L125 PetriNetUnfolderBase]: For 894397/894397 co-relation queries the response was YES. [2024-06-20 15:31:05,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49796 conditions, 7180 events. 4142/7180 cut-off events. For 894397/894397 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 51611 event pairs, 1181 based on Foata normal form. 2/7173 useless extension candidates. Maximal degree in co-relation 49652. Up to 6313 conditions per place. [2024-06-20 15:31:05,994 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 345 selfloop transitions, 53 changer transitions 0/407 dead transitions. [2024-06-20 15:31:05,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 407 transitions, 5601 flow [2024-06-20 15:31:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:31:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:31:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:31:05,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-20 15:31:05,995 INFO L175 Difference]: Start difference. First operand has 296 places, 394 transitions, 4775 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:31:05,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 407 transitions, 5601 flow [2024-06-20 15:31:09,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 407 transitions, 5400 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-20 15:31:09,169 INFO L231 Difference]: Finished difference. Result has 299 places, 394 transitions, 4685 flow [2024-06-20 15:31:09,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4574, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4685, PETRI_PLACES=299, PETRI_TRANSITIONS=394} [2024-06-20 15:31:09,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-20 15:31:09,169 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 394 transitions, 4685 flow [2024-06-20 15:31:09,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:09,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:09,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:09,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:31:09,170 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:09,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:09,170 INFO L85 PathProgramCache]: Analyzing trace with hash -883442012, now seen corresponding path program 1 times [2024-06-20 15:31:09,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:09,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597570050] [2024-06-20 15:31:09,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:09,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:09,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:09,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597570050] [2024-06-20 15:31:09,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597570050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:09,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:09,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:09,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859916846] [2024-06-20 15:31:09,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:09,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:09,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:09,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:09,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:09,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:31:09,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 394 transitions, 4685 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:09,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:09,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:31:09,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:10,474 INFO L124 PetriNetUnfolderBase]: 4340/7504 cut-off events. [2024-06-20 15:31:10,474 INFO L125 PetriNetUnfolderBase]: For 1119503/1119503 co-relation queries the response was YES. [2024-06-20 15:31:10,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55044 conditions, 7504 events. 4340/7504 cut-off events. For 1119503/1119503 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 54117 event pairs, 1059 based on Foata normal form. 12/7512 useless extension candidates. Maximal degree in co-relation 54899. Up to 5948 conditions per place. [2024-06-20 15:31:10,567 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 93 changer transitions 0/435 dead transitions. [2024-06-20 15:31:10,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 435 transitions, 6325 flow [2024-06-20 15:31:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:31:10,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:31:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-20 15:31:10,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216931216931217 [2024-06-20 15:31:10,568 INFO L175 Difference]: Start difference. First operand has 299 places, 394 transitions, 4685 flow. Second operand 9 states and 235 transitions. [2024-06-20 15:31:10,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 435 transitions, 6325 flow [2024-06-20 15:31:13,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 435 transitions, 6204 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:31:13,850 INFO L231 Difference]: Finished difference. Result has 304 places, 399 transitions, 4939 flow [2024-06-20 15:31:13,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4939, PETRI_PLACES=304, PETRI_TRANSITIONS=399} [2024-06-20 15:31:13,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-20 15:31:13,850 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 399 transitions, 4939 flow [2024-06-20 15:31:13,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:13,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:13,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:13,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:31:13,851 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:13,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:13,851 INFO L85 PathProgramCache]: Analyzing trace with hash -637524926, now seen corresponding path program 2 times [2024-06-20 15:31:13,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:13,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768950956] [2024-06-20 15:31:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:13,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:13,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:13,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768950956] [2024-06-20 15:31:13,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768950956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:13,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:13,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:13,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640469491] [2024-06-20 15:31:13,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:13,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:13,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:13,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:13,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:13,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:31:13,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 399 transitions, 4939 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:13,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:13,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:31:13,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:15,195 INFO L124 PetriNetUnfolderBase]: 4387/7602 cut-off events. [2024-06-20 15:31:15,195 INFO L125 PetriNetUnfolderBase]: For 1144741/1144741 co-relation queries the response was YES. [2024-06-20 15:31:15,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56293 conditions, 7602 events. 4387/7602 cut-off events. For 1144741/1144741 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 55071 event pairs, 1276 based on Foata normal form. 12/7610 useless extension candidates. Maximal degree in co-relation 56146. Up to 6472 conditions per place. [2024-06-20 15:31:15,298 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 82 changer transitions 0/429 dead transitions. [2024-06-20 15:31:15,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 429 transitions, 6223 flow [2024-06-20 15:31:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:31:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:31:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 15:31:15,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-20 15:31:15,299 INFO L175 Difference]: Start difference. First operand has 304 places, 399 transitions, 4939 flow. Second operand 8 states and 207 transitions. [2024-06-20 15:31:15,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 429 transitions, 6223 flow [2024-06-20 15:31:18,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 429 transitions, 6058 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 15:31:18,405 INFO L231 Difference]: Finished difference. Result has 309 places, 402 transitions, 5078 flow [2024-06-20 15:31:18,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4776, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5078, PETRI_PLACES=309, PETRI_TRANSITIONS=402} [2024-06-20 15:31:18,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-20 15:31:18,406 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 402 transitions, 5078 flow [2024-06-20 15:31:18,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:18,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:18,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:18,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:31:18,406 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:18,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash 319267840, now seen corresponding path program 3 times [2024-06-20 15:31:18,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:18,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113897332] [2024-06-20 15:31:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:18,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:18,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113897332] [2024-06-20 15:31:18,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113897332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:18,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:18,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:18,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883373639] [2024-06-20 15:31:18,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:18,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:18,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:18,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:18,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:18,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:31:18,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 402 transitions, 5078 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:18,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:18,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:31:18,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:19,714 INFO L124 PetriNetUnfolderBase]: 4397/7620 cut-off events. [2024-06-20 15:31:19,714 INFO L125 PetriNetUnfolderBase]: For 1148058/1148058 co-relation queries the response was YES. [2024-06-20 15:31:19,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55736 conditions, 7620 events. 4397/7620 cut-off events. For 1148058/1148058 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 55221 event pairs, 1287 based on Foata normal form. 16/7632 useless extension candidates. Maximal degree in co-relation 55586. Up to 6648 conditions per place. [2024-06-20 15:31:19,814 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 332 selfloop transitions, 85 changer transitions 0/426 dead transitions. [2024-06-20 15:31:19,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 426 transitions, 6039 flow [2024-06-20 15:31:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:31:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:31:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 15:31:19,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:31:19,815 INFO L175 Difference]: Start difference. First operand has 309 places, 402 transitions, 5078 flow. Second operand 8 states and 204 transitions. [2024-06-20 15:31:19,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 426 transitions, 6039 flow [2024-06-20 15:31:23,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 426 transitions, 5738 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 15:31:23,885 INFO L231 Difference]: Finished difference. Result has 310 places, 404 transitions, 5018 flow [2024-06-20 15:31:23,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4781, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5018, PETRI_PLACES=310, PETRI_TRANSITIONS=404} [2024-06-20 15:31:23,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-20 15:31:23,885 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 404 transitions, 5018 flow [2024-06-20 15:31:23,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:23,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:23,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:23,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:31:23,886 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:23,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -529030820, now seen corresponding path program 4 times [2024-06-20 15:31:23,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:23,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496102208] [2024-06-20 15:31:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:23,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:23,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:23,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496102208] [2024-06-20 15:31:23,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496102208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:23,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:23,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:31:23,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264648974] [2024-06-20 15:31:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:23,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:31:23,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:31:23,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:31:24,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:31:24,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 404 transitions, 5018 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:24,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:24,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:31:24,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:25,257 INFO L124 PetriNetUnfolderBase]: 4453/7696 cut-off events. [2024-06-20 15:31:25,257 INFO L125 PetriNetUnfolderBase]: For 1167720/1167720 co-relation queries the response was YES. [2024-06-20 15:31:25,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55836 conditions, 7696 events. 4453/7696 cut-off events. For 1167720/1167720 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 55887 event pairs, 1332 based on Foata normal form. 16/7694 useless extension candidates. Maximal degree in co-relation 55686. Up to 6736 conditions per place. [2024-06-20 15:31:25,346 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 321 selfloop transitions, 91 changer transitions 0/421 dead transitions. [2024-06-20 15:31:25,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 421 transitions, 5950 flow [2024-06-20 15:31:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:31:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:31:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:31:25,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-20 15:31:25,347 INFO L175 Difference]: Start difference. First operand has 310 places, 404 transitions, 5018 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:31:25,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 421 transitions, 5950 flow [2024-06-20 15:31:29,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 421 transitions, 5740 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 15:31:29,777 INFO L231 Difference]: Finished difference. Result has 311 places, 406 transitions, 5060 flow [2024-06-20 15:31:29,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4808, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5060, PETRI_PLACES=311, PETRI_TRANSITIONS=406} [2024-06-20 15:31:29,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-20 15:31:29,777 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 406 transitions, 5060 flow [2024-06-20 15:31:29,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:29,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:29,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:29,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:31:29,778 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:29,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:29,778 INFO L85 PathProgramCache]: Analyzing trace with hash -675823550, now seen corresponding path program 5 times [2024-06-20 15:31:29,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:29,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396829228] [2024-06-20 15:31:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:29,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:29,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:29,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396829228] [2024-06-20 15:31:29,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396829228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:29,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:29,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:31:29,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600943179] [2024-06-20 15:31:29,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:29,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:31:29,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:29,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:31:29,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:31:29,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:31:29,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 406 transitions, 5060 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:29,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:29,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:31:29,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:31,108 INFO L124 PetriNetUnfolderBase]: 4509/7792 cut-off events. [2024-06-20 15:31:31,108 INFO L125 PetriNetUnfolderBase]: For 1186094/1186094 co-relation queries the response was YES. [2024-06-20 15:31:31,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56461 conditions, 7792 events. 4509/7792 cut-off events. For 1186094/1186094 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 56696 event pairs, 1346 based on Foata normal form. 16/7790 useless extension candidates. Maximal degree in co-relation 56310. Up to 6824 conditions per place. [2024-06-20 15:31:31,212 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 83 changer transitions 0/423 dead transitions. [2024-06-20 15:31:31,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 423 transitions, 6000 flow [2024-06-20 15:31:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:31:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:31:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:31:31,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-20 15:31:31,214 INFO L175 Difference]: Start difference. First operand has 311 places, 406 transitions, 5060 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:31:31,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 423 transitions, 6000 flow [2024-06-20 15:31:35,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 423 transitions, 5770 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 15:31:35,643 INFO L231 Difference]: Finished difference. Result has 313 places, 408 transitions, 5070 flow [2024-06-20 15:31:35,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5070, PETRI_PLACES=313, PETRI_TRANSITIONS=408} [2024-06-20 15:31:35,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-20 15:31:35,644 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 408 transitions, 5070 flow [2024-06-20 15:31:35,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:35,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:35,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:35,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:31:35,644 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:35,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:35,645 INFO L85 PathProgramCache]: Analyzing trace with hash -675971420, now seen corresponding path program 6 times [2024-06-20 15:31:35,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:35,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420904785] [2024-06-20 15:31:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:35,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:35,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:35,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420904785] [2024-06-20 15:31:35,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420904785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:35,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:35,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:31:35,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841493371] [2024-06-20 15:31:35,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:35,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:31:35,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:35,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:31:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:31:35,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:31:35,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 408 transitions, 5070 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:35,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:35,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:31:35,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:36,976 INFO L124 PetriNetUnfolderBase]: 4576/7891 cut-off events. [2024-06-20 15:31:36,976 INFO L125 PetriNetUnfolderBase]: For 1209121/1209121 co-relation queries the response was YES. [2024-06-20 15:31:37,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57629 conditions, 7891 events. 4576/7891 cut-off events. For 1209121/1209121 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 57446 event pairs, 1340 based on Foata normal form. 12/7885 useless extension candidates. Maximal degree in co-relation 57477. Up to 6691 conditions per place. [2024-06-20 15:31:37,082 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 83 changer transitions 0/431 dead transitions. [2024-06-20 15:31:37,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 431 transitions, 6364 flow [2024-06-20 15:31:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:31:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:31:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:31:37,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-20 15:31:37,083 INFO L175 Difference]: Start difference. First operand has 313 places, 408 transitions, 5070 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:31:37,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 431 transitions, 6364 flow [2024-06-20 15:31:40,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 431 transitions, 6148 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 15:31:40,981 INFO L231 Difference]: Finished difference. Result has 316 places, 412 transitions, 5210 flow [2024-06-20 15:31:40,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4854, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5210, PETRI_PLACES=316, PETRI_TRANSITIONS=412} [2024-06-20 15:31:40,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-20 15:31:40,981 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 412 transitions, 5210 flow [2024-06-20 15:31:40,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:40,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:40,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:40,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:31:40,982 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:40,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:40,982 INFO L85 PathProgramCache]: Analyzing trace with hash -468897248, now seen corresponding path program 1 times [2024-06-20 15:31:40,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:40,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189004014] [2024-06-20 15:31:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:40,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:41,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:41,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189004014] [2024-06-20 15:31:41,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189004014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:41,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:41,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:31:41,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580035044] [2024-06-20 15:31:41,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:41,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:31:41,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:41,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:31:41,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:31:41,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:31:41,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 412 transitions, 5210 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:41,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:41,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:31:41,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:42,375 INFO L124 PetriNetUnfolderBase]: 4616/7977 cut-off events. [2024-06-20 15:31:42,376 INFO L125 PetriNetUnfolderBase]: For 1235234/1235234 co-relation queries the response was YES. [2024-06-20 15:31:42,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58196 conditions, 7977 events. 4616/7977 cut-off events. For 1235234/1235234 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 58249 event pairs, 1323 based on Foata normal form. 12/7971 useless extension candidates. Maximal degree in co-relation 58042. Up to 6797 conditions per place. [2024-06-20 15:31:42,482 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 323 selfloop transitions, 100 changer transitions 0/432 dead transitions. [2024-06-20 15:31:42,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 432 transitions, 6188 flow [2024-06-20 15:31:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:31:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:31:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:31:42,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-20 15:31:42,483 INFO L175 Difference]: Start difference. First operand has 316 places, 412 transitions, 5210 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:31:42,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 432 transitions, 6188 flow [2024-06-20 15:31:46,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 432 transitions, 6013 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-20 15:31:46,563 INFO L231 Difference]: Finished difference. Result has 320 places, 414 transitions, 5316 flow [2024-06-20 15:31:46,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5035, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5316, PETRI_PLACES=320, PETRI_TRANSITIONS=414} [2024-06-20 15:31:46,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-20 15:31:46,564 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 414 transitions, 5316 flow [2024-06-20 15:31:46,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:46,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:46,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:46,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:31:46,565 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:46,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:46,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1288097676, now seen corresponding path program 7 times [2024-06-20 15:31:46,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:46,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898926277] [2024-06-20 15:31:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:46,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:46,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:46,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898926277] [2024-06-20 15:31:46,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898926277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:46,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:46,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:31:46,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373186995] [2024-06-20 15:31:46,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:46,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:31:46,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:46,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:31:46,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:31:46,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:31:46,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 414 transitions, 5316 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:46,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:46,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:31:46,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:47,983 INFO L124 PetriNetUnfolderBase]: 4656/8038 cut-off events. [2024-06-20 15:31:47,983 INFO L125 PetriNetUnfolderBase]: For 1251916/1251916 co-relation queries the response was YES. [2024-06-20 15:31:48,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58597 conditions, 8038 events. 4656/8038 cut-off events. For 1251916/1251916 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 58675 event pairs, 1142 based on Foata normal form. 12/8046 useless extension candidates. Maximal degree in co-relation 58441. Up to 6704 conditions per place. [2024-06-20 15:31:48,089 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 92 changer transitions 2/444 dead transitions. [2024-06-20 15:31:48,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 444 transitions, 6529 flow [2024-06-20 15:31:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:31:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:31:48,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 15:31:48,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-20 15:31:48,090 INFO L175 Difference]: Start difference. First operand has 320 places, 414 transitions, 5316 flow. Second operand 7 states and 189 transitions. [2024-06-20 15:31:48,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 444 transitions, 6529 flow [2024-06-20 15:31:51,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 444 transitions, 6268 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 15:31:51,535 INFO L231 Difference]: Finished difference. Result has 322 places, 414 transitions, 5258 flow [2024-06-20 15:31:51,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5258, PETRI_PLACES=322, PETRI_TRANSITIONS=414} [2024-06-20 15:31:51,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-20 15:31:51,536 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 414 transitions, 5258 flow [2024-06-20 15:31:51,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:51,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:51,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:51,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:31:51,537 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:51,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:51,537 INFO L85 PathProgramCache]: Analyzing trace with hash -681390176, now seen corresponding path program 8 times [2024-06-20 15:31:51,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:51,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764924744] [2024-06-20 15:31:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:51,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:51,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:51,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764924744] [2024-06-20 15:31:51,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764924744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:51,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:51,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:31:51,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284873307] [2024-06-20 15:31:51,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:51,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:31:51,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:51,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:31:51,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:31:51,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:31:51,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 414 transitions, 5258 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:51,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:51,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:31:51,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:53,014 INFO L124 PetriNetUnfolderBase]: 4688/8075 cut-off events. [2024-06-20 15:31:53,015 INFO L125 PetriNetUnfolderBase]: For 1297622/1297622 co-relation queries the response was YES. [2024-06-20 15:31:53,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58739 conditions, 8075 events. 4688/8075 cut-off events. For 1297622/1297622 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 58857 event pairs, 1346 based on Foata normal form. 16/8087 useless extension candidates. Maximal degree in co-relation 58582. Up to 7113 conditions per place. [2024-06-20 15:31:53,112 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 345 selfloop transitions, 81 changer transitions 2/437 dead transitions. [2024-06-20 15:31:53,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 437 transitions, 6209 flow [2024-06-20 15:31:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:31:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:31:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:31:53,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-20 15:31:53,113 INFO L175 Difference]: Start difference. First operand has 322 places, 414 transitions, 5258 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:31:53,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 437 transitions, 6209 flow [2024-06-20 15:31:57,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 437 transitions, 6047 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:31:57,274 INFO L231 Difference]: Finished difference. Result has 325 places, 414 transitions, 5276 flow [2024-06-20 15:31:57,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5276, PETRI_PLACES=325, PETRI_TRANSITIONS=414} [2024-06-20 15:31:57,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-20 15:31:57,275 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 414 transitions, 5276 flow [2024-06-20 15:31:57,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:57,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:57,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:57,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:31:57,276 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:57,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:57,276 INFO L85 PathProgramCache]: Analyzing trace with hash -482088386, now seen corresponding path program 9 times [2024-06-20 15:31:57,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:57,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121141993] [2024-06-20 15:31:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:57,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:57,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:57,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121141993] [2024-06-20 15:31:57,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121141993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:57,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:57,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:31:57,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610917582] [2024-06-20 15:31:57,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:57,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:31:57,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:57,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:31:57,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:31:57,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:31:57,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 414 transitions, 5276 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:57,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:57,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:31:57,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:58,860 INFO L124 PetriNetUnfolderBase]: 4711/8110 cut-off events. [2024-06-20 15:31:58,860 INFO L125 PetriNetUnfolderBase]: For 1320058/1320058 co-relation queries the response was YES. [2024-06-20 15:31:58,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59035 conditions, 8110 events. 4711/8110 cut-off events. For 1320058/1320058 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 59120 event pairs, 1350 based on Foata normal form. 16/8122 useless extension candidates. Maximal degree in co-relation 58877. Up to 7153 conditions per place. [2024-06-20 15:31:58,952 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 81 changer transitions 1/434 dead transitions. [2024-06-20 15:31:58,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 434 transitions, 6216 flow [2024-06-20 15:31:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:31:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:31:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:31:58,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-20 15:31:58,953 INFO L175 Difference]: Start difference. First operand has 325 places, 414 transitions, 5276 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:31:58,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 434 transitions, 6216 flow [2024-06-20 15:32:02,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 434 transitions, 6051 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:32:02,741 INFO L231 Difference]: Finished difference. Result has 327 places, 415 transitions, 5300 flow [2024-06-20 15:32:02,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5111, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5300, PETRI_PLACES=327, PETRI_TRANSITIONS=415} [2024-06-20 15:32:02,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-20 15:32:02,742 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 415 transitions, 5300 flow [2024-06-20 15:32:02,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:02,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:02,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:02,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:32:02,742 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:02,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1201765852, now seen corresponding path program 10 times [2024-06-20 15:32:02,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:02,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761673992] [2024-06-20 15:32:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:02,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:02,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:02,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761673992] [2024-06-20 15:32:02,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761673992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:02,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:02,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:32:02,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926724538] [2024-06-20 15:32:02,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:02,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:32:02,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:02,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:32:02,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:32:02,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:32:02,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 415 transitions, 5300 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:02,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:02,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:32:02,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:04,170 INFO L124 PetriNetUnfolderBase]: 4627/7949 cut-off events. [2024-06-20 15:32:04,170 INFO L125 PetriNetUnfolderBase]: For 1231526/1231526 co-relation queries the response was YES. [2024-06-20 15:32:04,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56647 conditions, 7949 events. 4627/7949 cut-off events. For 1231526/1231526 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 57780 event pairs, 1331 based on Foata normal form. 16/7952 useless extension candidates. Maximal degree in co-relation 56488. Up to 7021 conditions per place. [2024-06-20 15:32:04,281 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 86 changer transitions 1/430 dead transitions. [2024-06-20 15:32:04,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 430 transitions, 6190 flow [2024-06-20 15:32:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:32:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:32:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:32:04,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-20 15:32:04,282 INFO L175 Difference]: Start difference. First operand has 327 places, 415 transitions, 5300 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:32:04,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 430 transitions, 6190 flow [2024-06-20 15:32:08,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 430 transitions, 6021 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 15:32:08,838 INFO L231 Difference]: Finished difference. Result has 329 places, 414 transitions, 5292 flow [2024-06-20 15:32:08,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5131, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5292, PETRI_PLACES=329, PETRI_TRANSITIONS=414} [2024-06-20 15:32:08,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-20 15:32:08,839 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 414 transitions, 5292 flow [2024-06-20 15:32:08,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:08,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:08,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:08,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:32:08,839 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:08,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash -474463874, now seen corresponding path program 2 times [2024-06-20 15:32:08,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:08,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012758658] [2024-06-20 15:32:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:08,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:08,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:08,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012758658] [2024-06-20 15:32:08,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012758658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:08,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:08,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:32:08,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852214143] [2024-06-20 15:32:08,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:08,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:32:08,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:08,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:32:08,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:32:08,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:32:08,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 414 transitions, 5292 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:08,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:08,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:32:08,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:10,227 INFO L124 PetriNetUnfolderBase]: 4555/7850 cut-off events. [2024-06-20 15:32:10,228 INFO L125 PetriNetUnfolderBase]: For 1225924/1225924 co-relation queries the response was YES. [2024-06-20 15:32:10,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56652 conditions, 7850 events. 4555/7850 cut-off events. For 1225924/1225924 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 56934 event pairs, 1250 based on Foata normal form. 12/7858 useless extension candidates. Maximal degree in co-relation 56492. Up to 6817 conditions per place. [2024-06-20 15:32:10,335 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 86 changer transitions 0/437 dead transitions. [2024-06-20 15:32:10,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 437 transitions, 6292 flow [2024-06-20 15:32:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:32:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:32:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:32:10,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-20 15:32:10,336 INFO L175 Difference]: Start difference. First operand has 329 places, 414 transitions, 5292 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:32:10,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 437 transitions, 6292 flow [2024-06-20 15:32:14,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 437 transitions, 6044 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:32:14,624 INFO L231 Difference]: Finished difference. Result has 329 places, 416 transitions, 5301 flow [2024-06-20 15:32:14,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5301, PETRI_PLACES=329, PETRI_TRANSITIONS=416} [2024-06-20 15:32:14,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-20 15:32:14,624 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 416 transitions, 5301 flow [2024-06-20 15:32:14,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:14,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:14,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:14,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:32:14,625 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:14,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:14,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1209390364, now seen corresponding path program 3 times [2024-06-20 15:32:14,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:14,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628366223] [2024-06-20 15:32:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:14,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:14,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:14,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628366223] [2024-06-20 15:32:14,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628366223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:14,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:14,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:32:14,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608062495] [2024-06-20 15:32:14,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:14,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:32:14,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:14,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:32:14,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:32:14,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:32:14,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 416 transitions, 5301 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:14,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:14,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:32:14,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:16,014 INFO L124 PetriNetUnfolderBase]: 4595/7905 cut-off events. [2024-06-20 15:32:16,015 INFO L125 PetriNetUnfolderBase]: For 1249873/1249873 co-relation queries the response was YES. [2024-06-20 15:32:16,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57247 conditions, 7905 events. 4595/7905 cut-off events. For 1249873/1249873 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 57472 event pairs, 1291 based on Foata normal form. 12/7904 useless extension candidates. Maximal degree in co-relation 57086. Up to 6913 conditions per place. [2024-06-20 15:32:16,126 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 337 selfloop transitions, 90 changer transitions 0/436 dead transitions. [2024-06-20 15:32:16,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 436 transitions, 6295 flow [2024-06-20 15:32:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:32:16,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:32:16,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:32:16,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-20 15:32:16,127 INFO L175 Difference]: Start difference. First operand has 329 places, 416 transitions, 5301 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:32:16,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 436 transitions, 6295 flow [2024-06-20 15:32:21,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 436 transitions, 6058 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 15:32:21,592 INFO L231 Difference]: Finished difference. Result has 331 places, 418 transitions, 5333 flow [2024-06-20 15:32:21,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5333, PETRI_PLACES=331, PETRI_TRANSITIONS=418} [2024-06-20 15:32:21,593 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-20 15:32:21,593 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 418 transitions, 5333 flow [2024-06-20 15:32:21,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:21,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:21,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:21,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:32:21,594 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:21,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:21,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1771250972, now seen corresponding path program 4 times [2024-06-20 15:32:21,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:21,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187445701] [2024-06-20 15:32:21,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:21,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:21,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:21,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187445701] [2024-06-20 15:32:21,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187445701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:21,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:21,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:32:21,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958883998] [2024-06-20 15:32:21,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:21,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:32:21,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:21,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:32:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:32:21,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:32:21,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 418 transitions, 5333 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:21,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:21,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:32:21,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:23,490 INFO L124 PetriNetUnfolderBase]: 4602/7940 cut-off events. [2024-06-20 15:32:23,490 INFO L125 PetriNetUnfolderBase]: For 1225031/1225031 co-relation queries the response was YES. [2024-06-20 15:32:23,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56495 conditions, 7940 events. 4602/7940 cut-off events. For 1225031/1225031 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57890 event pairs, 1256 based on Foata normal form. 12/7939 useless extension candidates. Maximal degree in co-relation 56333. Up to 6442 conditions per place. [2024-06-20 15:32:23,591 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 319 selfloop transitions, 110 changer transitions 0/438 dead transitions. [2024-06-20 15:32:23,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 438 transitions, 6293 flow [2024-06-20 15:32:23,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:32:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:32:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:32:23,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-20 15:32:23,592 INFO L175 Difference]: Start difference. First operand has 331 places, 418 transitions, 5333 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:32:23,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 438 transitions, 6293 flow [2024-06-20 15:32:29,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 438 transitions, 6044 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 15:32:29,487 INFO L231 Difference]: Finished difference. Result has 333 places, 419 transitions, 5351 flow [2024-06-20 15:32:29,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5084, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5351, PETRI_PLACES=333, PETRI_TRANSITIONS=419} [2024-06-20 15:32:29,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-20 15:32:29,488 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 419 transitions, 5351 flow [2024-06-20 15:32:29,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:29,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:29,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:29,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:32:29,489 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:29,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:29,489 INFO L85 PathProgramCache]: Analyzing trace with hash -276218431, now seen corresponding path program 1 times [2024-06-20 15:32:29,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:29,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142429349] [2024-06-20 15:32:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:29,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:29,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:29,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142429349] [2024-06-20 15:32:29,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142429349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:29,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:29,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:29,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126887534] [2024-06-20 15:32:29,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:29,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:29,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:29,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:29,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:29,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:32:29,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 419 transitions, 5351 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:29,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:29,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:32:29,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:31,299 INFO L124 PetriNetUnfolderBase]: 4607/7961 cut-off events. [2024-06-20 15:32:31,299 INFO L125 PetriNetUnfolderBase]: For 1159755/1159755 co-relation queries the response was YES. [2024-06-20 15:32:31,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56575 conditions, 7961 events. 4607/7961 cut-off events. For 1159755/1159755 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 57987 event pairs, 1245 based on Foata normal form. 1/7960 useless extension candidates. Maximal degree in co-relation 56412. Up to 7246 conditions per place. [2024-06-20 15:32:31,406 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 27 changer transitions 0/454 dead transitions. [2024-06-20 15:32:31,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 454 transitions, 6605 flow [2024-06-20 15:32:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:32:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:32:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 15:32:31,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-20 15:32:31,408 INFO L175 Difference]: Start difference. First operand has 333 places, 419 transitions, 5351 flow. Second operand 9 states and 224 transitions. [2024-06-20 15:32:31,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 454 transitions, 6605 flow [2024-06-20 15:32:36,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 454 transitions, 6235 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-20 15:32:36,445 INFO L231 Difference]: Finished difference. Result has 335 places, 422 transitions, 5083 flow [2024-06-20 15:32:36,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4981, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5083, PETRI_PLACES=335, PETRI_TRANSITIONS=422} [2024-06-20 15:32:36,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-20 15:32:36,446 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 422 transitions, 5083 flow [2024-06-20 15:32:36,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:36,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:36,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:36,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:32:36,446 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:36,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:36,447 INFO L85 PathProgramCache]: Analyzing trace with hash 45288803, now seen corresponding path program 2 times [2024-06-20 15:32:36,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:36,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196863691] [2024-06-20 15:32:36,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:36,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:36,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:36,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196863691] [2024-06-20 15:32:36,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196863691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:36,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:36,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:32:36,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201253232] [2024-06-20 15:32:36,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:36,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:32:36,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:36,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:32:36,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:32:36,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:32:36,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 422 transitions, 5083 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:36,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:36,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:32:36,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:38,212 INFO L124 PetriNetUnfolderBase]: 4604/7945 cut-off events. [2024-06-20 15:32:38,212 INFO L125 PetriNetUnfolderBase]: For 1164154/1164154 co-relation queries the response was YES. [2024-06-20 15:32:38,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55345 conditions, 7945 events. 4604/7945 cut-off events. For 1164154/1164154 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57766 event pairs, 1235 based on Foata normal form. 1/7944 useless extension candidates. Maximal degree in co-relation 55183. Up to 7243 conditions per place. [2024-06-20 15:32:38,321 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 27 changer transitions 0/449 dead transitions. [2024-06-20 15:32:38,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 449 transitions, 6031 flow [2024-06-20 15:32:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:38,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:32:38,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-20 15:32:38,322 INFO L175 Difference]: Start difference. First operand has 335 places, 422 transitions, 5083 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:32:38,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 449 transitions, 6031 flow [2024-06-20 15:32:43,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 449 transitions, 5949 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 15:32:43,434 INFO L231 Difference]: Finished difference. Result has 335 places, 422 transitions, 5061 flow [2024-06-20 15:32:43,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5001, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5061, PETRI_PLACES=335, PETRI_TRANSITIONS=422} [2024-06-20 15:32:43,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-20 15:32:43,434 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 422 transitions, 5061 flow [2024-06-20 15:32:43,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:43,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:43,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:43,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:32:43,435 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:43,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -838574683, now seen corresponding path program 1 times [2024-06-20 15:32:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:43,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649485918] [2024-06-20 15:32:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:43,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:43,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:43,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649485918] [2024-06-20 15:32:43,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649485918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:43,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:43,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:43,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328680638] [2024-06-20 15:32:43,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:43,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:43,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:43,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:43,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:43,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:32:43,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 422 transitions, 5061 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:43,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:43,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:32:43,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:45,362 INFO L124 PetriNetUnfolderBase]: 4625/7950 cut-off events. [2024-06-20 15:32:45,363 INFO L125 PetriNetUnfolderBase]: For 1213861/1213861 co-relation queries the response was YES. [2024-06-20 15:32:45,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56122 conditions, 7950 events. 4625/7950 cut-off events. For 1213861/1213861 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 57738 event pairs, 1234 based on Foata normal form. 2/7923 useless extension candidates. Maximal degree in co-relation 55960. Up to 7009 conditions per place. [2024-06-20 15:32:45,462 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 113 changer transitions 2/459 dead transitions. [2024-06-20 15:32:45,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 459 transitions, 6495 flow [2024-06-20 15:32:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:32:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:32:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-20 15:32:45,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6164021164021164 [2024-06-20 15:32:45,463 INFO L175 Difference]: Start difference. First operand has 335 places, 422 transitions, 5061 flow. Second operand 9 states and 233 transitions. [2024-06-20 15:32:45,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 459 transitions, 6495 flow [2024-06-20 15:32:49,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 459 transitions, 6431 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:32:49,945 INFO L231 Difference]: Finished difference. Result has 338 places, 426 transitions, 5441 flow [2024-06-20 15:32:49,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4997, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5441, PETRI_PLACES=338, PETRI_TRANSITIONS=426} [2024-06-20 15:32:49,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-20 15:32:49,945 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 426 transitions, 5441 flow [2024-06-20 15:32:49,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:49,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:49,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:49,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:32:49,947 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:49,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:49,948 INFO L85 PathProgramCache]: Analyzing trace with hash 919759199, now seen corresponding path program 2 times [2024-06-20 15:32:49,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:49,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869136175] [2024-06-20 15:32:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:49,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:50,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:50,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869136175] [2024-06-20 15:32:50,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869136175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:50,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:50,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:50,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65097947] [2024-06-20 15:32:50,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:50,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:50,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:50,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:50,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:50,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:32:50,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 426 transitions, 5441 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:50,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:50,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:32:50,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:51,844 INFO L124 PetriNetUnfolderBase]: 4620/7953 cut-off events. [2024-06-20 15:32:51,844 INFO L125 PetriNetUnfolderBase]: For 1216298/1216298 co-relation queries the response was YES. [2024-06-20 15:32:51,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56375 conditions, 7953 events. 4620/7953 cut-off events. For 1216298/1216298 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 57842 event pairs, 1259 based on Foata normal form. 2/7938 useless extension candidates. Maximal degree in co-relation 56211. Up to 7059 conditions per place. [2024-06-20 15:32:51,947 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 334 selfloop transitions, 108 changer transitions 0/451 dead transitions. [2024-06-20 15:32:51,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 451 transitions, 6387 flow [2024-06-20 15:32:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 15:32:51,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-20 15:32:51,952 INFO L175 Difference]: Start difference. First operand has 338 places, 426 transitions, 5441 flow. Second operand 8 states and 206 transitions. [2024-06-20 15:32:51,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 451 transitions, 6387 flow [2024-06-20 15:32:57,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 451 transitions, 6078 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-20 15:32:57,712 INFO L231 Difference]: Finished difference. Result has 341 places, 426 transitions, 5353 flow [2024-06-20 15:32:57,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5353, PETRI_PLACES=341, PETRI_TRANSITIONS=426} [2024-06-20 15:32:57,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-20 15:32:57,713 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 426 transitions, 5353 flow [2024-06-20 15:32:57,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:57,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:57,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:57,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:32:57,713 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:57,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1025612251, now seen corresponding path program 3 times [2024-06-20 15:32:57,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:57,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021217680] [2024-06-20 15:32:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:57,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:57,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:57,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021217680] [2024-06-20 15:32:57,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021217680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:57,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:57,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:57,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049099039] [2024-06-20 15:32:57,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:57,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:57,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:57,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:32:57,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 426 transitions, 5353 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:57,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:57,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:32:57,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:59,527 INFO L124 PetriNetUnfolderBase]: 4628/7971 cut-off events. [2024-06-20 15:32:59,528 INFO L125 PetriNetUnfolderBase]: For 1238710/1238710 co-relation queries the response was YES. [2024-06-20 15:32:59,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56686 conditions, 7971 events. 4628/7971 cut-off events. For 1238710/1238710 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 57993 event pairs, 1263 based on Foata normal form. 2/7958 useless extension candidates. Maximal degree in co-relation 56520. Up to 7071 conditions per place. [2024-06-20 15:32:59,634 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 108 changer transitions 0/447 dead transitions. [2024-06-20 15:32:59,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 447 transitions, 6377 flow [2024-06-20 15:32:59,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:32:59,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-20 15:32:59,635 INFO L175 Difference]: Start difference. First operand has 341 places, 426 transitions, 5353 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:32:59,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 447 transitions, 6377 flow [2024-06-20 15:33:05,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 447 transitions, 6139 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:33:05,054 INFO L231 Difference]: Finished difference. Result has 342 places, 428 transitions, 5442 flow [2024-06-20 15:33:05,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5115, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5442, PETRI_PLACES=342, PETRI_TRANSITIONS=428} [2024-06-20 15:33:05,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-20 15:33:05,054 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 428 transitions, 5442 flow [2024-06-20 15:33:05,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:05,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:05,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:05,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:33:05,055 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:05,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:05,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1560166123, now seen corresponding path program 4 times [2024-06-20 15:33:05,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:05,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538384054] [2024-06-20 15:33:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:05,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:05,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:05,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538384054] [2024-06-20 15:33:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538384054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:05,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:05,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:05,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351110788] [2024-06-20 15:33:05,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:05,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:05,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:05,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:05,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:05,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:33:05,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 428 transitions, 5442 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:05,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:05,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:33:05,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:06,911 INFO L124 PetriNetUnfolderBase]: 4636/7979 cut-off events. [2024-06-20 15:33:06,911 INFO L125 PetriNetUnfolderBase]: For 1261430/1261430 co-relation queries the response was YES. [2024-06-20 15:33:06,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57075 conditions, 7979 events. 4636/7979 cut-off events. For 1261430/1261430 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 58020 event pairs, 1259 based on Foata normal form. 2/7962 useless extension candidates. Maximal degree in co-relation 56908. Up to 7063 conditions per place. [2024-06-20 15:33:07,026 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 113 changer transitions 0/451 dead transitions. [2024-06-20 15:33:07,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 451 transitions, 6482 flow [2024-06-20 15:33:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:33:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:33:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-20 15:33:07,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-20 15:33:07,027 INFO L175 Difference]: Start difference. First operand has 342 places, 428 transitions, 5442 flow. Second operand 9 states and 220 transitions. [2024-06-20 15:33:07,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 451 transitions, 6482 flow [2024-06-20 15:33:12,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 451 transitions, 6171 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-20 15:33:12,803 INFO L231 Difference]: Finished difference. Result has 345 places, 430 transitions, 5472 flow [2024-06-20 15:33:12,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5131, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5472, PETRI_PLACES=345, PETRI_TRANSITIONS=430} [2024-06-20 15:33:12,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-20 15:33:12,803 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 430 transitions, 5472 flow [2024-06-20 15:33:12,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:12,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:12,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:12,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:33:12,804 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:12,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:12,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1368301545, now seen corresponding path program 3 times [2024-06-20 15:33:12,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:12,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534458890] [2024-06-20 15:33:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:12,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:12,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:12,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534458890] [2024-06-20 15:33:12,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534458890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:12,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:12,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:12,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233810913] [2024-06-20 15:33:12,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:12,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:12,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:12,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:33:12,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 430 transitions, 5472 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:12,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:12,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:33:12,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:14,731 INFO L124 PetriNetUnfolderBase]: 4641/7984 cut-off events. [2024-06-20 15:33:14,732 INFO L125 PetriNetUnfolderBase]: For 1272253/1272253 co-relation queries the response was YES. [2024-06-20 15:33:14,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57186 conditions, 7984 events. 4641/7984 cut-off events. For 1272253/1272253 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 58009 event pairs, 1250 based on Foata normal form. 1/7963 useless extension candidates. Maximal degree in co-relation 57018. Up to 6748 conditions per place. [2024-06-20 15:33:14,834 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 288 selfloop transitions, 166 changer transitions 0/463 dead transitions. [2024-06-20 15:33:14,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 463 transitions, 7262 flow [2024-06-20 15:33:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-20 15:33:14,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-20 15:33:14,835 INFO L175 Difference]: Start difference. First operand has 345 places, 430 transitions, 5472 flow. Second operand 8 states and 217 transitions. [2024-06-20 15:33:14,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 463 transitions, 7262 flow [2024-06-20 15:33:20,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 463 transitions, 6937 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-20 15:33:20,510 INFO L231 Difference]: Finished difference. Result has 346 places, 433 transitions, 5531 flow [2024-06-20 15:33:20,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5531, PETRI_PLACES=346, PETRI_TRANSITIONS=433} [2024-06-20 15:33:20,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-20 15:33:20,510 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 433 transitions, 5531 flow [2024-06-20 15:33:20,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:20,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:20,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:20,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:33:20,511 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:20,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:20,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1098122123, now seen corresponding path program 4 times [2024-06-20 15:33:20,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:20,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750189286] [2024-06-20 15:33:20,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:20,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:20,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:20,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750189286] [2024-06-20 15:33:20,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750189286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:20,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:20,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:20,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382321657] [2024-06-20 15:33:20,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:20,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:20,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:20,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:20,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:20,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:33:20,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 433 transitions, 5531 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:20,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:20,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:33:20,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:22,510 INFO L124 PetriNetUnfolderBase]: 4654/8004 cut-off events. [2024-06-20 15:33:22,511 INFO L125 PetriNetUnfolderBase]: For 1298140/1298140 co-relation queries the response was YES. [2024-06-20 15:33:22,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57658 conditions, 8004 events. 4654/8004 cut-off events. For 1298140/1298140 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 58262 event pairs, 1250 based on Foata normal form. 1/7983 useless extension candidates. Maximal degree in co-relation 57489. Up to 6758 conditions per place. [2024-06-20 15:33:22,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 172 changer transitions 0/467 dead transitions. [2024-06-20 15:33:22,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 467 transitions, 7643 flow [2024-06-20 15:33:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:22,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-20 15:33:22,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6398809523809523 [2024-06-20 15:33:22,623 INFO L175 Difference]: Start difference. First operand has 346 places, 433 transitions, 5531 flow. Second operand 8 states and 215 transitions. [2024-06-20 15:33:22,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 467 transitions, 7643 flow [2024-06-20 15:33:28,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 467 transitions, 7273 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:33:28,456 INFO L231 Difference]: Finished difference. Result has 348 places, 439 transitions, 5615 flow [2024-06-20 15:33:28,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5615, PETRI_PLACES=348, PETRI_TRANSITIONS=439} [2024-06-20 15:33:28,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-20 15:33:28,456 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 439 transitions, 5615 flow [2024-06-20 15:33:28,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:28,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:28,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:28,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:33:28,457 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:28,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:28,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2055619729, now seen corresponding path program 5 times [2024-06-20 15:33:28,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:28,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763137485] [2024-06-20 15:33:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:28,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:28,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:28,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763137485] [2024-06-20 15:33:28,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763137485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:28,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:28,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:28,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316318482] [2024-06-20 15:33:28,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:28,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:28,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:28,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:28,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:33:28,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 439 transitions, 5615 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:28,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:28,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:33:28,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:30,433 INFO L124 PetriNetUnfolderBase]: 4651/8000 cut-off events. [2024-06-20 15:33:30,434 INFO L125 PetriNetUnfolderBase]: For 1309242/1309242 co-relation queries the response was YES. [2024-06-20 15:33:30,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57621 conditions, 8000 events. 4651/8000 cut-off events. For 1309242/1309242 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 58206 event pairs, 1250 based on Foata normal form. 1/7979 useless extension candidates. Maximal degree in co-relation 57451. Up to 6756 conditions per place. [2024-06-20 15:33:30,537 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 175 changer transitions 0/469 dead transitions. [2024-06-20 15:33:30,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 469 transitions, 7383 flow [2024-06-20 15:33:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-20 15:33:30,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-20 15:33:30,538 INFO L175 Difference]: Start difference. First operand has 348 places, 439 transitions, 5615 flow. Second operand 8 states and 217 transitions. [2024-06-20 15:33:30,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 469 transitions, 7383 flow [2024-06-20 15:33:36,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 469 transitions, 7087 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 15:33:36,172 INFO L231 Difference]: Finished difference. Result has 352 places, 439 transitions, 5675 flow [2024-06-20 15:33:36,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5675, PETRI_PLACES=352, PETRI_TRANSITIONS=439} [2024-06-20 15:33:36,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-20 15:33:36,173 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 439 transitions, 5675 flow [2024-06-20 15:33:36,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:36,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:36,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:36,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:33:36,173 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:36,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:36,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2044191889, now seen corresponding path program 6 times [2024-06-20 15:33:36,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:36,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376010753] [2024-06-20 15:33:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:36,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:36,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:36,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376010753] [2024-06-20 15:33:36,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376010753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:36,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:36,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:36,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780389647] [2024-06-20 15:33:36,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:36,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:36,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:36,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:36,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:36,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:33:36,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 439 transitions, 5675 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:36,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:36,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:33:36,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:37,970 INFO L124 PetriNetUnfolderBase]: 4656/8021 cut-off events. [2024-06-20 15:33:37,970 INFO L125 PetriNetUnfolderBase]: For 1329106/1329106 co-relation queries the response was YES. [2024-06-20 15:33:38,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57888 conditions, 8021 events. 4656/8021 cut-off events. For 1329106/1329106 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 58490 event pairs, 1260 based on Foata normal form. 1/8000 useless extension candidates. Maximal degree in co-relation 57717. Up to 6760 conditions per place. [2024-06-20 15:33:38,073 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 282 selfloop transitions, 178 changer transitions 0/469 dead transitions. [2024-06-20 15:33:38,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 469 transitions, 7496 flow [2024-06-20 15:33:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:33:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:33:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-20 15:33:38,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-20 15:33:38,074 INFO L175 Difference]: Start difference. First operand has 352 places, 439 transitions, 5675 flow. Second operand 8 states and 214 transitions. [2024-06-20 15:33:38,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 469 transitions, 7496 flow [2024-06-20 15:33:43,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 469 transitions, 7035 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:33:43,129 INFO L231 Difference]: Finished difference. Result has 352 places, 442 transitions, 5631 flow [2024-06-20 15:33:43,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5223, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5631, PETRI_PLACES=352, PETRI_TRANSITIONS=442} [2024-06-20 15:33:43,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-20 15:33:43,130 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 442 transitions, 5631 flow [2024-06-20 15:33:43,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:43,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:43,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:43,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:33:43,130 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:43,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:43,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1828590947, now seen corresponding path program 7 times [2024-06-20 15:33:43,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:43,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876701560] [2024-06-20 15:33:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:43,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:43,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:43,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876701560] [2024-06-20 15:33:43,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876701560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:43,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:43,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:33:43,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798483677] [2024-06-20 15:33:43,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:43,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:33:43,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:43,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:33:43,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:33:43,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:33:43,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 442 transitions, 5631 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:43,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:43,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:33:43,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:44,748 INFO L124 PetriNetUnfolderBase]: 4677/8046 cut-off events. [2024-06-20 15:33:44,748 INFO L125 PetriNetUnfolderBase]: For 1365858/1365858 co-relation queries the response was YES. [2024-06-20 15:33:44,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58490 conditions, 8046 events. 4677/8046 cut-off events. For 1365858/1365858 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 58627 event pairs, 1252 based on Foata normal form. 1/8025 useless extension candidates. Maximal degree in co-relation 58318. Up to 6776 conditions per place. [2024-06-20 15:33:44,856 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 192 changer transitions 0/472 dead transitions. [2024-06-20 15:33:44,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 472 transitions, 7811 flow [2024-06-20 15:33:45,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:33:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:33:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-20 15:33:45,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-06-20 15:33:45,014 INFO L175 Difference]: Start difference. First operand has 352 places, 442 transitions, 5631 flow. Second operand 7 states and 187 transitions. [2024-06-20 15:33:45,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 472 transitions, 7811 flow [2024-06-20 15:33:50,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 472 transitions, 7503 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 15:33:50,834 INFO L231 Difference]: Finished difference. Result has 354 places, 451 transitions, 5869 flow [2024-06-20 15:33:50,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5869, PETRI_PLACES=354, PETRI_TRANSITIONS=451} [2024-06-20 15:33:50,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-20 15:33:50,835 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 451 transitions, 5869 flow [2024-06-20 15:33:50,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:50,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:50,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:50,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:33:50,836 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:50,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:50,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1769748335, now seen corresponding path program 8 times [2024-06-20 15:33:50,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:50,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756118126] [2024-06-20 15:33:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:50,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:50,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:50,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756118126] [2024-06-20 15:33:50,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756118126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:50,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:50,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:33:50,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171314452] [2024-06-20 15:33:50,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:50,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:33:50,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:50,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:33:50,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:33:50,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:33:50,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 451 transitions, 5869 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:50,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:50,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:33:50,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:52,634 INFO L124 PetriNetUnfolderBase]: 4690/8064 cut-off events. [2024-06-20 15:33:52,634 INFO L125 PetriNetUnfolderBase]: For 1395937/1395937 co-relation queries the response was YES. [2024-06-20 15:33:52,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58949 conditions, 8064 events. 4690/8064 cut-off events. For 1395937/1395937 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 58698 event pairs, 1250 based on Foata normal form. 1/8043 useless extension candidates. Maximal degree in co-relation 58776. Up to 6786 conditions per place. [2024-06-20 15:33:52,746 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 198 changer transitions 0/478 dead transitions. [2024-06-20 15:33:52,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 478 transitions, 8023 flow [2024-06-20 15:33:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:33:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:33:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 15:33:52,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-20 15:33:52,748 INFO L175 Difference]: Start difference. First operand has 354 places, 451 transitions, 5869 flow. Second operand 7 states and 186 transitions. [2024-06-20 15:33:52,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 478 transitions, 8023 flow [2024-06-20 15:33:59,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 478 transitions, 7739 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-20 15:33:59,049 INFO L231 Difference]: Finished difference. Result has 359 places, 457 transitions, 6097 flow [2024-06-20 15:33:59,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5609, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6097, PETRI_PLACES=359, PETRI_TRANSITIONS=457} [2024-06-20 15:33:59,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-20 15:33:59,072 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 457 transitions, 6097 flow [2024-06-20 15:33:59,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:59,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:59,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:59,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:33:59,073 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:59,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:59,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1160154901, now seen corresponding path program 9 times [2024-06-20 15:33:59,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:59,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833098953] [2024-06-20 15:33:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:59,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:59,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:59,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833098953] [2024-06-20 15:33:59,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833098953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:59,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:59,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:59,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402590767] [2024-06-20 15:33:59,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:59,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:59,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:59,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:59,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:59,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:33:59,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 457 transitions, 6097 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:59,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:59,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:33:59,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:01,035 INFO L124 PetriNetUnfolderBase]: 4695/8073 cut-off events. [2024-06-20 15:34:01,036 INFO L125 PetriNetUnfolderBase]: For 1417265/1417265 co-relation queries the response was YES. [2024-06-20 15:34:01,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59187 conditions, 8073 events. 4695/8073 cut-off events. For 1417265/1417265 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 58760 event pairs, 1279 based on Foata normal form. 1/8052 useless extension candidates. Maximal degree in co-relation 59013. Up to 6790 conditions per place. [2024-06-20 15:34:01,149 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 201 changer transitions 0/482 dead transitions. [2024-06-20 15:34:01,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 482 transitions, 8209 flow [2024-06-20 15:34:01,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:34:01,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:34:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 15:34:01,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-20 15:34:01,150 INFO L175 Difference]: Start difference. First operand has 359 places, 457 transitions, 6097 flow. Second operand 8 states and 207 transitions. [2024-06-20 15:34:01,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 482 transitions, 8209 flow [2024-06-20 15:34:08,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 482 transitions, 7870 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 15:34:08,524 INFO L231 Difference]: Finished difference. Result has 364 places, 460 transitions, 6216 flow [2024-06-20 15:34:08,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5764, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6216, PETRI_PLACES=364, PETRI_TRANSITIONS=460} [2024-06-20 15:34:08,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-20 15:34:08,525 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 460 transitions, 6216 flow [2024-06-20 15:34:08,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:08,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:08,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:08,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:34:08,525 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:08,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:08,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1551478851, now seen corresponding path program 1 times [2024-06-20 15:34:08,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:08,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912179630] [2024-06-20 15:34:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:08,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:08,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:08,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912179630] [2024-06-20 15:34:08,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912179630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:08,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:08,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:34:08,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259822796] [2024-06-20 15:34:08,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:08,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:34:08,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:08,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:34:08,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:34:08,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:34:08,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 460 transitions, 6216 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:08,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:08,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:34:08,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:10,528 INFO L124 PetriNetUnfolderBase]: 4716/8110 cut-off events. [2024-06-20 15:34:10,528 INFO L125 PetriNetUnfolderBase]: For 1466468/1466468 co-relation queries the response was YES. [2024-06-20 15:34:10,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60079 conditions, 8110 events. 4716/8110 cut-off events. For 1466468/1466468 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 59131 event pairs, 1253 based on Foata normal form. 2/8093 useless extension candidates. Maximal degree in co-relation 59904. Up to 7151 conditions per place. [2024-06-20 15:34:10,642 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 388 selfloop transitions, 98 changer transitions 2/497 dead transitions. [2024-06-20 15:34:10,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 497 transitions, 7702 flow [2024-06-20 15:34:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:34:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:34:10,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-20 15:34:10,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-20 15:34:10,643 INFO L175 Difference]: Start difference. First operand has 364 places, 460 transitions, 6216 flow. Second operand 9 states and 232 transitions. [2024-06-20 15:34:10,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 497 transitions, 7702 flow [2024-06-20 15:34:16,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 497 transitions, 7282 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:34:16,701 INFO L231 Difference]: Finished difference. Result has 368 places, 464 transitions, 6166 flow [2024-06-20 15:34:16,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6166, PETRI_PLACES=368, PETRI_TRANSITIONS=464} [2024-06-20 15:34:16,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-20 15:34:16,701 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 464 transitions, 6166 flow [2024-06-20 15:34:16,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:16,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:16,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:16,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:34:16,702 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:16,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1554335811, now seen corresponding path program 2 times [2024-06-20 15:34:16,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:16,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099180107] [2024-06-20 15:34:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:16,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:16,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:16,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099180107] [2024-06-20 15:34:16,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099180107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:16,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:16,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:34:16,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86809183] [2024-06-20 15:34:16,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:16,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:34:16,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:16,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:34:16,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:34:16,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:34:16,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 464 transitions, 6166 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:16,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:16,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:34:16,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:18,498 INFO L124 PetriNetUnfolderBase]: 4711/8109 cut-off events. [2024-06-20 15:34:18,498 INFO L125 PetriNetUnfolderBase]: For 1469169/1469169 co-relation queries the response was YES. [2024-06-20 15:34:18,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59709 conditions, 8109 events. 4711/8109 cut-off events. For 1469169/1469169 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 59161 event pairs, 1268 based on Foata normal form. 2/8097 useless extension candidates. Maximal degree in co-relation 59532. Up to 7201 conditions per place. [2024-06-20 15:34:18,836 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 387 selfloop transitions, 93 changer transitions 0/489 dead transitions. [2024-06-20 15:34:18,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 489 transitions, 7188 flow [2024-06-20 15:34:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:34:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:34:18,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:34:18,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-20 15:34:18,837 INFO L175 Difference]: Start difference. First operand has 368 places, 464 transitions, 6166 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:34:18,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 489 transitions, 7188 flow [2024-06-20 15:34:25,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 489 transitions, 6886 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-20 15:34:25,113 INFO L231 Difference]: Finished difference. Result has 370 places, 464 transitions, 6055 flow [2024-06-20 15:34:25,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5864, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6055, PETRI_PLACES=370, PETRI_TRANSITIONS=464} [2024-06-20 15:34:25,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-20 15:34:25,114 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 464 transitions, 6055 flow [2024-06-20 15:34:25,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:25,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:25,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:25,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:34:25,115 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:25,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:25,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1297337277, now seen corresponding path program 3 times [2024-06-20 15:34:25,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:25,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758338522] [2024-06-20 15:34:25,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:25,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:25,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:25,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758338522] [2024-06-20 15:34:25,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758338522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:25,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:25,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:34:25,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592394397] [2024-06-20 15:34:25,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:25,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:34:25,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:25,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:34:25,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:34:25,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:34:25,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 464 transitions, 6055 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:25,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:25,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:34:25,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:26,899 INFO L124 PetriNetUnfolderBase]: 4719/8129 cut-off events. [2024-06-20 15:34:26,899 INFO L125 PetriNetUnfolderBase]: For 1488624/1488624 co-relation queries the response was YES. [2024-06-20 15:34:26,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59796 conditions, 8129 events. 4719/8129 cut-off events. For 1488624/1488624 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 59395 event pairs, 1276 based on Foata normal form. 2/8117 useless extension candidates. Maximal degree in co-relation 59618. Up to 7213 conditions per place. [2024-06-20 15:34:27,015 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 95 changer transitions 0/484 dead transitions. [2024-06-20 15:34:27,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 484 transitions, 7128 flow [2024-06-20 15:34:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:34:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:34:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:34:27,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-20 15:34:27,016 INFO L175 Difference]: Start difference. First operand has 370 places, 464 transitions, 6055 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:34:27,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 484 transitions, 7128 flow [2024-06-20 15:34:34,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 484 transitions, 6922 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:34:34,077 INFO L231 Difference]: Finished difference. Result has 370 places, 466 transitions, 6127 flow [2024-06-20 15:34:34,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6127, PETRI_PLACES=370, PETRI_TRANSITIONS=466} [2024-06-20 15:34:34,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-20 15:34:34,078 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 466 transitions, 6127 flow [2024-06-20 15:34:34,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:34,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:34,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:34,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:34:34,079 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:34,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:34,079 INFO L85 PathProgramCache]: Analyzing trace with hash -699896171, now seen corresponding path program 5 times [2024-06-20 15:34:34,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:34,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975477070] [2024-06-20 15:34:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:34,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:34,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:34,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975477070] [2024-06-20 15:34:34,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975477070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:34,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:34,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:34:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037944322] [2024-06-20 15:34:34,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:34,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:34:34,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:34,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:34:34,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:34:34,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:34:34,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 466 transitions, 6127 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:34,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:34,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:34:34,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:35,974 INFO L124 PetriNetUnfolderBase]: 4727/8128 cut-off events. [2024-06-20 15:34:35,975 INFO L125 PetriNetUnfolderBase]: For 1513215/1513215 co-relation queries the response was YES. [2024-06-20 15:34:36,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60168 conditions, 8128 events. 4727/8128 cut-off events. For 1513215/1513215 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59369 event pairs, 1260 based on Foata normal form. 2/8115 useless extension candidates. Maximal degree in co-relation 59989. Up to 7156 conditions per place. [2024-06-20 15:34:36,090 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 108 changer transitions 2/500 dead transitions. [2024-06-20 15:34:36,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 500 transitions, 7683 flow [2024-06-20 15:34:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:34:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:34:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-20 15:34:36,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6058201058201058 [2024-06-20 15:34:36,091 INFO L175 Difference]: Start difference. First operand has 370 places, 466 transitions, 6127 flow. Second operand 9 states and 229 transitions. [2024-06-20 15:34:36,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 500 transitions, 7683 flow [2024-06-20 15:34:43,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 500 transitions, 7428 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 15:34:43,223 INFO L231 Difference]: Finished difference. Result has 375 places, 470 transitions, 6326 flow [2024-06-20 15:34:43,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5872, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6326, PETRI_PLACES=375, PETRI_TRANSITIONS=470} [2024-06-20 15:34:43,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-20 15:34:43,224 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 470 transitions, 6326 flow [2024-06-20 15:34:43,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:43,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:43,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:43,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:34:43,225 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:43,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:43,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1430027685, now seen corresponding path program 6 times [2024-06-20 15:34:43,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:43,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003962626] [2024-06-20 15:34:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:43,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:43,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:43,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003962626] [2024-06-20 15:34:43,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003962626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:43,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:43,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:34:43,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166790783] [2024-06-20 15:34:43,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:43,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:34:43,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:43,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:34:43,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:34:43,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:34:43,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 470 transitions, 6326 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:43,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:43,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:34:43,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:45,237 INFO L124 PetriNetUnfolderBase]: 4722/8126 cut-off events. [2024-06-20 15:34:45,237 INFO L125 PetriNetUnfolderBase]: For 1515563/1515563 co-relation queries the response was YES. [2024-06-20 15:34:45,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59983 conditions, 8126 events. 4722/8126 cut-off events. For 1515563/1515563 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59296 event pairs, 1276 based on Foata normal form. 2/8122 useless extension candidates. Maximal degree in co-relation 59802. Up to 7206 conditions per place. [2024-06-20 15:34:45,354 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 103 changer transitions 0/492 dead transitions. [2024-06-20 15:34:45,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 492 transitions, 7346 flow [2024-06-20 15:34:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:34:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:34:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:34:45,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-20 15:34:45,356 INFO L175 Difference]: Start difference. First operand has 375 places, 470 transitions, 6326 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:34:45,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 492 transitions, 7346 flow [2024-06-20 15:34:51,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 492 transitions, 7027 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-20 15:34:51,674 INFO L231 Difference]: Finished difference. Result has 378 places, 470 transitions, 6218 flow [2024-06-20 15:34:51,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6007, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6218, PETRI_PLACES=378, PETRI_TRANSITIONS=470} [2024-06-20 15:34:51,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-20 15:34:51,674 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 470 transitions, 6218 flow [2024-06-20 15:34:51,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:51,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:34:51,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:34:51,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:34:51,675 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:34:51,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:34:51,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1547237097, now seen corresponding path program 10 times [2024-06-20 15:34:51,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:34:51,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839321121] [2024-06-20 15:34:51,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:34:51,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:34:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:34:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:34:51,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:34:51,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839321121] [2024-06-20 15:34:51,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839321121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:34:51,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:34:51,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:34:51,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616752704] [2024-06-20 15:34:51,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:34:51,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:34:51,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:34:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:34:51,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:34:51,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:34:51,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 470 transitions, 6218 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:34:51,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:34:51,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:34:51,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:34:53,629 INFO L124 PetriNetUnfolderBase]: 4727/8133 cut-off events. [2024-06-20 15:34:53,629 INFO L125 PetriNetUnfolderBase]: For 1522264/1522264 co-relation queries the response was YES. [2024-06-20 15:34:53,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60085 conditions, 8133 events. 4727/8133 cut-off events. For 1522264/1522264 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 59401 event pairs, 1304 based on Foata normal form. 1/8128 useless extension candidates. Maximal degree in co-relation 59902. Up to 6835 conditions per place. [2024-06-20 15:34:53,741 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 166 changer transitions 0/499 dead transitions. [2024-06-20 15:34:53,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 499 transitions, 7871 flow [2024-06-20 15:34:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:34:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:34:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 15:34:53,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2024-06-20 15:34:53,742 INFO L175 Difference]: Start difference. First operand has 378 places, 470 transitions, 6218 flow. Second operand 8 states and 213 transitions. [2024-06-20 15:34:53,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 499 transitions, 7871 flow [2024-06-20 15:35:01,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 499 transitions, 7643 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:35:01,522 INFO L231 Difference]: Finished difference. Result has 379 places, 473 transitions, 6383 flow [2024-06-20 15:35:01,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6383, PETRI_PLACES=379, PETRI_TRANSITIONS=473} [2024-06-20 15:35:01,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-20 15:35:01,523 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 473 transitions, 6383 flow [2024-06-20 15:35:01,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:35:01,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:35:01,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:35:01,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:35:01,523 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:35:01,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:35:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash -137327609, now seen corresponding path program 11 times [2024-06-20 15:35:01,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:35:01,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284941370] [2024-06-20 15:35:01,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:35:01,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:35:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:35:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:35:01,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:35:01,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284941370] [2024-06-20 15:35:01,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284941370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:35:01,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:35:01,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:35:01,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473316263] [2024-06-20 15:35:01,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:35:01,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:35:01,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:35:01,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:35:01,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:35:01,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:35:01,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 473 transitions, 6383 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:35:01,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:35:01,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:35:01,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:35:03,298 INFO L124 PetriNetUnfolderBase]: 4740/8157 cut-off events. [2024-06-20 15:35:03,298 INFO L125 PetriNetUnfolderBase]: For 1554710/1554710 co-relation queries the response was YES. [2024-06-20 15:35:03,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60734 conditions, 8157 events. 4740/8157 cut-off events. For 1554710/1554710 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59604 event pairs, 1305 based on Foata normal form. 1/8152 useless extension candidates. Maximal degree in co-relation 60550. Up to 6845 conditions per place. [2024-06-20 15:35:03,410 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 173 changer transitions 0/503 dead transitions. [2024-06-20 15:35:03,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 503 transitions, 8371 flow [2024-06-20 15:35:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:35:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:35:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 15:35:03,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-20 15:35:03,411 INFO L175 Difference]: Start difference. First operand has 379 places, 473 transitions, 6383 flow. Second operand 8 states and 211 transitions. [2024-06-20 15:35:03,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 503 transitions, 8371 flow [2024-06-20 15:35:10,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 503 transitions, 8108 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:35:10,595 INFO L231 Difference]: Finished difference. Result has 383 places, 479 transitions, 6590 flow [2024-06-20 15:35:10,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6124, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6590, PETRI_PLACES=383, PETRI_TRANSITIONS=479} [2024-06-20 15:35:10,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-20 15:35:10,596 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 479 transitions, 6590 flow [2024-06-20 15:35:10,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:35:10,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:35:10,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:35:10,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:35:10,596 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:35:10,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:35:10,597 INFO L85 PathProgramCache]: Analyzing trace with hash 226220623, now seen corresponding path program 12 times [2024-06-20 15:35:10,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:35:10,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953794835] [2024-06-20 15:35:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:35:10,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:35:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:35:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:35:10,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:35:10,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953794835] [2024-06-20 15:35:10,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953794835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:35:10,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:35:10,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:35:10,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173547890] [2024-06-20 15:35:10,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:35:10,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:35:10,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:35:10,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:35:10,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:35:10,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:35:10,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 479 transitions, 6590 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:35:10,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:35:10,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:35:10,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:35:12,381 INFO L124 PetriNetUnfolderBase]: 4737/8153 cut-off events. [2024-06-20 15:35:12,381 INFO L125 PetriNetUnfolderBase]: For 1567824/1567824 co-relation queries the response was YES. [2024-06-20 15:35:12,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60755 conditions, 8153 events. 4737/8153 cut-off events. For 1567824/1567824 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59601 event pairs, 1308 based on Foata normal form. 1/8148 useless extension candidates. Maximal degree in co-relation 60568. Up to 6843 conditions per place. [2024-06-20 15:35:12,522 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 325 selfloop transitions, 171 changer transitions 0/505 dead transitions. [2024-06-20 15:35:12,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 505 transitions, 8210 flow [2024-06-20 15:35:12,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:35:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:35:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-20 15:35:12,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-20 15:35:12,523 INFO L175 Difference]: Start difference. First operand has 383 places, 479 transitions, 6590 flow. Second operand 8 states and 212 transitions. [2024-06-20 15:35:12,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 505 transitions, 8210 flow [2024-06-20 15:35:21,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 505 transitions, 7943 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 15:35:21,178 INFO L231 Difference]: Finished difference. Result has 387 places, 479 transitions, 6671 flow [2024-06-20 15:35:21,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6671, PETRI_PLACES=387, PETRI_TRANSITIONS=479} [2024-06-20 15:35:21,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-20 15:35:21,178 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 479 transitions, 6671 flow [2024-06-20 15:35:21,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:35:21,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:35:21,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:35:21,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:35:21,179 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:35:21,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:35:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash -491746391, now seen corresponding path program 13 times [2024-06-20 15:35:21,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:35:21,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366891299] [2024-06-20 15:35:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:35:21,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:35:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:35:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:35:21,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:35:21,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366891299] [2024-06-20 15:35:21,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366891299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:35:21,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:35:21,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:35:21,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550988705] [2024-06-20 15:35:21,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:35:21,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:35:21,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:35:21,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:35:21,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:35:21,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:35:21,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 479 transitions, 6671 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:35:21,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:35:21,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:35:21,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:35:22,961 INFO L124 PetriNetUnfolderBase]: 4734/8157 cut-off events. [2024-06-20 15:35:22,961 INFO L125 PetriNetUnfolderBase]: For 1579845/1579845 co-relation queries the response was YES. [2024-06-20 15:35:23,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60773 conditions, 8157 events. 4734/8157 cut-off events. For 1579845/1579845 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59678 event pairs, 1312 based on Foata normal form. 1/8152 useless extension candidates. Maximal degree in co-relation 60584. Up to 6841 conditions per place. [2024-06-20 15:35:23,085 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 175 changer transitions 0/503 dead transitions. [2024-06-20 15:35:23,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 503 transitions, 8569 flow [2024-06-20 15:35:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:35:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:35:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-20 15:35:23,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:35:23,086 INFO L175 Difference]: Start difference. First operand has 387 places, 479 transitions, 6671 flow. Second operand 8 states and 210 transitions. [2024-06-20 15:35:23,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 503 transitions, 8569 flow [2024-06-20 15:35:30,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 503 transitions, 8110 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 15:35:30,365 INFO L231 Difference]: Finished difference. Result has 387 places, 479 transitions, 6568 flow [2024-06-20 15:35:30,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6212, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6568, PETRI_PLACES=387, PETRI_TRANSITIONS=479} [2024-06-20 15:35:30,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-20 15:35:30,366 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 479 transitions, 6568 flow [2024-06-20 15:35:30,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:35:30,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:35:30,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:35:30,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:35:30,367 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:35:30,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:35:30,367 INFO L85 PathProgramCache]: Analyzing trace with hash 154504309, now seen corresponding path program 14 times [2024-06-20 15:35:30,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:35:30,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6093741] [2024-06-20 15:35:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:35:30,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:35:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:35:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:35:30,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:35:30,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6093741] [2024-06-20 15:35:30,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6093741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:35:30,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:35:30,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:35:30,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399678422] [2024-06-20 15:35:30,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:35:30,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:35:30,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:35:30,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:35:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:35:30,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:35:30,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 479 transitions, 6568 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:35:30,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:35:30,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:35:30,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:35:32,195 INFO L124 PetriNetUnfolderBase]: 4731/8153 cut-off events. [2024-06-20 15:35:32,195 INFO L125 PetriNetUnfolderBase]: For 1589511/1589511 co-relation queries the response was YES. [2024-06-20 15:35:32,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60706 conditions, 8153 events. 4731/8153 cut-off events. For 1589511/1589511 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59600 event pairs, 1316 based on Foata normal form. 1/8148 useless extension candidates. Maximal degree in co-relation 60517. Up to 6839 conditions per place. [2024-06-20 15:35:32,498 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 318 selfloop transitions, 178 changer transitions 0/505 dead transitions. [2024-06-20 15:35:32,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 505 transitions, 8196 flow [2024-06-20 15:35:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:35:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:35:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 15:35:32,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-20 15:35:32,513 INFO L175 Difference]: Start difference. First operand has 387 places, 479 transitions, 6568 flow. Second operand 8 states and 211 transitions. [2024-06-20 15:35:32,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 505 transitions, 8196 flow [2024-06-20 15:35:41,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 505 transitions, 7842 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:35:41,689 INFO L231 Difference]: Finished difference. Result has 389 places, 479 transitions, 6576 flow [2024-06-20 15:35:41,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6214, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6576, PETRI_PLACES=389, PETRI_TRANSITIONS=479} [2024-06-20 15:35:41,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-20 15:35:41,690 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 479 transitions, 6576 flow [2024-06-20 15:35:41,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:35:41,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:35:41,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:35:41,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:35:41,690 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:35:41,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:35:41,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1497597827, now seen corresponding path program 15 times [2024-06-20 15:35:41,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:35:41,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866709574] [2024-06-20 15:35:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:35:41,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:35:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:35:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:35:41,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:35:41,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866709574] [2024-06-20 15:35:41,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866709574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:35:41,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:35:41,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:35:41,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171181299] [2024-06-20 15:35:41,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:35:41,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:35:41,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:35:41,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:35:41,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:35:41,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:35:41,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 479 transitions, 6576 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:35:41,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:35:41,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:35:41,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:35:43,551 INFO L124 PetriNetUnfolderBase]: 4752/8176 cut-off events. [2024-06-20 15:35:43,551 INFO L125 PetriNetUnfolderBase]: For 1633773/1633773 co-relation queries the response was YES. [2024-06-20 15:35:43,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61402 conditions, 8176 events. 4752/8176 cut-off events. For 1633773/1633773 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59772 event pairs, 1291 based on Foata normal form. 1/8171 useless extension candidates. Maximal degree in co-relation 61211. Up to 6861 conditions per place. [2024-06-20 15:35:43,894 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 314 selfloop transitions, 190 changer transitions 0/513 dead transitions. [2024-06-20 15:35:43,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 513 transitions, 8934 flow [2024-06-20 15:35:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:35:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:35:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-20 15:35:43,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-20 15:35:43,895 INFO L175 Difference]: Start difference. First operand has 389 places, 479 transitions, 6576 flow. Second operand 10 states and 256 transitions. [2024-06-20 15:35:43,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 513 transitions, 8934 flow [2024-06-20 15:35:50,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 513 transitions, 8528 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 15:35:50,948 INFO L231 Difference]: Finished difference. Result has 392 places, 486 transitions, 6701 flow [2024-06-20 15:35:50,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6182, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6701, PETRI_PLACES=392, PETRI_TRANSITIONS=486} [2024-06-20 15:35:50,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-20 15:35:50,949 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 486 transitions, 6701 flow [2024-06-20 15:35:50,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:35:50,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:35:50,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:35:50,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:35:50,949 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:35:50,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:35:50,950 INFO L85 PathProgramCache]: Analyzing trace with hash 538617559, now seen corresponding path program 16 times [2024-06-20 15:35:50,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:35:50,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674049814] [2024-06-20 15:35:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:35:50,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:35:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:35:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:35:51,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:35:51,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674049814] [2024-06-20 15:35:51,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674049814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:35:51,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:35:51,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:35:51,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659136621] [2024-06-20 15:35:51,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:35:51,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:35:51,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:35:51,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:35:51,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:35:51,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:35:51,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 486 transitions, 6701 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:35:51,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:35:51,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:35:51,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:35:53,263 INFO L124 PetriNetUnfolderBase]: 4746/8180 cut-off events. [2024-06-20 15:35:53,264 INFO L125 PetriNetUnfolderBase]: For 1644306/1644306 co-relation queries the response was YES. [2024-06-20 15:35:53,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61211 conditions, 8180 events. 4746/8180 cut-off events. For 1644306/1644306 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59838 event pairs, 1301 based on Foata normal form. 2/8176 useless extension candidates. Maximal degree in co-relation 61019. Up to 6856 conditions per place. [2024-06-20 15:35:53,377 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 314 selfloop transitions, 184 changer transitions 0/507 dead transitions. [2024-06-20 15:35:53,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 507 transitions, 8617 flow [2024-06-20 15:35:53,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:35:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:35:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 15:35:53,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2024-06-20 15:35:53,378 INFO L175 Difference]: Start difference. First operand has 392 places, 486 transitions, 6701 flow. Second operand 8 states and 209 transitions. [2024-06-20 15:35:53,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 507 transitions, 8617 flow [2024-06-20 15:36:00,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 507 transitions, 8225 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 15:36:00,920 INFO L231 Difference]: Finished difference. Result has 393 places, 486 transitions, 6684 flow [2024-06-20 15:36:00,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6684, PETRI_PLACES=393, PETRI_TRANSITIONS=486} [2024-06-20 15:36:00,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-20 15:36:00,921 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 486 transitions, 6684 flow [2024-06-20 15:36:00,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:00,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:00,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:36:00,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:36:00,921 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:00,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:00,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1187260649, now seen corresponding path program 17 times [2024-06-20 15:36:00,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:00,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214436403] [2024-06-20 15:36:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:00,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:01,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:01,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214436403] [2024-06-20 15:36:01,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214436403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:01,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:01,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:36:01,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68097413] [2024-06-20 15:36:01,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:01,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:36:01,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:01,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:36:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:36:01,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:36:01,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 486 transitions, 6684 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:01,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:01,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:36:01,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:02,933 INFO L124 PetriNetUnfolderBase]: 4756/8147 cut-off events. [2024-06-20 15:36:02,934 INFO L125 PetriNetUnfolderBase]: For 1669414/1669414 co-relation queries the response was YES. [2024-06-20 15:36:03,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61387 conditions, 8147 events. 4756/8147 cut-off events. For 1669414/1669414 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 59429 event pairs, 1360 based on Foata normal form. 2/8120 useless extension candidates. Maximal degree in co-relation 61193. Up to 6866 conditions per place. [2024-06-20 15:36:03,054 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 184 changer transitions 0/504 dead transitions. [2024-06-20 15:36:03,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 504 transitions, 8667 flow [2024-06-20 15:36:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:36:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:36:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:36:03,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:36:03,055 INFO L175 Difference]: Start difference. First operand has 393 places, 486 transitions, 6684 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:36:03,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 504 transitions, 8667 flow [2024-06-20 15:36:12,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 504 transitions, 8283 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:36:12,902 INFO L231 Difference]: Finished difference. Result has 393 places, 490 transitions, 6760 flow [2024-06-20 15:36:12,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6306, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6760, PETRI_PLACES=393, PETRI_TRANSITIONS=490} [2024-06-20 15:36:12,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-20 15:36:12,903 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 490 transitions, 6760 flow [2024-06-20 15:36:12,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:12,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:12,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:36:12,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:36:12,903 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:12,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash 862542325, now seen corresponding path program 18 times [2024-06-20 15:36:12,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:12,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681929737] [2024-06-20 15:36:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:12,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:12,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:12,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681929737] [2024-06-20 15:36:12,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681929737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:12,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:12,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:36:12,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000550998] [2024-06-20 15:36:12,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:12,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:36:12,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:12,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:36:12,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:36:13,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:36:13,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 490 transitions, 6760 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:13,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:13,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:36:13,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:14,897 INFO L124 PetriNetUnfolderBase]: 4766/8165 cut-off events. [2024-06-20 15:36:14,898 INFO L125 PetriNetUnfolderBase]: For 1691677/1691677 co-relation queries the response was YES. [2024-06-20 15:36:14,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61633 conditions, 8165 events. 4766/8165 cut-off events. For 1691677/1691677 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59602 event pairs, 1360 based on Foata normal form. 2/8138 useless extension candidates. Maximal degree in co-relation 61438. Up to 6876 conditions per place. [2024-06-20 15:36:15,019 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 186 changer transitions 0/508 dead transitions. [2024-06-20 15:36:15,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 508 transitions, 8759 flow [2024-06-20 15:36:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:36:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:36:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:36:15,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:36:15,021 INFO L175 Difference]: Start difference. First operand has 393 places, 490 transitions, 6760 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:36:15,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 508 transitions, 8759 flow [2024-06-20 15:36:23,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 508 transitions, 8092 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 15:36:23,052 INFO L231 Difference]: Finished difference. Result has 394 places, 494 transitions, 6559 flow [2024-06-20 15:36:23,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6127, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6559, PETRI_PLACES=394, PETRI_TRANSITIONS=494} [2024-06-20 15:36:23,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-20 15:36:23,053 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 494 transitions, 6559 flow [2024-06-20 15:36:23,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:23,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:23,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:36:23,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:36:23,054 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:23,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:23,054 INFO L85 PathProgramCache]: Analyzing trace with hash 509223413, now seen corresponding path program 19 times [2024-06-20 15:36:23,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:23,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358731076] [2024-06-20 15:36:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:23,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:23,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:23,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358731076] [2024-06-20 15:36:23,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358731076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:23,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:23,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:36:23,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823376709] [2024-06-20 15:36:23,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:23,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:36:23,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:23,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:36:23,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:36:23,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:36:23,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 494 transitions, 6559 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:23,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:23,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:36:23,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:24,912 INFO L124 PetriNetUnfolderBase]: 4760/8165 cut-off events. [2024-06-20 15:36:24,912 INFO L125 PetriNetUnfolderBase]: For 1687220/1687220 co-relation queries the response was YES. [2024-06-20 15:36:25,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61283 conditions, 8165 events. 4760/8165 cut-off events. For 1687220/1687220 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59673 event pairs, 1368 based on Foata normal form. 2/8138 useless extension candidates. Maximal degree in co-relation 61088. Up to 6871 conditions per place. [2024-06-20 15:36:25,041 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 186 changer transitions 0/508 dead transitions. [2024-06-20 15:36:25,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 508 transitions, 8477 flow [2024-06-20 15:36:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:36:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:36:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:36:25,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-20 15:36:25,042 INFO L175 Difference]: Start difference. First operand has 394 places, 494 transitions, 6559 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:36:25,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 508 transitions, 8477 flow [2024-06-20 15:36:33,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 508 transitions, 8120 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:36:33,862 INFO L231 Difference]: Finished difference. Result has 397 places, 494 transitions, 6581 flow [2024-06-20 15:36:33,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6202, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6581, PETRI_PLACES=397, PETRI_TRANSITIONS=494} [2024-06-20 15:36:33,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-20 15:36:33,863 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 494 transitions, 6581 flow [2024-06-20 15:36:33,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:33,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:33,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:36:33,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:36:33,863 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:33,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:33,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1326860125, now seen corresponding path program 7 times [2024-06-20 15:36:33,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:33,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832362885] [2024-06-20 15:36:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:33,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:33,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:33,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832362885] [2024-06-20 15:36:33,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832362885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:33,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:33,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:36:33,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445230197] [2024-06-20 15:36:33,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:33,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:36:33,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:33,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:36:33,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:36:34,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:36:34,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 494 transitions, 6581 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:34,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:34,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:36:34,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:35,748 INFO L124 PetriNetUnfolderBase]: 4796/8237 cut-off events. [2024-06-20 15:36:35,748 INFO L125 PetriNetUnfolderBase]: For 1804859/1804859 co-relation queries the response was YES. [2024-06-20 15:36:35,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62145 conditions, 8237 events. 4796/8237 cut-off events. For 1804859/1804859 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 60347 event pairs, 1303 based on Foata normal form. 10/8233 useless extension candidates. Maximal degree in co-relation 61949. Up to 7284 conditions per place. [2024-06-20 15:36:35,864 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 102 changer transitions 0/512 dead transitions. [2024-06-20 15:36:35,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 512 transitions, 7751 flow [2024-06-20 15:36:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:36:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:36:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:36:35,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-20 15:36:35,865 INFO L175 Difference]: Start difference. First operand has 397 places, 494 transitions, 6581 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:36:35,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 512 transitions, 7751 flow [2024-06-20 15:36:44,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 512 transitions, 7286 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 15:36:44,910 INFO L231 Difference]: Finished difference. Result has 397 places, 496 transitions, 6444 flow [2024-06-20 15:36:44,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6116, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6444, PETRI_PLACES=397, PETRI_TRANSITIONS=496} [2024-06-20 15:36:44,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-20 15:36:44,911 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 496 transitions, 6444 flow [2024-06-20 15:36:44,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:44,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:44,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:36:44,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:36:44,911 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:44,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:44,912 INFO L85 PathProgramCache]: Analyzing trace with hash 277623653, now seen corresponding path program 8 times [2024-06-20 15:36:44,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:44,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193389901] [2024-06-20 15:36:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:44,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:45,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:45,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193389901] [2024-06-20 15:36:45,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193389901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:45,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:45,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:36:45,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053627266] [2024-06-20 15:36:45,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:45,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:36:45,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:45,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:36:45,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:36:45,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:36:45,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 496 transitions, 6444 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:45,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:45,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:36:45,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:46,988 INFO L124 PetriNetUnfolderBase]: 4819/8286 cut-off events. [2024-06-20 15:36:46,988 INFO L125 PetriNetUnfolderBase]: For 1806101/1806101 co-relation queries the response was YES. [2024-06-20 15:36:47,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62126 conditions, 8286 events. 4819/8286 cut-off events. For 1806101/1806101 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60899 event pairs, 1298 based on Foata normal form. 10/8282 useless extension candidates. Maximal degree in co-relation 61931. Up to 7193 conditions per place. [2024-06-20 15:36:47,105 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 107 changer transitions 0/519 dead transitions. [2024-06-20 15:36:47,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 519 transitions, 7656 flow [2024-06-20 15:36:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:36:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:36:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 15:36:47,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-20 15:36:47,107 INFO L175 Difference]: Start difference. First operand has 397 places, 496 transitions, 6444 flow. Second operand 9 states and 222 transitions. [2024-06-20 15:36:47,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 519 transitions, 7656 flow [2024-06-20 15:36:54,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 519 transitions, 7358 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-20 15:36:54,603 INFO L231 Difference]: Finished difference. Result has 400 places, 498 transitions, 6487 flow [2024-06-20 15:36:54,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6146, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6487, PETRI_PLACES=400, PETRI_TRANSITIONS=498} [2024-06-20 15:36:54,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-20 15:36:54,603 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 498 transitions, 6487 flow [2024-06-20 15:36:54,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:54,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:36:54,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:36:54,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 15:36:54,604 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:36:54,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:36:54,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1503976565, now seen corresponding path program 20 times [2024-06-20 15:36:54,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:36:54,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468386569] [2024-06-20 15:36:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:36:54,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:36:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:36:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:36:54,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:36:54,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468386569] [2024-06-20 15:36:54,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468386569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:36:54,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:36:54,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:36:54,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379177908] [2024-06-20 15:36:54,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:36:54,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:36:54,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:36:54,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:36:54,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:36:54,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:36:54,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 498 transitions, 6487 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:36:54,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:36:54,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:36:54,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:36:56,746 INFO L124 PetriNetUnfolderBase]: 4813/8262 cut-off events. [2024-06-20 15:36:56,746 INFO L125 PetriNetUnfolderBase]: For 1712991/1712991 co-relation queries the response was YES. [2024-06-20 15:36:56,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61554 conditions, 8262 events. 4813/8262 cut-off events. For 1712991/1712991 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60670 event pairs, 1375 based on Foata normal form. 2/8237 useless extension candidates. Maximal degree in co-relation 61358. Up to 6959 conditions per place. [2024-06-20 15:36:56,870 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 190 changer transitions 0/512 dead transitions. [2024-06-20 15:36:56,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 512 transitions, 8129 flow [2024-06-20 15:36:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:36:56,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:36:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:36:56,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-20 15:36:56,871 INFO L175 Difference]: Start difference. First operand has 400 places, 498 transitions, 6487 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:36:56,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 512 transitions, 8129 flow [2024-06-20 15:37:06,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 512 transitions, 7810 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-20 15:37:06,227 INFO L231 Difference]: Finished difference. Result has 401 places, 498 transitions, 6555 flow [2024-06-20 15:37:06,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6168, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6555, PETRI_PLACES=401, PETRI_TRANSITIONS=498} [2024-06-20 15:37:06,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-20 15:37:06,228 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 498 transitions, 6555 flow [2024-06-20 15:37:06,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:06,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:37:06,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:37:06,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 15:37:06,229 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:37:06,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:37:06,229 INFO L85 PathProgramCache]: Analyzing trace with hash 72995885, now seen corresponding path program 4 times [2024-06-20 15:37:06,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:37:06,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974285233] [2024-06-20 15:37:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:37:06,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:37:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:37:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:37:06,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:37:06,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974285233] [2024-06-20 15:37:06,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974285233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:37:06,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:37:06,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:37:06,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732171570] [2024-06-20 15:37:06,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:37:06,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:37:06,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:37:06,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:37:06,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:37:06,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:37:06,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 498 transitions, 6555 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:06,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:37:06,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:37:06,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:37:08,285 INFO L124 PetriNetUnfolderBase]: 4834/8327 cut-off events. [2024-06-20 15:37:08,285 INFO L125 PetriNetUnfolderBase]: For 1753448/1753448 co-relation queries the response was YES. [2024-06-20 15:37:08,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62187 conditions, 8327 events. 4834/8327 cut-off events. For 1753448/1753448 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61137 event pairs, 1271 based on Foata normal form. 2/8324 useless extension candidates. Maximal degree in co-relation 61990. Up to 7331 conditions per place. [2024-06-20 15:37:08,419 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 88 changer transitions 2/532 dead transitions. [2024-06-20 15:37:08,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 532 transitions, 8147 flow [2024-06-20 15:37:08,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:37:08,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:37:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-20 15:37:08,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-06-20 15:37:08,427 INFO L175 Difference]: Start difference. First operand has 401 places, 498 transitions, 6555 flow. Second operand 9 states and 230 transitions. [2024-06-20 15:37:08,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 532 transitions, 8147 flow [2024-06-20 15:37:18,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 532 transitions, 7683 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 15:37:18,790 INFO L231 Difference]: Finished difference. Result has 403 places, 502 transitions, 6449 flow [2024-06-20 15:37:18,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6091, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6449, PETRI_PLACES=403, PETRI_TRANSITIONS=502} [2024-06-20 15:37:18,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-20 15:37:18,791 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 502 transitions, 6449 flow [2024-06-20 15:37:18,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:18,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:37:18,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:37:18,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 15:37:18,804 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:37:18,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:37:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash -636742265, now seen corresponding path program 5 times [2024-06-20 15:37:18,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:37:18,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624928084] [2024-06-20 15:37:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:37:18,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:37:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:37:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:37:18,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:37:18,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624928084] [2024-06-20 15:37:18,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624928084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:37:18,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:37:18,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:37:18,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819347146] [2024-06-20 15:37:18,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:37:18,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:37:18,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:37:18,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:37:18,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:37:19,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:37:19,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 502 transitions, 6449 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:19,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:37:19,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:37:19,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:37:20,974 INFO L124 PetriNetUnfolderBase]: 4829/8330 cut-off events. [2024-06-20 15:37:20,974 INFO L125 PetriNetUnfolderBase]: For 1751443/1751443 co-relation queries the response was YES. [2024-06-20 15:37:21,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61700 conditions, 8330 events. 4829/8330 cut-off events. For 1751443/1751443 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61260 event pairs, 1290 based on Foata normal form. 2/8328 useless extension candidates. Maximal degree in co-relation 61500. Up to 7381 conditions per place. [2024-06-20 15:37:21,092 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 83 changer transitions 0/524 dead transitions. [2024-06-20 15:37:21,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 524 transitions, 7533 flow [2024-06-20 15:37:21,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:37:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:37:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:37:21,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-20 15:37:21,094 INFO L175 Difference]: Start difference. First operand has 403 places, 502 transitions, 6449 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:37:21,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 524 transitions, 7533 flow [2024-06-20 15:37:29,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 524 transitions, 7243 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-20 15:37:29,865 INFO L231 Difference]: Finished difference. Result has 405 places, 502 transitions, 6330 flow [2024-06-20 15:37:29,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6330, PETRI_PLACES=405, PETRI_TRANSITIONS=502} [2024-06-20 15:37:29,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-20 15:37:29,866 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 502 transitions, 6330 flow [2024-06-20 15:37:29,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:29,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:37:29,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:37:29,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 15:37:29,866 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:37:29,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:37:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash 163084117, now seen corresponding path program 6 times [2024-06-20 15:37:29,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:37:29,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703164329] [2024-06-20 15:37:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:37:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:37:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:37:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:37:29,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:37:29,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703164329] [2024-06-20 15:37:29,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703164329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:37:29,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:37:29,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:37:29,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868234761] [2024-06-20 15:37:29,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:37:29,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:37:29,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:37:29,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:37:29,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:37:29,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:37:29,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 502 transitions, 6330 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:29,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:37:29,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:37:29,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:37:32,001 INFO L124 PetriNetUnfolderBase]: 4896/8443 cut-off events. [2024-06-20 15:37:32,001 INFO L125 PetriNetUnfolderBase]: For 1894389/1894389 co-relation queries the response was YES. [2024-06-20 15:37:32,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64169 conditions, 8443 events. 4896/8443 cut-off events. For 1894389/1894389 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 62234 event pairs, 1302 based on Foata normal form. 2/8440 useless extension candidates. Maximal degree in co-relation 63968. Up to 7395 conditions per place. [2024-06-20 15:37:32,131 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 439 selfloop transitions, 90 changer transitions 0/538 dead transitions. [2024-06-20 15:37:32,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 538 transitions, 7956 flow [2024-06-20 15:37:32,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:37:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:37:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-20 15:37:32,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023809523809524 [2024-06-20 15:37:32,132 INFO L175 Difference]: Start difference. First operand has 405 places, 502 transitions, 6330 flow. Second operand 10 states and 253 transitions. [2024-06-20 15:37:32,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 538 transitions, 7956 flow [2024-06-20 15:37:42,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 538 transitions, 7770 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:37:42,249 INFO L231 Difference]: Finished difference. Result has 409 places, 506 transitions, 6516 flow [2024-06-20 15:37:42,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6516, PETRI_PLACES=409, PETRI_TRANSITIONS=506} [2024-06-20 15:37:42,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-20 15:37:42,249 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 506 transitions, 6516 flow [2024-06-20 15:37:42,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:42,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:37:42,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:37:42,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 15:37:42,250 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:37:42,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:37:42,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1297886105, now seen corresponding path program 7 times [2024-06-20 15:37:42,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:37:42,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221200127] [2024-06-20 15:37:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:37:42,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:37:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:37:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:37:42,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:37:42,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221200127] [2024-06-20 15:37:42,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221200127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:37:42,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:37:42,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:37:42,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906392654] [2024-06-20 15:37:42,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:37:42,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:37:42,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:37:42,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:37:42,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:37:42,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:37:42,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 506 transitions, 6516 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:42,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:37:42,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:37:42,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:37:44,436 INFO L124 PetriNetUnfolderBase]: 4904/8463 cut-off events. [2024-06-20 15:37:44,436 INFO L125 PetriNetUnfolderBase]: For 1920766/1920766 co-relation queries the response was YES. [2024-06-20 15:37:44,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64704 conditions, 8463 events. 4904/8463 cut-off events. For 1920766/1920766 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 62491 event pairs, 1312 based on Foata normal form. 2/8461 useless extension candidates. Maximal degree in co-relation 64501. Up to 7494 conditions per place. [2024-06-20 15:37:44,573 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 85 changer transitions 0/532 dead transitions. [2024-06-20 15:37:44,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 532 transitions, 7713 flow [2024-06-20 15:37:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:37:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:37:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-20 15:37:44,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:37:44,575 INFO L175 Difference]: Start difference. First operand has 409 places, 506 transitions, 6516 flow. Second operand 10 states and 245 transitions. [2024-06-20 15:37:44,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 532 transitions, 7713 flow [2024-06-20 15:37:54,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 532 transitions, 7451 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 15:37:54,131 INFO L231 Difference]: Finished difference. Result has 412 places, 508 transitions, 6526 flow [2024-06-20 15:37:54,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6526, PETRI_PLACES=412, PETRI_TRANSITIONS=508} [2024-06-20 15:37:54,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-20 15:37:54,132 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 508 transitions, 6526 flow [2024-06-20 15:37:54,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:54,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:37:54,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:37:54,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 15:37:54,133 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:37:54,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:37:54,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1640124245, now seen corresponding path program 8 times [2024-06-20 15:37:54,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:37:54,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737484003] [2024-06-20 15:37:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:37:54,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:37:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:37:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:37:54,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:37:54,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737484003] [2024-06-20 15:37:54,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737484003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:37:54,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:37:54,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:37:54,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123642839] [2024-06-20 15:37:54,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:37:54,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:37:54,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:37:54,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:37:54,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:37:54,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:37:54,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 508 transitions, 6526 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:37:54,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:37:54,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:37:54,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:37:56,402 INFO L124 PetriNetUnfolderBase]: 4912/8479 cut-off events. [2024-06-20 15:37:56,402 INFO L125 PetriNetUnfolderBase]: For 1944067/1944067 co-relation queries the response was YES. [2024-06-20 15:37:56,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64809 conditions, 8479 events. 4912/8479 cut-off events. For 1944067/1944067 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62671 event pairs, 1118 based on Foata normal form. 2/8477 useless extension candidates. Maximal degree in co-relation 64605. Up to 6669 conditions per place. [2024-06-20 15:37:56,738 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 109 changer transitions 0/546 dead transitions. [2024-06-20 15:37:56,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 546 transitions, 8423 flow [2024-06-20 15:37:56,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:37:56,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:37:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-20 15:37:56,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-20 15:37:56,740 INFO L175 Difference]: Start difference. First operand has 412 places, 508 transitions, 6526 flow. Second operand 9 states and 237 transitions. [2024-06-20 15:37:56,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 546 transitions, 8423 flow [2024-06-20 15:38:07,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 546 transitions, 8190 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-20 15:38:07,422 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 6603 flow [2024-06-20 15:38:07,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6293, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6603, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-20 15:38:07,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-20 15:38:07,422 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 6603 flow [2024-06-20 15:38:07,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:07,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:38:07,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:38:07,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 15:38:07,423 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:38:07,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:38:07,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1189266169, now seen corresponding path program 9 times [2024-06-20 15:38:07,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:38:07,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480253498] [2024-06-20 15:38:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:38:07,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:38:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:38:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:38:07,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:38:07,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480253498] [2024-06-20 15:38:07,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480253498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:38:07,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:38:07,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:38:07,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323172002] [2024-06-20 15:38:07,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:38:07,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:38:07,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:38:07,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:38:07,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:38:07,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:38:07,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 6603 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:07,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:38:07,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:38:07,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:38:09,626 INFO L124 PetriNetUnfolderBase]: 4887/8432 cut-off events. [2024-06-20 15:38:09,627 INFO L125 PetriNetUnfolderBase]: For 1944397/1944397 co-relation queries the response was YES. [2024-06-20 15:38:09,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63628 conditions, 8432 events. 4887/8432 cut-off events. For 1944397/1944397 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62229 event pairs, 1129 based on Foata normal form. 8/8436 useless extension candidates. Maximal degree in co-relation 63423. Up to 6655 conditions per place. [2024-06-20 15:38:09,760 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 106 changer transitions 0/543 dead transitions. [2024-06-20 15:38:09,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 543 transitions, 8091 flow [2024-06-20 15:38:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:38:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:38:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-20 15:38:09,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:38:09,761 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 6603 flow. Second operand 9 states and 234 transitions. [2024-06-20 15:38:09,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 543 transitions, 8091 flow [2024-06-20 15:38:19,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 543 transitions, 7722 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-06-20 15:38:19,555 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 6452 flow [2024-06-20 15:38:19,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6234, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6452, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-20 15:38:19,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-20 15:38:19,556 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 6452 flow [2024-06-20 15:38:19,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:19,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:38:19,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:38:19,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 15:38:19,556 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:38:19,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:38:19,557 INFO L85 PathProgramCache]: Analyzing trace with hash 104027989, now seen corresponding path program 10 times [2024-06-20 15:38:19,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:38:19,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43368116] [2024-06-20 15:38:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:38:19,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:38:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:38:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:38:19,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:38:19,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43368116] [2024-06-20 15:38:19,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43368116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:38:19,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:38:19,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:38:19,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690176852] [2024-06-20 15:38:19,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:38:19,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:38:19,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:38:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:38:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:38:19,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:38:19,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 6452 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:19,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:38:19,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:38:19,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:38:21,734 INFO L124 PetriNetUnfolderBase]: 4864/8405 cut-off events. [2024-06-20 15:38:21,734 INFO L125 PetriNetUnfolderBase]: For 1862948/1862948 co-relation queries the response was YES. [2024-06-20 15:38:21,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61335 conditions, 8405 events. 4864/8405 cut-off events. For 1862948/1862948 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62075 event pairs, 1276 based on Foata normal form. 10/8411 useless extension candidates. Maximal degree in co-relation 61132. Up to 7156 conditions per place. [2024-06-20 15:38:21,857 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 440 selfloop transitions, 88 changer transitions 0/537 dead transitions. [2024-06-20 15:38:21,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 537 transitions, 7914 flow [2024-06-20 15:38:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:38:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:38:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 15:38:21,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:38:21,858 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 6452 flow. Second operand 8 states and 208 transitions. [2024-06-20 15:38:21,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 537 transitions, 7914 flow [2024-06-20 15:38:30,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 537 transitions, 7627 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-20 15:38:30,857 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 6348 flow [2024-06-20 15:38:30,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6165, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6348, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-20 15:38:30,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-20 15:38:30,858 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 6348 flow [2024-06-20 15:38:30,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:30,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:38:30,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:38:30,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 15:38:30,859 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:38:30,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:38:30,859 INFO L85 PathProgramCache]: Analyzing trace with hash 93552469, now seen corresponding path program 11 times [2024-06-20 15:38:30,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:38:30,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973658002] [2024-06-20 15:38:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:38:30,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:38:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:38:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:38:30,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:38:30,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973658002] [2024-06-20 15:38:30,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973658002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:38:30,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:38:30,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:38:30,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949275434] [2024-06-20 15:38:30,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:38:30,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:38:30,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:38:30,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:38:30,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:38:31,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:38:31,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 6348 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:31,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:38:31,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:38:31,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:38:32,932 INFO L124 PetriNetUnfolderBase]: 4834/8357 cut-off events. [2024-06-20 15:38:32,932 INFO L125 PetriNetUnfolderBase]: For 1756014/1756014 co-relation queries the response was YES. [2024-06-20 15:38:33,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59027 conditions, 8357 events. 4834/8357 cut-off events. For 1756014/1756014 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 61726 event pairs, 1282 based on Foata normal form. 10/8363 useless extension candidates. Maximal degree in co-relation 58823. Up to 7356 conditions per place. [2024-06-20 15:38:33,062 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 441 selfloop transitions, 82 changer transitions 0/532 dead transitions. [2024-06-20 15:38:33,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 532 transitions, 7460 flow [2024-06-20 15:38:33,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:38:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:38:33,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 15:38:33,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:38:33,063 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 6348 flow. Second operand 8 states and 204 transitions. [2024-06-20 15:38:33,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 532 transitions, 7460 flow [2024-06-20 15:38:43,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 532 transitions, 7240 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 15:38:43,274 INFO L231 Difference]: Finished difference. Result has 415 places, 510 transitions, 6298 flow [2024-06-20 15:38:43,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6128, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6298, PETRI_PLACES=415, PETRI_TRANSITIONS=510} [2024-06-20 15:38:43,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-20 15:38:43,275 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 510 transitions, 6298 flow [2024-06-20 15:38:43,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:43,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:38:43,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:38:43,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 15:38:43,275 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:38:43,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:38:43,276 INFO L85 PathProgramCache]: Analyzing trace with hash -765229607, now seen corresponding path program 12 times [2024-06-20 15:38:43,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:38:43,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239257736] [2024-06-20 15:38:43,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:38:43,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:38:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:38:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:38:43,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:38:43,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239257736] [2024-06-20 15:38:43,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239257736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:38:43,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:38:43,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:38:43,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261747916] [2024-06-20 15:38:43,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:38:43,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:38:43,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:38:43,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:38:43,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:38:43,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:38:43,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 510 transitions, 6298 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:43,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:38:43,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:38:43,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:38:45,407 INFO L124 PetriNetUnfolderBase]: 4870/8401 cut-off events. [2024-06-20 15:38:45,408 INFO L125 PetriNetUnfolderBase]: For 1777333/1777333 co-relation queries the response was YES. [2024-06-20 15:38:45,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59363 conditions, 8401 events. 4870/8401 cut-off events. For 1777333/1777333 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 62137 event pairs, 1322 based on Foata normal form. 10/8393 useless extension candidates. Maximal degree in co-relation 59158. Up to 7412 conditions per place. [2024-06-20 15:38:45,540 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 86 changer transitions 0/527 dead transitions. [2024-06-20 15:38:45,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 527 transitions, 7465 flow [2024-06-20 15:38:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:38:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:38:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:38:45,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-20 15:38:45,541 INFO L175 Difference]: Start difference. First operand has 415 places, 510 transitions, 6298 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:38:45,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 527 transitions, 7465 flow [2024-06-20 15:38:55,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 527 transitions, 7251 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:38:55,857 INFO L231 Difference]: Finished difference. Result has 413 places, 512 transitions, 6349 flow [2024-06-20 15:38:55,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6349, PETRI_PLACES=413, PETRI_TRANSITIONS=512} [2024-06-20 15:38:55,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-20 15:38:55,858 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 512 transitions, 6349 flow [2024-06-20 15:38:55,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:55,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:38:55,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:38:55,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 15:38:55,859 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:38:55,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:38:55,859 INFO L85 PathProgramCache]: Analyzing trace with hash 519351671, now seen corresponding path program 13 times [2024-06-20 15:38:55,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:38:55,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919729391] [2024-06-20 15:38:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:38:55,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:38:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:38:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:38:55,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:38:55,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919729391] [2024-06-20 15:38:55,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919729391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:38:55,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:38:55,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:38:55,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132959190] [2024-06-20 15:38:55,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:38:55,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:38:55,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:38:55,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:38:55,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:38:55,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:38:55,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 512 transitions, 6349 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:38:55,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:38:55,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:38:55,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:38:58,005 INFO L124 PetriNetUnfolderBase]: 4906/8465 cut-off events. [2024-06-20 15:38:58,006 INFO L125 PetriNetUnfolderBase]: For 1802254/1802254 co-relation queries the response was YES. [2024-06-20 15:38:58,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60031 conditions, 8465 events. 4906/8465 cut-off events. For 1802254/1802254 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 62707 event pairs, 1330 based on Foata normal form. 10/8457 useless extension candidates. Maximal degree in co-relation 59825. Up to 7468 conditions per place. [2024-06-20 15:38:58,129 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 82 changer transitions 0/529 dead transitions. [2024-06-20 15:38:58,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 529 transitions, 7524 flow [2024-06-20 15:38:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:38:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:38:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:38:58,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-20 15:38:58,130 INFO L175 Difference]: Start difference. First operand has 413 places, 512 transitions, 6349 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:38:58,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 529 transitions, 7524 flow [2024-06-20 15:39:05,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 529 transitions, 7298 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 15:39:05,932 INFO L231 Difference]: Finished difference. Result has 415 places, 514 transitions, 6384 flow [2024-06-20 15:39:05,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6123, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6384, PETRI_PLACES=415, PETRI_TRANSITIONS=514} [2024-06-20 15:39:05,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-20 15:39:05,933 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 514 transitions, 6384 flow [2024-06-20 15:39:05,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:39:05,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:39:05,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:39:05,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 15:39:05,934 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:39:05,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:39:05,934 INFO L85 PathProgramCache]: Analyzing trace with hash 519707861, now seen corresponding path program 14 times [2024-06-20 15:39:05,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:39:05,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758442109] [2024-06-20 15:39:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:39:05,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:39:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:39:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:39:06,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:39:06,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758442109] [2024-06-20 15:39:06,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758442109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:39:06,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:39:06,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:39:06,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821938779] [2024-06-20 15:39:06,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:39:06,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:39:06,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:39:06,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:39:06,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:39:06,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:39:06,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 514 transitions, 6384 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:39:06,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:39:06,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:39:06,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:39:08,151 INFO L124 PetriNetUnfolderBase]: 4876/8409 cut-off events. [2024-06-20 15:39:08,151 INFO L125 PetriNetUnfolderBase]: For 1689769/1689769 co-relation queries the response was YES. [2024-06-20 15:39:08,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57903 conditions, 8409 events. 4876/8409 cut-off events. For 1689769/1689769 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 62167 event pairs, 1300 based on Foata normal form. 10/8401 useless extension candidates. Maximal degree in co-relation 57696. Up to 7104 conditions per place. [2024-06-20 15:39:08,295 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 436 selfloop transitions, 88 changer transitions 0/533 dead transitions. [2024-06-20 15:39:08,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 533 transitions, 7502 flow [2024-06-20 15:39:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:39:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:39:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:39:08,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-20 15:39:08,296 INFO L175 Difference]: Start difference. First operand has 415 places, 514 transitions, 6384 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:39:08,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 533 transitions, 7502 flow [2024-06-20 15:39:17,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 533 transitions, 7232 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-20 15:39:17,215 INFO L231 Difference]: Finished difference. Result has 417 places, 514 transitions, 6298 flow [2024-06-20 15:39:17,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6114, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6298, PETRI_PLACES=417, PETRI_TRANSITIONS=514} [2024-06-20 15:39:17,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-20 15:39:17,216 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 514 transitions, 6298 flow [2024-06-20 15:39:17,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:39:17,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:39:17,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:39:17,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 15:39:17,217 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:39:17,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:39:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash -857442783, now seen corresponding path program 1 times [2024-06-20 15:39:17,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:39:17,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332413263] [2024-06-20 15:39:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:39:17,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:39:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:39:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:39:17,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:39:17,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332413263] [2024-06-20 15:39:17,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332413263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:39:17,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:39:17,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:39:17,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877071372] [2024-06-20 15:39:17,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:39:17,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:39:17,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:39:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:39:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:39:17,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:39:17,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 514 transitions, 6298 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:39:17,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:39:17,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:39:17,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:39:19,446 INFO L124 PetriNetUnfolderBase]: 4929/8504 cut-off events. [2024-06-20 15:39:19,446 INFO L125 PetriNetUnfolderBase]: For 1736462/1736462 co-relation queries the response was YES. [2024-06-20 15:39:19,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59401 conditions, 8504 events. 4929/8504 cut-off events. For 1736462/1736462 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 62931 event pairs, 1076 based on Foata normal form. 6/8504 useless extension candidates. Maximal degree in co-relation 59193. Up to 7061 conditions per place. [2024-06-20 15:39:19,587 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 453 selfloop transitions, 83 changer transitions 0/545 dead transitions. [2024-06-20 15:39:19,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 545 transitions, 8200 flow [2024-06-20 15:39:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:39:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:39:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 15:39:19,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-20 15:39:19,588 INFO L175 Difference]: Start difference. First operand has 417 places, 514 transitions, 6298 flow. Second operand 7 states and 186 transitions. [2024-06-20 15:39:19,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 545 transitions, 8200 flow [2024-06-20 15:39:29,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 545 transitions, 7990 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:39:29,518 INFO L231 Difference]: Finished difference. Result has 418 places, 516 transitions, 6341 flow [2024-06-20 15:39:29,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6341, PETRI_PLACES=418, PETRI_TRANSITIONS=516} [2024-06-20 15:39:29,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-20 15:39:29,519 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 516 transitions, 6341 flow [2024-06-20 15:39:29,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:39:29,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:39:29,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:39:29,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 15:39:29,520 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:39:29,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:39:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1672288161, now seen corresponding path program 2 times [2024-06-20 15:39:29,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:39:29,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209146613] [2024-06-20 15:39:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:39:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:39:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:39:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:39:29,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:39:29,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209146613] [2024-06-20 15:39:29,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209146613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:39:29,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:39:29,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:39:29,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347973911] [2024-06-20 15:39:29,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:39:29,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:39:29,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:39:29,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:39:29,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:39:29,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:39:29,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 516 transitions, 6341 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:39:29,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:39:29,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:39:29,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:39:31,763 INFO L124 PetriNetUnfolderBase]: 4995/8634 cut-off events. [2024-06-20 15:39:31,763 INFO L125 PetriNetUnfolderBase]: For 1867151/1867151 co-relation queries the response was YES. [2024-06-20 15:39:31,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61826 conditions, 8634 events. 4995/8634 cut-off events. For 1867151/1867151 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 64158 event pairs, 1078 based on Foata normal form. 6/8634 useless extension candidates. Maximal degree in co-relation 61617. Up to 7097 conditions per place. [2024-06-20 15:39:31,908 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 452 selfloop transitions, 90 changer transitions 0/551 dead transitions. [2024-06-20 15:39:31,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 551 transitions, 8279 flow [2024-06-20 15:39:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:39:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:39:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-20 15:39:31,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2024-06-20 15:39:31,909 INFO L175 Difference]: Start difference. First operand has 418 places, 516 transitions, 6341 flow. Second operand 7 states and 193 transitions. [2024-06-20 15:39:31,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 551 transitions, 8279 flow [2024-06-20 15:39:42,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 551 transitions, 8132 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 15:39:42,998 INFO L231 Difference]: Finished difference. Result has 422 places, 518 transitions, 6464 flow [2024-06-20 15:39:42,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6464, PETRI_PLACES=422, PETRI_TRANSITIONS=518} [2024-06-20 15:39:42,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-20 15:39:42,999 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 518 transitions, 6464 flow [2024-06-20 15:39:42,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:39:42,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:39:42,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:39:42,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 15:39:42,999 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:39:43,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:39:43,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1998663585, now seen corresponding path program 3 times [2024-06-20 15:39:43,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:39:43,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077338651] [2024-06-20 15:39:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:39:43,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:39:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:39:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:39:43,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:39:43,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077338651] [2024-06-20 15:39:43,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077338651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:39:43,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:39:43,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:39:43,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917409838] [2024-06-20 15:39:43,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:39:43,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:39:43,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:39:43,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:39:43,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:39:43,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:39:43,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 518 transitions, 6464 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:39:43,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:39:43,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:39:43,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:39:45,273 INFO L124 PetriNetUnfolderBase]: 4982/8603 cut-off events. [2024-06-20 15:39:45,273 INFO L125 PetriNetUnfolderBase]: For 1805740/1805740 co-relation queries the response was YES. [2024-06-20 15:39:45,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60695 conditions, 8603 events. 4982/8603 cut-off events. For 1805740/1805740 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 63971 event pairs, 1296 based on Foata normal form. 6/8596 useless extension candidates. Maximal degree in co-relation 60485. Up to 7570 conditions per place. [2024-06-20 15:39:45,415 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 466 selfloop transitions, 68 changer transitions 0/543 dead transitions. [2024-06-20 15:39:45,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 543 transitions, 7942 flow [2024-06-20 15:39:45,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:39:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:39:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 15:39:45,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-20 15:39:45,416 INFO L175 Difference]: Start difference. First operand has 422 places, 518 transitions, 6464 flow. Second operand 7 states and 185 transitions. [2024-06-20 15:39:45,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 543 transitions, 7942 flow [2024-06-20 15:39:56,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 543 transitions, 7781 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 15:39:56,259 INFO L231 Difference]: Finished difference. Result has 426 places, 518 transitions, 6443 flow [2024-06-20 15:39:56,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6303, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6443, PETRI_PLACES=426, PETRI_TRANSITIONS=518} [2024-06-20 15:39:56,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-20 15:39:56,260 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 518 transitions, 6443 flow [2024-06-20 15:39:56,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:39:56,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:39:56,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:39:56,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 15:39:56,261 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:39:56,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:39:56,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1999019775, now seen corresponding path program 4 times [2024-06-20 15:39:56,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:39:56,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468849032] [2024-06-20 15:39:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:39:56,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:39:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:39:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:39:56,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:39:56,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468849032] [2024-06-20 15:39:56,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468849032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:39:56,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:39:56,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:39:56,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191805652] [2024-06-20 15:39:56,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:39:56,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:39:56,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:39:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:39:56,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:39:56,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:39:56,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 518 transitions, 6443 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:39:56,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:39:56,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:39:56,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:39:58,414 INFO L124 PetriNetUnfolderBase]: 5010/8656 cut-off events. [2024-06-20 15:39:58,414 INFO L125 PetriNetUnfolderBase]: For 1854833/1854833 co-relation queries the response was YES. [2024-06-20 15:39:58,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60873 conditions, 8656 events. 5010/8656 cut-off events. For 1854833/1854833 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 64425 event pairs, 1315 based on Foata normal form. 8/8658 useless extension candidates. Maximal degree in co-relation 60662. Up to 7720 conditions per place. [2024-06-20 15:39:58,551 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 62 changer transitions 0/537 dead transitions. [2024-06-20 15:39:58,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 537 transitions, 7600 flow [2024-06-20 15:39:58,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:39:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:39:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:39:58,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-20 15:39:58,553 INFO L175 Difference]: Start difference. First operand has 426 places, 518 transitions, 6443 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:39:58,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 537 transitions, 7600 flow [2024-06-20 15:40:10,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 537 transitions, 7371 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 15:40:10,783 INFO L231 Difference]: Finished difference. Result has 426 places, 519 transitions, 6394 flow [2024-06-20 15:40:10,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6217, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6394, PETRI_PLACES=426, PETRI_TRANSITIONS=519} [2024-06-20 15:40:10,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-20 15:40:10,784 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 519 transitions, 6394 flow [2024-06-20 15:40:10,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:10,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:10,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:10,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 15:40:10,785 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:10,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2042303971, now seen corresponding path program 5 times [2024-06-20 15:40:10,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:10,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051045229] [2024-06-20 15:40:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:10,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:10,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:10,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051045229] [2024-06-20 15:40:10,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051045229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:10,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:10,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:10,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568396529] [2024-06-20 15:40:10,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:10,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:10,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:10,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:10,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:10,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:40:10,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 519 transitions, 6394 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:10,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:10,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:40:10,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:13,003 INFO L124 PetriNetUnfolderBase]: 4992/8644 cut-off events. [2024-06-20 15:40:13,003 INFO L125 PetriNetUnfolderBase]: For 1762844/1762844 co-relation queries the response was YES. [2024-06-20 15:40:13,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59282 conditions, 8644 events. 4992/8644 cut-off events. For 1762844/1762844 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64423 event pairs, 1211 based on Foata normal form. 8/8646 useless extension candidates. Maximal degree in co-relation 59070. Up to 7484 conditions per place. [2024-06-20 15:40:13,149 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 72 changer transitions 0/542 dead transitions. [2024-06-20 15:40:13,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 542 transitions, 7874 flow [2024-06-20 15:40:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:13,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:40:13,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-20 15:40:13,150 INFO L175 Difference]: Start difference. First operand has 426 places, 519 transitions, 6394 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:40:13,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 542 transitions, 7874 flow [2024-06-20 15:40:24,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 542 transitions, 7705 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 15:40:24,320 INFO L231 Difference]: Finished difference. Result has 428 places, 519 transitions, 6377 flow [2024-06-20 15:40:24,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6225, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6377, PETRI_PLACES=428, PETRI_TRANSITIONS=519} [2024-06-20 15:40:24,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-20 15:40:24,321 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 519 transitions, 6377 flow [2024-06-20 15:40:24,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:24,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:24,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:24,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 15:40:24,322 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:24,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:24,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2039447011, now seen corresponding path program 6 times [2024-06-20 15:40:24,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:24,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910461462] [2024-06-20 15:40:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:24,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:24,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:24,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910461462] [2024-06-20 15:40:24,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910461462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:24,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:24,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:24,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080420533] [2024-06-20 15:40:24,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:24,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:24,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:24,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:24,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:24,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:40:24,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 519 transitions, 6377 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:24,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:24,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:40:24,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:26,632 INFO L124 PetriNetUnfolderBase]: 4974/8614 cut-off events. [2024-06-20 15:40:26,633 INFO L125 PetriNetUnfolderBase]: For 1668029/1668029 co-relation queries the response was YES. [2024-06-20 15:40:26,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57566 conditions, 8614 events. 4974/8614 cut-off events. For 1668029/1668029 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64219 event pairs, 1301 based on Foata normal form. 8/8616 useless extension candidates. Maximal degree in co-relation 57353. Up to 7668 conditions per place. [2024-06-20 15:40:26,786 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 468 selfloop transitions, 60 changer transitions 0/537 dead transitions. [2024-06-20 15:40:26,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 537 transitions, 7489 flow [2024-06-20 15:40:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:40:26,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-20 15:40:26,787 INFO L175 Difference]: Start difference. First operand has 428 places, 519 transitions, 6377 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:40:26,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 537 transitions, 7489 flow [2024-06-20 15:40:36,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 537 transitions, 7271 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:40:36,292 INFO L231 Difference]: Finished difference. Result has 429 places, 519 transitions, 6288 flow [2024-06-20 15:40:36,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6288, PETRI_PLACES=429, PETRI_TRANSITIONS=519} [2024-06-20 15:40:36,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-20 15:40:36,293 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 519 transitions, 6288 flow [2024-06-20 15:40:36,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:36,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:36,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:36,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 15:40:36,293 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:36,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:36,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1923694697, now seen corresponding path program 1 times [2024-06-20 15:40:36,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:36,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756456320] [2024-06-20 15:40:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:36,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:36,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:36,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756456320] [2024-06-20 15:40:36,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756456320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:36,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:36,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:36,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589316644] [2024-06-20 15:40:36,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:36,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:36,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:36,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:36,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:36,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:40:36,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 519 transitions, 6288 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:36,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:36,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:40:36,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:38,450 INFO L124 PetriNetUnfolderBase]: 4995/8653 cut-off events. [2024-06-20 15:40:38,450 INFO L125 PetriNetUnfolderBase]: For 1611591/1611591 co-relation queries the response was YES. [2024-06-20 15:40:38,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57817 conditions, 8653 events. 4995/8653 cut-off events. For 1611591/1611591 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 64624 event pairs, 1304 based on Foata normal form. 1/8648 useless extension candidates. Maximal degree in co-relation 57603. Up to 7567 conditions per place. [2024-06-20 15:40:38,598 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 421 selfloop transitions, 118 changer transitions 0/548 dead transitions. [2024-06-20 15:40:38,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 548 transitions, 8222 flow [2024-06-20 15:40:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:40:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:40:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 15:40:38,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2024-06-20 15:40:38,600 INFO L175 Difference]: Start difference. First operand has 429 places, 519 transitions, 6288 flow. Second operand 8 states and 209 transitions. [2024-06-20 15:40:38,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 548 transitions, 8222 flow [2024-06-20 15:40:50,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 548 transitions, 8058 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:40:50,129 INFO L231 Difference]: Finished difference. Result has 432 places, 528 transitions, 6600 flow [2024-06-20 15:40:50,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6124, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6600, PETRI_PLACES=432, PETRI_TRANSITIONS=528} [2024-06-20 15:40:50,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-20 15:40:50,130 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 528 transitions, 6600 flow [2024-06-20 15:40:50,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:50,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:50,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:50,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 15:40:50,130 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:50,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:50,131 INFO L85 PathProgramCache]: Analyzing trace with hash 973564511, now seen corresponding path program 2 times [2024-06-20 15:40:50,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:50,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889948502] [2024-06-20 15:40:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:50,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:50,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:50,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889948502] [2024-06-20 15:40:50,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889948502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:50,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:50,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:50,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30635080] [2024-06-20 15:40:50,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:50,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:50,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:50,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:50,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:50,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:40:50,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 528 transitions, 6600 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:50,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:50,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:40:50,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:52,555 INFO L124 PetriNetUnfolderBase]: 5000/8654 cut-off events. [2024-06-20 15:40:52,555 INFO L125 PetriNetUnfolderBase]: For 1630511/1630511 co-relation queries the response was YES. [2024-06-20 15:40:52,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58349 conditions, 8654 events. 5000/8654 cut-off events. For 1630511/1630511 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64535 event pairs, 1304 based on Foata normal form. 1/8649 useless extension candidates. Maximal degree in co-relation 58132. Up to 7573 conditions per place. [2024-06-20 15:40:52,692 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 127 changer transitions 0/547 dead transitions. [2024-06-20 15:40:52,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 547 transitions, 8448 flow [2024-06-20 15:40:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:40:52,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-20 15:40:52,693 INFO L175 Difference]: Start difference. First operand has 432 places, 528 transitions, 6600 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:40:52,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 547 transitions, 8448 flow [2024-06-20 15:41:04,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 547 transitions, 8274 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:04,932 INFO L231 Difference]: Finished difference. Result has 434 places, 531 transitions, 6749 flow [2024-06-20 15:41:04,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6433, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6749, PETRI_PLACES=434, PETRI_TRANSITIONS=531} [2024-06-20 15:41:04,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-20 15:41:04,933 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 531 transitions, 6749 flow [2024-06-20 15:41:04,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:04,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:04,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:04,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 15:41:04,933 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:04,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:04,933 INFO L85 PathProgramCache]: Analyzing trace with hash 973357121, now seen corresponding path program 3 times [2024-06-20 15:41:04,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:04,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087402483] [2024-06-20 15:41:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:04,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:05,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:05,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087402483] [2024-06-20 15:41:05,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087402483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:05,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:05,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:41:05,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972396558] [2024-06-20 15:41:05,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:05,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:41:05,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:05,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:41:05,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:41:05,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:41:05,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 531 transitions, 6749 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:05,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:05,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:41:05,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:07,214 INFO L124 PetriNetUnfolderBase]: 4997/8650 cut-off events. [2024-06-20 15:41:07,214 INFO L125 PetriNetUnfolderBase]: For 1616959/1616959 co-relation queries the response was YES. [2024-06-20 15:41:07,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58211 conditions, 8650 events. 4997/8650 cut-off events. For 1616959/1616959 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64583 event pairs, 1304 based on Foata normal form. 1/8645 useless extension candidates. Maximal degree in co-relation 57994. Up to 7570 conditions per place. [2024-06-20 15:41:07,349 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 419 selfloop transitions, 118 changer transitions 0/546 dead transitions. [2024-06-20 15:41:07,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 546 transitions, 8199 flow [2024-06-20 15:41:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:41:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:41:07,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:41:07,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:41:07,350 INFO L175 Difference]: Start difference. First operand has 434 places, 531 transitions, 6749 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:41:07,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 546 transitions, 8199 flow [2024-06-20 15:41:19,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 546 transitions, 7967 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:19,360 INFO L231 Difference]: Finished difference. Result has 436 places, 531 transitions, 6769 flow [2024-06-20 15:41:19,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6519, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6769, PETRI_PLACES=436, PETRI_TRANSITIONS=531} [2024-06-20 15:41:19,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-20 15:41:19,361 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 531 transitions, 6769 flow [2024-06-20 15:41:19,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:19,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:19,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:19,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 15:41:19,361 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:19,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:19,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1998817345, now seen corresponding path program 4 times [2024-06-20 15:41:19,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:19,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747103607] [2024-06-20 15:41:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:19,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:19,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:19,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747103607] [2024-06-20 15:41:19,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747103607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:19,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:19,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:41:19,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531927128] [2024-06-20 15:41:19,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:19,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:41:19,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:41:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:41:19,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:41:19,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 531 transitions, 6769 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:19,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:19,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:41:19,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:21,683 INFO L124 PetriNetUnfolderBase]: 5002/8659 cut-off events. [2024-06-20 15:41:21,684 INFO L125 PetriNetUnfolderBase]: For 1617535/1617535 co-relation queries the response was YES. [2024-06-20 15:41:21,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58283 conditions, 8659 events. 5002/8659 cut-off events. For 1617535/1617535 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 64661 event pairs, 1304 based on Foata normal form. 1/8654 useless extension candidates. Maximal degree in co-relation 58066. Up to 7576 conditions per place. [2024-06-20 15:41:21,820 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 422 selfloop transitions, 121 changer transitions 0/552 dead transitions. [2024-06-20 15:41:21,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 552 transitions, 8293 flow [2024-06-20 15:41:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:41:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:41:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:41:21,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-20 15:41:21,822 INFO L175 Difference]: Start difference. First operand has 436 places, 531 transitions, 6769 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:41:21,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 552 transitions, 8293 flow [2024-06-20 15:41:34,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 552 transitions, 7969 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:41:34,637 INFO L231 Difference]: Finished difference. Result has 435 places, 534 transitions, 6755 flow [2024-06-20 15:41:34,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6453, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6755, PETRI_PLACES=435, PETRI_TRANSITIONS=534} [2024-06-20 15:41:34,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-20 15:41:34,637 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 534 transitions, 6755 flow [2024-06-20 15:41:34,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:34,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:34,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:34,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 15:41:34,638 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:34,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:34,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1998822925, now seen corresponding path program 5 times [2024-06-20 15:41:34,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:34,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919602713] [2024-06-20 15:41:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:34,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:34,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:34,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919602713] [2024-06-20 15:41:34,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919602713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:34,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:34,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:41:34,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385767661] [2024-06-20 15:41:34,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:34,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:41:34,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:34,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:41:34,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:41:34,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:41:34,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 534 transitions, 6755 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:34,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:34,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:41:34,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:36,922 INFO L124 PetriNetUnfolderBase]: 5007/8668 cut-off events. [2024-06-20 15:41:36,922 INFO L125 PetriNetUnfolderBase]: For 1616870/1616870 co-relation queries the response was YES. [2024-06-20 15:41:37,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58329 conditions, 8668 events. 5007/8668 cut-off events. For 1616870/1616870 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 64726 event pairs, 1304 based on Foata normal form. 1/8663 useless extension candidates. Maximal degree in co-relation 58112. Up to 7582 conditions per place. [2024-06-20 15:41:37,071 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 123 changer transitions 0/552 dead transitions. [2024-06-20 15:41:37,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 552 transitions, 8271 flow [2024-06-20 15:41:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:41:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:41:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:41:37,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-20 15:41:37,072 INFO L175 Difference]: Start difference. First operand has 435 places, 534 transitions, 6755 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:41:37,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 552 transitions, 8271 flow [2024-06-20 15:41:50,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 552 transitions, 8013 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:50,742 INFO L231 Difference]: Finished difference. Result has 436 places, 537 transitions, 6809 flow [2024-06-20 15:41:50,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6809, PETRI_PLACES=436, PETRI_TRANSITIONS=537} [2024-06-20 15:41:50,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-20 15:41:50,743 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 537 transitions, 6809 flow [2024-06-20 15:41:50,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:50,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:50,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:50,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 15:41:50,743 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:50,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2039442051, now seen corresponding path program 6 times [2024-06-20 15:41:50,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:50,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518008704] [2024-06-20 15:41:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:50,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:50,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:50,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518008704] [2024-06-20 15:41:50,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518008704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:50,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:50,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:41:50,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694233746] [2024-06-20 15:41:50,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:50,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:41:50,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:50,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:41:50,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:41:50,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-20 15:41:50,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 537 transitions, 6809 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:50,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:50,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-20 15:41:50,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:53,191 INFO L124 PetriNetUnfolderBase]: 5004/8664 cut-off events. [2024-06-20 15:41:53,192 INFO L125 PetriNetUnfolderBase]: For 1602329/1602329 co-relation queries the response was YES. [2024-06-20 15:41:53,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58109 conditions, 8664 events. 5004/8664 cut-off events. For 1602329/1602329 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 64709 event pairs, 1304 based on Foata normal form. 1/8659 useless extension candidates. Maximal degree in co-relation 57892. Up to 7579 conditions per place. [2024-06-20 15:41:53,329 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 412 selfloop transitions, 130 changer transitions 0/551 dead transitions. [2024-06-20 15:41:53,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 551 transitions, 7927 flow [2024-06-20 15:41:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:41:53,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:41:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:41:53,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-20 15:41:53,331 INFO L175 Difference]: Start difference. First operand has 436 places, 537 transitions, 6809 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:41:53,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 551 transitions, 7927 flow Killed by 15