./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:02:38,996 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:02:39,056 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:02:39,061 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:02:39,062 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:02:39,087 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:02:39,089 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:02:39,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:02:39,090 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:02:39,093 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:02:39,093 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:02:39,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:02:39,095 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:02:39,096 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:02:39,096 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:02:39,096 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:02:39,096 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:02:39,097 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:02:39,097 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:02:39,097 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:02:39,097 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:02:39,098 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:02:39,098 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:02:39,098 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:02:39,098 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:02:39,098 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:02:39,099 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:02:39,099 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:02:39,099 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:02:39,100 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:02:39,100 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:02:39,101 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:02:39,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:02:39,101 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:02:39,101 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:02:39,101 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:02:39,102 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:02:39,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:02:39,102 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:02:39,102 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:02:39,102 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:02:39,103 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:02:39,103 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:02:39,103 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:02:39,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:02:39,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:02:39,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:02:39,366 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:02:39,367 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:02:39,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_tso.yml/witness.yml [2024-06-21 20:02:39,481 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:02:39,481 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:02:39,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2024-06-21 20:02:40,566 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:02:40,789 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:02:40,789 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2024-06-21 20:02:40,804 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ab5ea00/2f13923820f442d6ad9063a83a2d7ab9/FLAG607824497 [2024-06-21 20:02:40,817 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ab5ea00/2f13923820f442d6ad9063a83a2d7ab9 [2024-06-21 20:02:40,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:02:40,819 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:02:40,822 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:02:40,822 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:02:40,826 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:02:40,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:39" (1/2) ... [2024-06-21 20:02:40,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2237d7ad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:40, skipping insertion in model container [2024-06-21 20:02:40,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:39" (1/2) ... [2024-06-21 20:02:40,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@501166a5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:40, skipping insertion in model container [2024-06-21 20:02:40,829 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:02:40" (2/2) ... [2024-06-21 20:02:40,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2237d7ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:40, skipping insertion in model container [2024-06-21 20:02:40,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:02:40" (2/2) ... [2024-06-21 20:02:40,829 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:02:40,866 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:02:40,867 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 20:02:40,868 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 20:02:40,868 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 20:02:40,868 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:02:40,868 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-21 20:02:40,901 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:02:41,187 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:02:41,196 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:02:41,299 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:02:41,334 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:02:41,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41 WrapperNode [2024-06-21 20:02:41,334 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:02:41,336 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:02:41,336 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:02:41,336 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:02:41,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,368 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,414 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-21 20:02:41,416 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:02:41,416 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:02:41,417 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:02:41,417 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:02:41,426 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,431 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,442 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:02:41,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,474 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,475 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,476 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,478 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:02:41,478 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:02:41,478 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:02:41,478 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:02:41,479 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:02:41,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:02:41,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:02:41,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:02:41,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:02:41,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:02:41,595 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:02:41,596 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:02:41,596 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:02:41,596 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:02:41,596 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:02:41,596 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:02:41,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:02:41,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:02:41,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:02:41,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:02:41,598 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:02:41,725 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:02:41,728 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:02:41,946 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:02:41,947 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:02:42,018 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:02:42,019 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:02:42,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:02:42 BoogieIcfgContainer [2024-06-21 20:02:42,019 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:02:42,021 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:02:42,036 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:02:42,039 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:02:42,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:39" (1/4) ... [2024-06-21 20:02:42,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1764fd67 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:02:42, skipping insertion in model container [2024-06-21 20:02:42,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:02:40" (2/4) ... [2024-06-21 20:02:42,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1764fd67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:02:42, skipping insertion in model container [2024-06-21 20:02:42,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41" (3/4) ... [2024-06-21 20:02:42,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1764fd67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:02:42, skipping insertion in model container [2024-06-21 20:02:42,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:02:42" (4/4) ... [2024-06-21 20:02:42,042 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_tso.i [2024-06-21 20:02:42,056 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:02:42,056 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:02:42,056 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:02:42,094 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:02:42,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 20:02:42,151 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 20:02:42,151 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:02:42,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:02:42,153 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 20:02:42,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 20:02:42,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:02:42,174 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;@31fcdc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:02:42,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:02:42,177 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:02:42,177 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:02:42,178 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:02:42,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:42,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:02:42,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:42,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:42,182 INFO L85 PathProgramCache]: Analyzing trace with hash 219930474, now seen corresponding path program 1 times [2024-06-21 20:02:42,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:42,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890255166] [2024-06-21 20:02:42,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:42,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:42,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:42,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890255166] [2024-06-21 20:02:42,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890255166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:42,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:42,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:02:42,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242262536] [2024-06-21 20:02:42,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:42,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:02:42,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:02:42,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:02:42,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 20:02:42,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:42,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:42,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 20:02:42,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:42,710 INFO L124 PetriNetUnfolderBase]: 430/713 cut-off events. [2024-06-21 20:02:42,711 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-06-21 20:02:42,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1436 conditions, 713 events. 430/713 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3407 event pairs, 273 based on Foata normal form. 1/675 useless extension candidates. Maximal degree in co-relation 1424. Up to 672 conditions per place. [2024-06-21 20:02:42,720 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-21 20:02:42,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-21 20:02:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:02:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:02:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-21 20:02:42,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-21 20:02:42,731 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-21 20:02:42,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-21 20:02:42,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:42,735 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 20:02:42,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 20:02:42,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 20:02:42,739 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 20:02:42,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:42,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:42,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:42,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:02:42,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:42,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:42,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1029876338, now seen corresponding path program 1 times [2024-06-21 20:02:42,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:42,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54410403] [2024-06-21 20:02:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:42,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:42,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:42,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54410403] [2024-06-21 20:02:42,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54410403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:42,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:42,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:42,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768276037] [2024-06-21 20:02:42,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:42,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:42,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:42,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:42,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:43,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:43,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:43,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:43,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:43,145 INFO L124 PetriNetUnfolderBase]: 755/1225 cut-off events. [2024-06-21 20:02:43,145 INFO L125 PetriNetUnfolderBase]: For 226/240 co-relation queries the response was YES. [2024-06-21 20:02:43,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 1225 events. 755/1225 cut-off events. For 226/240 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5975 event pairs, 367 based on Foata normal form. 13/1205 useless extension candidates. Maximal degree in co-relation 2806. Up to 1093 conditions per place. [2024-06-21 20:02:43,153 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-21 20:02:43,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 218 flow [2024-06-21 20:02:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:43,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-21 20:02:43,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:02:43,155 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 104 transitions. [2024-06-21 20:02:43,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 218 flow [2024-06-21 20:02:43,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:43,157 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-21 20:02:43,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-21 20:02:43,158 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-21 20:02:43,158 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-21 20:02:43,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:43,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:43,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:02:43,159 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)] === [2024-06-21 20:02:43,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:43,160 INFO L85 PathProgramCache]: Analyzing trace with hash 933975979, now seen corresponding path program 1 times [2024-06-21 20:02:43,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:43,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973930440] [2024-06-21 20:02:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:43,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:43,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:43,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973930440] [2024-06-21 20:02:43,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973930440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:43,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:43,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:02:43,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111966179] [2024-06-21 20:02:43,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:43,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:02:43,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:43,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:02:43,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:02:43,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 20:02:43,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:43,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 20:02:43,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:43,373 INFO L124 PetriNetUnfolderBase]: 583/983 cut-off events. [2024-06-21 20:02:43,374 INFO L125 PetriNetUnfolderBase]: For 496/499 co-relation queries the response was YES. [2024-06-21 20:02:43,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2451 conditions, 983 events. 583/983 cut-off events. For 496/499 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4829 event pairs, 249 based on Foata normal form. 4/984 useless extension candidates. Maximal degree in co-relation 2437. Up to 889 conditions per place. [2024-06-21 20:02:43,379 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 36 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-21 20:02:43,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 259 flow [2024-06-21 20:02:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-21 20:02:43,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:02:43,381 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 4 states and 104 transitions. [2024-06-21 20:02:43,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 259 flow [2024-06-21 20:02:43,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 242 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:43,384 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 164 flow [2024-06-21 20:02:43,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-21 20:02:43,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2024-06-21 20:02:43,385 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 164 flow [2024-06-21 20:02:43,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:43,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:43,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:02:43,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:43,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:43,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1111514431, now seen corresponding path program 1 times [2024-06-21 20:02:43,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:43,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151443888] [2024-06-21 20:02:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:43,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:43,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:43,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151443888] [2024-06-21 20:02:43,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151443888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:43,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:43,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:43,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109327484] [2024-06-21 20:02:43,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:43,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:43,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:43,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:43,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:43,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:43,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:43,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:43,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:43,619 INFO L124 PetriNetUnfolderBase]: 890/1463 cut-off events. [2024-06-21 20:02:43,619 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2024-06-21 20:02:43,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3948 conditions, 1463 events. 890/1463 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7226 event pairs, 354 based on Foata normal form. 2/1463 useless extension candidates. Maximal degree in co-relation 3932. Up to 1332 conditions per place. [2024-06-21 20:02:43,627 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 20:02:43,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 65 transitions, 345 flow [2024-06-21 20:02:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 20:02:43,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-21 20:02:43,629 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 164 flow. Second operand 5 states and 119 transitions. [2024-06-21 20:02:43,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 65 transitions, 345 flow [2024-06-21 20:02:43,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 341 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:43,633 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 233 flow [2024-06-21 20:02:43,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-21 20:02:43,633 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-21 20:02:43,634 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 233 flow [2024-06-21 20:02:43,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:43,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:43,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:02:43,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:43,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash 187187522, now seen corresponding path program 1 times [2024-06-21 20:02:43,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:43,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078114032] [2024-06-21 20:02:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:43,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:43,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:43,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078114032] [2024-06-21 20:02:43,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078114032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:43,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:43,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:43,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951293913] [2024-06-21 20:02:43,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:43,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:43,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:43,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:43,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:43,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:43,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:43,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:43,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:43,963 INFO L124 PetriNetUnfolderBase]: 885/1465 cut-off events. [2024-06-21 20:02:43,964 INFO L125 PetriNetUnfolderBase]: For 1967/2000 co-relation queries the response was YES. [2024-06-21 20:02:43,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4476 conditions, 1465 events. 885/1465 cut-off events. For 1967/2000 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7379 event pairs, 300 based on Foata normal form. 15/1463 useless extension candidates. Maximal degree in co-relation 4455. Up to 1265 conditions per place. [2024-06-21 20:02:43,976 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 41 selfloop transitions, 14 changer transitions 0/66 dead transitions. [2024-06-21 20:02:43,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 66 transitions, 395 flow [2024-06-21 20:02:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 20:02:43,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-06-21 20:02:43,978 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 233 flow. Second operand 4 states and 105 transitions. [2024-06-21 20:02:43,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 66 transitions, 395 flow [2024-06-21 20:02:43,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 395 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:43,987 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 297 flow [2024-06-21 20:02:43,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=297, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-21 20:02:43,990 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-21 20:02:43,990 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 297 flow [2024-06-21 20:02:43,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:43,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:43,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:02:43,994 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:43,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:43,994 INFO L85 PathProgramCache]: Analyzing trace with hash -934672516, now seen corresponding path program 2 times [2024-06-21 20:02:43,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:43,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440839183] [2024-06-21 20:02:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:43,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:44,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:44,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440839183] [2024-06-21 20:02:44,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440839183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:44,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:44,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:44,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221975748] [2024-06-21 20:02:44,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:44,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:44,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:44,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:44,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:44,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:44,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:44,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:44,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:44,335 INFO L124 PetriNetUnfolderBase]: 877/1456 cut-off events. [2024-06-21 20:02:44,335 INFO L125 PetriNetUnfolderBase]: For 3045/3091 co-relation queries the response was YES. [2024-06-21 20:02:44,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4930 conditions, 1456 events. 877/1456 cut-off events. For 3045/3091 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7346 event pairs, 300 based on Foata normal form. 20/1459 useless extension candidates. Maximal degree in co-relation 4906. Up to 1242 conditions per place. [2024-06-21 20:02:44,345 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 45 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-21 20:02:44,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 489 flow [2024-06-21 20:02:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 20:02:44,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-21 20:02:44,347 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 297 flow. Second operand 5 states and 127 transitions. [2024-06-21 20:02:44,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 489 flow [2024-06-21 20:02:44,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 453 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:44,351 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 331 flow [2024-06-21 20:02:44,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-21 20:02:44,352 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-21 20:02:44,352 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 331 flow [2024-06-21 20:02:44,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:44,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:44,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:02:44,353 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:44,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash -934672330, now seen corresponding path program 1 times [2024-06-21 20:02:44,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:44,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975565588] [2024-06-21 20:02:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:44,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:44,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:44,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975565588] [2024-06-21 20:02:44,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975565588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:44,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:44,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:44,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515225682] [2024-06-21 20:02:44,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:44,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:44,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:44,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:44,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:44,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 331 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:44,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:44,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:44,635 INFO L124 PetriNetUnfolderBase]: 965/1584 cut-off events. [2024-06-21 20:02:44,635 INFO L125 PetriNetUnfolderBase]: For 3011/3013 co-relation queries the response was YES. [2024-06-21 20:02:44,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5280 conditions, 1584 events. 965/1584 cut-off events. For 3011/3013 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8060 event pairs, 282 based on Foata normal form. 8/1589 useless extension candidates. Maximal degree in co-relation 5255. Up to 1336 conditions per place. [2024-06-21 20:02:44,646 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 60 selfloop transitions, 27 changer transitions 0/94 dead transitions. [2024-06-21 20:02:44,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 651 flow [2024-06-21 20:02:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:02:44,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-21 20:02:44,648 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 331 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:02:44,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 651 flow [2024-06-21 20:02:44,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 609 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:44,653 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 456 flow [2024-06-21 20:02:44,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2024-06-21 20:02:44,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-21 20:02:44,654 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 456 flow [2024-06-21 20:02:44,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:44,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:44,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:02:44,655 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:44,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2137423252, now seen corresponding path program 2 times [2024-06-21 20:02:44,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:44,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951865821] [2024-06-21 20:02:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:44,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:44,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:44,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951865821] [2024-06-21 20:02:44,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951865821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:44,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:44,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:44,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028106764] [2024-06-21 20:02:44,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:44,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:44,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:44,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:44,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:44,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 456 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:44,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:44,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:44,935 INFO L124 PetriNetUnfolderBase]: 960/1588 cut-off events. [2024-06-21 20:02:44,935 INFO L125 PetriNetUnfolderBase]: For 4726/4728 co-relation queries the response was YES. [2024-06-21 20:02:44,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6188 conditions, 1588 events. 960/1588 cut-off events. For 4726/4728 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8060 event pairs, 328 based on Foata normal form. 4/1589 useless extension candidates. Maximal degree in co-relation 6160. Up to 1384 conditions per place. [2024-06-21 20:02:44,947 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 74 selfloop transitions, 20 changer transitions 0/101 dead transitions. [2024-06-21 20:02:44,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 780 flow [2024-06-21 20:02:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:44,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 20:02:44,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-21 20:02:44,948 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 456 flow. Second operand 6 states and 143 transitions. [2024-06-21 20:02:44,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 780 flow [2024-06-21 20:02:44,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 101 transitions, 730 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:44,960 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 581 flow [2024-06-21 20:02:44,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=581, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2024-06-21 20:02:44,960 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 20:02:44,961 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 581 flow [2024-06-21 20:02:44,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:44,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:44,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:02:44,961 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:44,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:44,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1281530880, now seen corresponding path program 1 times [2024-06-21 20:02:44,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:44,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439237943] [2024-06-21 20:02:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:44,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:45,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:45,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439237943] [2024-06-21 20:02:45,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439237943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:45,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:45,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:45,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372381541] [2024-06-21 20:02:45,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:45,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:45,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:45,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:45,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:45,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:45,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 581 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:45,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:45,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:45,258 INFO L124 PetriNetUnfolderBase]: 952/1574 cut-off events. [2024-06-21 20:02:45,259 INFO L125 PetriNetUnfolderBase]: For 5734/5734 co-relation queries the response was YES. [2024-06-21 20:02:45,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6457 conditions, 1574 events. 952/1574 cut-off events. For 5734/5734 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7971 event pairs, 305 based on Foata normal form. 4/1576 useless extension candidates. Maximal degree in co-relation 6425. Up to 1401 conditions per place. [2024-06-21 20:02:45,269 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 85 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2024-06-21 20:02:45,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 104 transitions, 843 flow [2024-06-21 20:02:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:02:45,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:02:45,270 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 581 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:02:45,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 104 transitions, 843 flow [2024-06-21 20:02:45,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 104 transitions, 825 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:45,279 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 616 flow [2024-06-21 20:02:45,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=616, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-06-21 20:02:45,280 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-21 20:02:45,280 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 616 flow [2024-06-21 20:02:45,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:45,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:45,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:02:45,281 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:45,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:45,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1626430724, now seen corresponding path program 1 times [2024-06-21 20:02:45,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:45,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118419217] [2024-06-21 20:02:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:45,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:45,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:45,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118419217] [2024-06-21 20:02:45,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118419217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:45,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:45,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:45,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853962998] [2024-06-21 20:02:45,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:45,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:45,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:45,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:45,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:45,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:45,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 616 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:45,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:45,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:45,614 INFO L124 PetriNetUnfolderBase]: 1092/1787 cut-off events. [2024-06-21 20:02:45,614 INFO L125 PetriNetUnfolderBase]: For 7493/7497 co-relation queries the response was YES. [2024-06-21 20:02:45,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7694 conditions, 1787 events. 1092/1787 cut-off events. For 7493/7497 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9185 event pairs, 278 based on Foata normal form. 5/1787 useless extension candidates. Maximal degree in co-relation 7659. Up to 1459 conditions per place. [2024-06-21 20:02:45,626 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 82 selfloop transitions, 51 changer transitions 0/140 dead transitions. [2024-06-21 20:02:45,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 140 transitions, 1264 flow [2024-06-21 20:02:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:02:45,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:02:45,628 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 616 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:02:45,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 140 transitions, 1264 flow [2024-06-21 20:02:45,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 140 transitions, 1229 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:45,641 INFO L231 Difference]: Finished difference. Result has 82 places, 118 transitions, 1074 flow [2024-06-21 20:02:45,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1074, PETRI_PLACES=82, PETRI_TRANSITIONS=118} [2024-06-21 20:02:45,642 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-21 20:02:45,642 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 118 transitions, 1074 flow [2024-06-21 20:02:45,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:45,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:45,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:02:45,643 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:45,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:45,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1089929948, now seen corresponding path program 2 times [2024-06-21 20:02:45,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:45,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333261138] [2024-06-21 20:02:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:45,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:45,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:45,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333261138] [2024-06-21 20:02:45,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333261138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:45,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:45,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:45,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257718674] [2024-06-21 20:02:45,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:45,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:45,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:45,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:45,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:45,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:45,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 118 transitions, 1074 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:45,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:45,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:45,993 INFO L124 PetriNetUnfolderBase]: 1163/1911 cut-off events. [2024-06-21 20:02:45,993 INFO L125 PetriNetUnfolderBase]: For 11177/11181 co-relation queries the response was YES. [2024-06-21 20:02:45,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9401 conditions, 1911 events. 1163/1911 cut-off events. For 11177/11181 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9972 event pairs, 276 based on Foata normal form. 5/1911 useless extension candidates. Maximal degree in co-relation 9363. Up to 1402 conditions per place. [2024-06-21 20:02:46,007 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 76 selfloop transitions, 78 changer transitions 0/161 dead transitions. [2024-06-21 20:02:46,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 161 transitions, 1714 flow [2024-06-21 20:02:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:02:46,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-21 20:02:46,009 INFO L175 Difference]: Start difference. First operand has 82 places, 118 transitions, 1074 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:02:46,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 161 transitions, 1714 flow [2024-06-21 20:02:46,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 161 transitions, 1684 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:46,031 INFO L231 Difference]: Finished difference. Result has 91 places, 132 transitions, 1438 flow [2024-06-21 20:02:46,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1438, PETRI_PLACES=91, PETRI_TRANSITIONS=132} [2024-06-21 20:02:46,032 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-21 20:02:46,032 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 132 transitions, 1438 flow [2024-06-21 20:02:46,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:46,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:46,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:02:46,033 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)] === [2024-06-21 20:02:46,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:46,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1089924368, now seen corresponding path program 3 times [2024-06-21 20:02:46,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:46,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061826418] [2024-06-21 20:02:46,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:46,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:46,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:46,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061826418] [2024-06-21 20:02:46,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061826418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:46,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:46,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:46,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926331976] [2024-06-21 20:02:46,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:46,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:46,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:46,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:46,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:46,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:46,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 132 transitions, 1438 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:46,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:46,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:46,448 INFO L124 PetriNetUnfolderBase]: 1186/1953 cut-off events. [2024-06-21 20:02:46,448 INFO L125 PetriNetUnfolderBase]: For 14976/14980 co-relation queries the response was YES. [2024-06-21 20:02:46,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10833 conditions, 1953 events. 1186/1953 cut-off events. For 14976/14980 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10290 event pairs, 278 based on Foata normal form. 5/1953 useless extension candidates. Maximal degree in co-relation 10791. Up to 1425 conditions per place. [2024-06-21 20:02:46,465 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 85 selfloop transitions, 83 changer transitions 0/175 dead transitions. [2024-06-21 20:02:46,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 2076 flow [2024-06-21 20:02:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:02:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:02:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 20:02:46,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 20:02:46,468 INFO L175 Difference]: Start difference. First operand has 91 places, 132 transitions, 1438 flow. Second operand 9 states and 222 transitions. [2024-06-21 20:02:46,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 2076 flow [2024-06-21 20:02:46,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 175 transitions, 1990 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:46,504 INFO L231 Difference]: Finished difference. Result has 98 places, 140 transitions, 1651 flow [2024-06-21 20:02:46,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1651, PETRI_PLACES=98, PETRI_TRANSITIONS=140} [2024-06-21 20:02:46,505 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-21 20:02:46,505 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 140 transitions, 1651 flow [2024-06-21 20:02:46,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:46,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:46,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:02:46,505 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:46,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:46,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1835612478, now seen corresponding path program 4 times [2024-06-21 20:02:46,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:46,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545084581] [2024-06-21 20:02:46,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:46,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:46,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:46,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545084581] [2024-06-21 20:02:46,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545084581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:46,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:46,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:46,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007537916] [2024-06-21 20:02:46,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:46,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:46,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:46,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:46,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:46,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:46,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 140 transitions, 1651 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:46,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:46,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:46,940 INFO L124 PetriNetUnfolderBase]: 1181/1961 cut-off events. [2024-06-21 20:02:46,940 INFO L125 PetriNetUnfolderBase]: For 16094/16098 co-relation queries the response was YES. [2024-06-21 20:02:46,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11070 conditions, 1961 events. 1181/1961 cut-off events. For 16094/16098 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10295 event pairs, 315 based on Foata normal form. 3/1959 useless extension candidates. Maximal degree in co-relation 11025. Up to 1602 conditions per place. [2024-06-21 20:02:46,954 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 131 selfloop transitions, 42 changer transitions 0/180 dead transitions. [2024-06-21 20:02:46,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 2263 flow [2024-06-21 20:02:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:02:46,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-21 20:02:46,956 INFO L175 Difference]: Start difference. First operand has 98 places, 140 transitions, 1651 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:02:46,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 2263 flow [2024-06-21 20:02:46,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 180 transitions, 2081 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:46,985 INFO L231 Difference]: Finished difference. Result has 103 places, 157 transitions, 1843 flow [2024-06-21 20:02:46,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1843, PETRI_PLACES=103, PETRI_TRANSITIONS=157} [2024-06-21 20:02:46,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-21 20:02:46,986 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 157 transitions, 1843 flow [2024-06-21 20:02:46,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:46,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:46,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:02:46,986 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:46,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:46,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2003529296, now seen corresponding path program 1 times [2024-06-21 20:02:46,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:46,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052204933] [2024-06-21 20:02:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:47,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:47,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052204933] [2024-06-21 20:02:47,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052204933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:47,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:47,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081434405] [2024-06-21 20:02:47,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:47,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:47,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:47,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:47,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 157 transitions, 1843 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:47,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:47,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:47,324 INFO L124 PetriNetUnfolderBase]: 1115/1865 cut-off events. [2024-06-21 20:02:47,324 INFO L125 PetriNetUnfolderBase]: For 17546/17551 co-relation queries the response was YES. [2024-06-21 20:02:47,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10789 conditions, 1865 events. 1115/1865 cut-off events. For 17546/17551 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9936 event pairs, 306 based on Foata normal form. 8/1867 useless extension candidates. Maximal degree in co-relation 10740. Up to 1554 conditions per place. [2024-06-21 20:02:47,340 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 128 selfloop transitions, 16 changer transitions 0/166 dead transitions. [2024-06-21 20:02:47,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 166 transitions, 2165 flow [2024-06-21 20:02:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-21 20:02:47,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:02:47,341 INFO L175 Difference]: Start difference. First operand has 103 places, 157 transitions, 1843 flow. Second operand 4 states and 100 transitions. [2024-06-21 20:02:47,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 166 transitions, 2165 flow [2024-06-21 20:02:47,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 166 transitions, 2087 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:47,377 INFO L231 Difference]: Finished difference. Result has 106 places, 157 transitions, 1807 flow [2024-06-21 20:02:47,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1807, PETRI_PLACES=106, PETRI_TRANSITIONS=157} [2024-06-21 20:02:47,378 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-21 20:02:47,378 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 157 transitions, 1807 flow [2024-06-21 20:02:47,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:47,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:47,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:02:47,379 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:47,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:47,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1546136027, now seen corresponding path program 1 times [2024-06-21 20:02:47,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:47,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678149283] [2024-06-21 20:02:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:47,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:47,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:47,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678149283] [2024-06-21 20:02:47,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678149283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:47,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:47,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:47,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465390133] [2024-06-21 20:02:47,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:47,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:47,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:47,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:47,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:47,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:47,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 157 transitions, 1807 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:47,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:47,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:47,776 INFO L124 PetriNetUnfolderBase]: 1177/1946 cut-off events. [2024-06-21 20:02:47,777 INFO L125 PetriNetUnfolderBase]: For 20993/21065 co-relation queries the response was YES. [2024-06-21 20:02:47,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11468 conditions, 1946 events. 1177/1946 cut-off events. For 20993/21065 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10326 event pairs, 185 based on Foata normal form. 13/1909 useless extension candidates. Maximal degree in co-relation 11416. Up to 1537 conditions per place. [2024-06-21 20:02:47,793 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 128 selfloop transitions, 33 changer transitions 0/186 dead transitions. [2024-06-21 20:02:47,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 186 transitions, 2319 flow [2024-06-21 20:02:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:02:47,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-21 20:02:47,794 INFO L175 Difference]: Start difference. First operand has 106 places, 157 transitions, 1807 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:02:47,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 186 transitions, 2319 flow [2024-06-21 20:02:47,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 2287 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:47,834 INFO L231 Difference]: Finished difference. Result has 109 places, 161 transitions, 1908 flow [2024-06-21 20:02:47,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1908, PETRI_PLACES=109, PETRI_TRANSITIONS=161} [2024-06-21 20:02:47,835 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-21 20:02:47,835 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 161 transitions, 1908 flow [2024-06-21 20:02:47,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:47,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:47,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:02:47,836 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:47,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:47,836 INFO L85 PathProgramCache]: Analyzing trace with hash 172091409, now seen corresponding path program 2 times [2024-06-21 20:02:47,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:47,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636317293] [2024-06-21 20:02:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:47,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:47,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:47,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636317293] [2024-06-21 20:02:47,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636317293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:47,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:47,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:47,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118173942] [2024-06-21 20:02:47,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:47,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:47,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:47,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:47,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:47,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:47,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 161 transitions, 1908 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:47,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:47,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:48,211 INFO L124 PetriNetUnfolderBase]: 1164/1931 cut-off events. [2024-06-21 20:02:48,211 INFO L125 PetriNetUnfolderBase]: For 23057/23136 co-relation queries the response was YES. [2024-06-21 20:02:48,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11675 conditions, 1931 events. 1164/1931 cut-off events. For 23057/23136 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10223 event pairs, 252 based on Foata normal form. 11/1891 useless extension candidates. Maximal degree in co-relation 11622. Up to 1585 conditions per place. [2024-06-21 20:02:48,227 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 29 changer transitions 0/179 dead transitions. [2024-06-21 20:02:48,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 179 transitions, 2284 flow [2024-06-21 20:02:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 20:02:48,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-21 20:02:48,228 INFO L175 Difference]: Start difference. First operand has 109 places, 161 transitions, 1908 flow. Second operand 5 states and 127 transitions. [2024-06-21 20:02:48,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 179 transitions, 2284 flow [2024-06-21 20:02:48,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 179 transitions, 2218 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:48,275 INFO L231 Difference]: Finished difference. Result has 112 places, 161 transitions, 1909 flow [2024-06-21 20:02:48,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1909, PETRI_PLACES=112, PETRI_TRANSITIONS=161} [2024-06-21 20:02:48,275 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-21 20:02:48,276 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 161 transitions, 1909 flow [2024-06-21 20:02:48,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:48,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:48,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:48,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:02:48,279 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:48,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:48,279 INFO L85 PathProgramCache]: Analyzing trace with hash -572086597, now seen corresponding path program 3 times [2024-06-21 20:02:48,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:48,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55458200] [2024-06-21 20:02:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:48,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:48,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:48,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55458200] [2024-06-21 20:02:48,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55458200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:48,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:48,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:48,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888768336] [2024-06-21 20:02:48,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:48,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:48,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:48,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:48,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 161 transitions, 1909 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:48,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:48,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:48,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:48,644 INFO L124 PetriNetUnfolderBase]: 1151/1912 cut-off events. [2024-06-21 20:02:48,645 INFO L125 PetriNetUnfolderBase]: For 23943/24010 co-relation queries the response was YES. [2024-06-21 20:02:48,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11593 conditions, 1912 events. 1151/1912 cut-off events. For 23943/24010 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10137 event pairs, 247 based on Foata normal form. 7/1869 useless extension candidates. Maximal degree in co-relation 11538. Up to 1552 conditions per place. [2024-06-21 20:02:48,661 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 126 selfloop transitions, 34 changer transitions 0/185 dead transitions. [2024-06-21 20:02:48,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 185 transitions, 2339 flow [2024-06-21 20:02:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 20:02:48,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-21 20:02:48,663 INFO L175 Difference]: Start difference. First operand has 112 places, 161 transitions, 1909 flow. Second operand 6 states and 149 transitions. [2024-06-21 20:02:48,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 185 transitions, 2339 flow [2024-06-21 20:02:48,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 185 transitions, 2275 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:48,710 INFO L231 Difference]: Finished difference. Result has 114 places, 163 transitions, 1957 flow [2024-06-21 20:02:48,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1957, PETRI_PLACES=114, PETRI_TRANSITIONS=163} [2024-06-21 20:02:48,710 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-21 20:02:48,711 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 163 transitions, 1957 flow [2024-06-21 20:02:48,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:48,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:48,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:48,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:02:48,711 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:48,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1427803199, now seen corresponding path program 1 times [2024-06-21 20:02:48,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:48,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510853175] [2024-06-21 20:02:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:48,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:48,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:48,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510853175] [2024-06-21 20:02:48,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510853175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:48,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:48,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:48,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603677254] [2024-06-21 20:02:48,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:48,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:48,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:48,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:48,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:48,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 163 transitions, 1957 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:48,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:48,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:48,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:49,209 INFO L124 PetriNetUnfolderBase]: 1318/2170 cut-off events. [2024-06-21 20:02:49,209 INFO L125 PetriNetUnfolderBase]: For 28300/28307 co-relation queries the response was YES. [2024-06-21 20:02:49,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12908 conditions, 2170 events. 1318/2170 cut-off events. For 28300/28307 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11548 event pairs, 261 based on Foata normal form. 30/2197 useless extension candidates. Maximal degree in co-relation 12852. Up to 1659 conditions per place. [2024-06-21 20:02:49,224 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 132 selfloop transitions, 56 changer transitions 0/195 dead transitions. [2024-06-21 20:02:49,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 195 transitions, 2527 flow [2024-06-21 20:02:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:02:49,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:02:49,226 INFO L175 Difference]: Start difference. First operand has 114 places, 163 transitions, 1957 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:02:49,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 195 transitions, 2527 flow [2024-06-21 20:02:49,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 195 transitions, 2441 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:49,272 INFO L231 Difference]: Finished difference. Result has 118 places, 167 transitions, 2066 flow [2024-06-21 20:02:49,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2066, PETRI_PLACES=118, PETRI_TRANSITIONS=167} [2024-06-21 20:02:49,273 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-21 20:02:49,273 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 167 transitions, 2066 flow [2024-06-21 20:02:49,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:49,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:49,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:49,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:02:49,273 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:49,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:49,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1069420051, now seen corresponding path program 2 times [2024-06-21 20:02:49,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:49,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846884928] [2024-06-21 20:02:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:49,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:49,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:49,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846884928] [2024-06-21 20:02:49,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846884928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:49,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:49,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:49,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171489701] [2024-06-21 20:02:49,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:49,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:49,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:49,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:49,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:49,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 167 transitions, 2066 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:49,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:49,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:49,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:49,693 INFO L124 PetriNetUnfolderBase]: 1335/2193 cut-off events. [2024-06-21 20:02:49,693 INFO L125 PetriNetUnfolderBase]: For 28568/28575 co-relation queries the response was YES. [2024-06-21 20:02:49,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13576 conditions, 2193 events. 1335/2193 cut-off events. For 28568/28575 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11639 event pairs, 291 based on Foata normal form. 10/2200 useless extension candidates. Maximal degree in co-relation 13519. Up to 1912 conditions per place. [2024-06-21 20:02:49,711 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 158 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2024-06-21 20:02:49,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 193 transitions, 2526 flow [2024-06-21 20:02:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:02:49,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 20:02:49,712 INFO L175 Difference]: Start difference. First operand has 118 places, 167 transitions, 2066 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:02:49,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 193 transitions, 2526 flow [2024-06-21 20:02:49,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 193 transitions, 2387 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:49,762 INFO L231 Difference]: Finished difference. Result has 119 places, 169 transitions, 2022 flow [2024-06-21 20:02:49,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2022, PETRI_PLACES=119, PETRI_TRANSITIONS=169} [2024-06-21 20:02:49,763 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-21 20:02:49,763 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 169 transitions, 2022 flow [2024-06-21 20:02:49,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:49,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:49,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:49,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:02:49,763 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:49,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:49,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1077990931, now seen corresponding path program 3 times [2024-06-21 20:02:49,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:49,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411407263] [2024-06-21 20:02:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:49,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:49,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:49,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411407263] [2024-06-21 20:02:49,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411407263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:49,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:49,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:49,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381693635] [2024-06-21 20:02:49,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:49,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:49,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:49,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:49,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:49,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:49,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 169 transitions, 2022 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:49,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:49,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:49,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:50,133 INFO L124 PetriNetUnfolderBase]: 1327/2185 cut-off events. [2024-06-21 20:02:50,134 INFO L125 PetriNetUnfolderBase]: For 29128/29135 co-relation queries the response was YES. [2024-06-21 20:02:50,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13288 conditions, 2185 events. 1327/2185 cut-off events. For 29128/29135 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11612 event pairs, 260 based on Foata normal form. 10/2192 useless extension candidates. Maximal degree in co-relation 13230. Up to 1836 conditions per place. [2024-06-21 20:02:50,152 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 157 selfloop transitions, 33 changer transitions 0/197 dead transitions. [2024-06-21 20:02:50,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 2504 flow [2024-06-21 20:02:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:02:50,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 20:02:50,153 INFO L175 Difference]: Start difference. First operand has 119 places, 169 transitions, 2022 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:02:50,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 2504 flow [2024-06-21 20:02:50,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 197 transitions, 2427 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:50,235 INFO L231 Difference]: Finished difference. Result has 122 places, 172 transitions, 2074 flow [2024-06-21 20:02:50,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2074, PETRI_PLACES=122, PETRI_TRANSITIONS=172} [2024-06-21 20:02:50,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-21 20:02:50,235 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 172 transitions, 2074 flow [2024-06-21 20:02:50,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:50,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:50,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:50,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:02:50,236 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:50,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:50,236 INFO L85 PathProgramCache]: Analyzing trace with hash -685575289, now seen corresponding path program 1 times [2024-06-21 20:02:50,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:50,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835162199] [2024-06-21 20:02:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:50,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:50,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:50,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835162199] [2024-06-21 20:02:50,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835162199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:50,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:50,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:50,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878641173] [2024-06-21 20:02:50,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:50,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:02:50,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:50,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:02:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:02:50,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:50,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 172 transitions, 2074 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:50,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:50,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:50,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:50,930 INFO L124 PetriNetUnfolderBase]: 2300/3837 cut-off events. [2024-06-21 20:02:50,930 INFO L125 PetriNetUnfolderBase]: For 69604/69608 co-relation queries the response was YES. [2024-06-21 20:02:50,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22709 conditions, 3837 events. 2300/3837 cut-off events. For 69604/69608 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23557 event pairs, 355 based on Foata normal form. 55/3887 useless extension candidates. Maximal degree in co-relation 22649. Up to 1837 conditions per place. [2024-06-21 20:02:50,962 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 171 selfloop transitions, 68 changer transitions 0/246 dead transitions. [2024-06-21 20:02:50,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 246 transitions, 3243 flow [2024-06-21 20:02:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-21 20:02:50,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.678125 [2024-06-21 20:02:50,965 INFO L175 Difference]: Start difference. First operand has 122 places, 172 transitions, 2074 flow. Second operand 8 states and 217 transitions. [2024-06-21 20:02:50,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 246 transitions, 3243 flow [2024-06-21 20:02:51,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 246 transitions, 3152 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:51,054 INFO L231 Difference]: Finished difference. Result has 128 places, 191 transitions, 2464 flow [2024-06-21 20:02:51,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2464, PETRI_PLACES=128, PETRI_TRANSITIONS=191} [2024-06-21 20:02:51,055 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-21 20:02:51,055 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 191 transitions, 2464 flow [2024-06-21 20:02:51,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:51,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:51,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:51,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:02:51,057 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:51,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:51,057 INFO L85 PathProgramCache]: Analyzing trace with hash -767542705, now seen corresponding path program 2 times [2024-06-21 20:02:51,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:51,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689704035] [2024-06-21 20:02:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:51,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:51,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:51,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689704035] [2024-06-21 20:02:51,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689704035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:51,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:51,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:51,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146233481] [2024-06-21 20:02:51,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:51,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:02:51,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:51,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:02:51,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:02:51,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:51,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 191 transitions, 2464 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:51,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:51,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:51,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:51,717 INFO L124 PetriNetUnfolderBase]: 2449/4118 cut-off events. [2024-06-21 20:02:51,717 INFO L125 PetriNetUnfolderBase]: For 78434/78438 co-relation queries the response was YES. [2024-06-21 20:02:51,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25017 conditions, 4118 events. 2449/4118 cut-off events. For 78434/78438 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25818 event pairs, 706 based on Foata normal form. 51/4162 useless extension candidates. Maximal degree in co-relation 24954. Up to 3206 conditions per place. [2024-06-21 20:02:51,750 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 150 selfloop transitions, 66 changer transitions 0/223 dead transitions. [2024-06-21 20:02:51,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 223 transitions, 3103 flow [2024-06-21 20:02:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:51,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:02:51,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 20:02:51,752 INFO L175 Difference]: Start difference. First operand has 128 places, 191 transitions, 2464 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:02:51,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 223 transitions, 3103 flow [2024-06-21 20:02:51,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 223 transitions, 2936 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:51,893 INFO L231 Difference]: Finished difference. Result has 132 places, 194 transitions, 2514 flow [2024-06-21 20:02:51,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2514, PETRI_PLACES=132, PETRI_TRANSITIONS=194} [2024-06-21 20:02:51,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-21 20:02:51,894 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 194 transitions, 2514 flow [2024-06-21 20:02:51,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:51,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:51,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:51,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:02:51,894 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:51,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1039867675, now seen corresponding path program 3 times [2024-06-21 20:02:51,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:51,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781222933] [2024-06-21 20:02:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:51,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:52,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:52,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781222933] [2024-06-21 20:02:52,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781222933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:52,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:52,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:52,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662416638] [2024-06-21 20:02:52,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:52,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:02:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:52,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:02:52,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:02:52,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:52,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 194 transitions, 2514 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:52,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:52,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:52,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:52,583 INFO L124 PetriNetUnfolderBase]: 2560/4329 cut-off events. [2024-06-21 20:02:52,583 INFO L125 PetriNetUnfolderBase]: For 80929/80933 co-relation queries the response was YES. [2024-06-21 20:02:52,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25401 conditions, 4329 events. 2560/4329 cut-off events. For 80929/80933 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27716 event pairs, 642 based on Foata normal form. 55/4379 useless extension candidates. Maximal degree in co-relation 25336. Up to 2608 conditions per place. [2024-06-21 20:02:52,618 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 169 selfloop transitions, 64 changer transitions 0/240 dead transitions. [2024-06-21 20:02:52,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 240 transitions, 3378 flow [2024-06-21 20:02:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 20:02:52,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-06-21 20:02:52,619 INFO L175 Difference]: Start difference. First operand has 132 places, 194 transitions, 2514 flow. Second operand 7 states and 185 transitions. [2024-06-21 20:02:52,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 240 transitions, 3378 flow [2024-06-21 20:02:52,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 240 transitions, 3270 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:52,739 INFO L231 Difference]: Finished difference. Result has 136 places, 203 transitions, 2742 flow [2024-06-21 20:02:52,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2742, PETRI_PLACES=136, PETRI_TRANSITIONS=203} [2024-06-21 20:02:52,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-21 20:02:52,739 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 203 transitions, 2742 flow [2024-06-21 20:02:52,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:52,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:52,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:52,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:02:52,740 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:52,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:52,740 INFO L85 PathProgramCache]: Analyzing trace with hash -554666161, now seen corresponding path program 4 times [2024-06-21 20:02:52,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:52,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818685803] [2024-06-21 20:02:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:52,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:52,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:52,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818685803] [2024-06-21 20:02:52,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818685803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:52,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:52,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:52,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110537196] [2024-06-21 20:02:52,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:52,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:02:52,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:52,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:02:52,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:02:52,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:52,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 203 transitions, 2742 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:52,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:52,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:52,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:53,468 INFO L124 PetriNetUnfolderBase]: 2747/4658 cut-off events. [2024-06-21 20:02:53,468 INFO L125 PetriNetUnfolderBase]: For 90599/90603 co-relation queries the response was YES. [2024-06-21 20:02:53,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27492 conditions, 4658 events. 2747/4658 cut-off events. For 90599/90603 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30383 event pairs, 899 based on Foata normal form. 51/4704 useless extension candidates. Maximal degree in co-relation 27425. Up to 3698 conditions per place. [2024-06-21 20:02:53,507 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 142 selfloop transitions, 97 changer transitions 0/246 dead transitions. [2024-06-21 20:02:53,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 246 transitions, 3500 flow [2024-06-21 20:02:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-21 20:02:53,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6175 [2024-06-21 20:02:53,508 INFO L175 Difference]: Start difference. First operand has 136 places, 203 transitions, 2742 flow. Second operand 10 states and 247 transitions. [2024-06-21 20:02:53,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 246 transitions, 3500 flow [2024-06-21 20:02:53,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 246 transitions, 3377 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:53,669 INFO L231 Difference]: Finished difference. Result has 143 places, 205 transitions, 2882 flow [2024-06-21 20:02:53,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2882, PETRI_PLACES=143, PETRI_TRANSITIONS=205} [2024-06-21 20:02:53,670 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-21 20:02:53,670 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 205 transitions, 2882 flow [2024-06-21 20:02:53,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:53,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:53,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:02:53,670 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:53,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:53,670 INFO L85 PathProgramCache]: Analyzing trace with hash -549303781, now seen corresponding path program 5 times [2024-06-21 20:02:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:53,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418289151] [2024-06-21 20:02:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:53,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:53,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418289151] [2024-06-21 20:02:53,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418289151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:53,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:53,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:53,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432743909] [2024-06-21 20:02:53,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:53,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:02:53,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:53,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:02:53,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:02:53,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:53,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 205 transitions, 2882 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:53,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:53,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:53,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:54,386 INFO L124 PetriNetUnfolderBase]: 2934/4990 cut-off events. [2024-06-21 20:02:54,387 INFO L125 PetriNetUnfolderBase]: For 98580/98584 co-relation queries the response was YES. [2024-06-21 20:02:54,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29195 conditions, 4990 events. 2934/4990 cut-off events. For 98580/98584 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33192 event pairs, 973 based on Foata normal form. 51/5036 useless extension candidates. Maximal degree in co-relation 29126. Up to 4019 conditions per place. [2024-06-21 20:02:54,428 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 134 selfloop transitions, 100 changer transitions 0/241 dead transitions. [2024-06-21 20:02:54,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 241 transitions, 3620 flow [2024-06-21 20:02:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:02:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:02:54,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-21 20:02:54,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-21 20:02:54,429 INFO L175 Difference]: Start difference. First operand has 143 places, 205 transitions, 2882 flow. Second operand 9 states and 221 transitions. [2024-06-21 20:02:54,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 241 transitions, 3620 flow [2024-06-21 20:02:54,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 241 transitions, 3383 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:54,664 INFO L231 Difference]: Finished difference. Result has 144 places, 207 transitions, 2918 flow [2024-06-21 20:02:54,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2918, PETRI_PLACES=144, PETRI_TRANSITIONS=207} [2024-06-21 20:02:54,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 20:02:54,665 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 207 transitions, 2918 flow [2024-06-21 20:02:54,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:54,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:54,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:54,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:02:54,665 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:54,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:54,666 INFO L85 PathProgramCache]: Analyzing trace with hash -554814031, now seen corresponding path program 6 times [2024-06-21 20:02:54,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:54,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156934741] [2024-06-21 20:02:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:54,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:54,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:54,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156934741] [2024-06-21 20:02:54,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156934741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:54,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:54,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:54,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096025526] [2024-06-21 20:02:54,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:54,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:02:54,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:54,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:02:54,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:02:54,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:54,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 207 transitions, 2918 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:54,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:54,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:54,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:55,621 INFO L124 PetriNetUnfolderBase]: 3266/5581 cut-off events. [2024-06-21 20:02:55,622 INFO L125 PetriNetUnfolderBase]: For 113600/113604 co-relation queries the response was YES. [2024-06-21 20:02:55,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32390 conditions, 5581 events. 3266/5581 cut-off events. For 113600/113604 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 38320 event pairs, 1050 based on Foata normal form. 43/5619 useless extension candidates. Maximal degree in co-relation 32320. Up to 3642 conditions per place. [2024-06-21 20:02:55,664 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 154 selfloop transitions, 100 changer transitions 0/261 dead transitions. [2024-06-21 20:02:55,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 261 transitions, 3872 flow [2024-06-21 20:02:55,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-21 20:02:55,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-21 20:02:55,666 INFO L175 Difference]: Start difference. First operand has 144 places, 207 transitions, 2918 flow. Second operand 10 states and 252 transitions. [2024-06-21 20:02:55,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 261 transitions, 3872 flow [2024-06-21 20:02:55,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 261 transitions, 3633 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 20:02:55,933 INFO L231 Difference]: Finished difference. Result has 148 places, 212 transitions, 3034 flow [2024-06-21 20:02:55,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3034, PETRI_PLACES=148, PETRI_TRANSITIONS=212} [2024-06-21 20:02:55,934 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-21 20:02:55,934 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 212 transitions, 3034 flow [2024-06-21 20:02:55,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:55,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:55,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:55,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:02:55,935 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)] === [2024-06-21 20:02:55,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:55,935 INFO L85 PathProgramCache]: Analyzing trace with hash -549088579, now seen corresponding path program 1 times [2024-06-21 20:02:55,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:55,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043193804] [2024-06-21 20:02:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:55,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:56,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:56,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043193804] [2024-06-21 20:02:56,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043193804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:56,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:56,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:56,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726157337] [2024-06-21 20:02:56,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:56,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:02:56,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:56,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:02:56,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:02:56,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:56,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 212 transitions, 3034 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:56,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:56,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:56,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:57,085 INFO L124 PetriNetUnfolderBase]: 3590/6168 cut-off events. [2024-06-21 20:02:57,086 INFO L125 PetriNetUnfolderBase]: For 136274/136278 co-relation queries the response was YES. [2024-06-21 20:02:57,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35971 conditions, 6168 events. 3590/6168 cut-off events. For 136274/136278 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 43547 event pairs, 1122 based on Foata normal form. 43/6202 useless extension candidates. Maximal degree in co-relation 35899. Up to 3650 conditions per place. [2024-06-21 20:02:57,127 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 134 selfloop transitions, 115 changer transitions 0/256 dead transitions. [2024-06-21 20:02:57,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 256 transitions, 3940 flow [2024-06-21 20:02:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:02:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:02:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-21 20:02:57,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-21 20:02:57,129 INFO L175 Difference]: Start difference. First operand has 148 places, 212 transitions, 3034 flow. Second operand 9 states and 227 transitions. [2024-06-21 20:02:57,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 256 transitions, 3940 flow [2024-06-21 20:02:57,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 256 transitions, 3685 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 20:02:57,393 INFO L231 Difference]: Finished difference. Result has 150 places, 215 transitions, 3123 flow [2024-06-21 20:02:57,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2781, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3123, PETRI_PLACES=150, PETRI_TRANSITIONS=215} [2024-06-21 20:02:57,394 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-21 20:02:57,394 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 215 transitions, 3123 flow [2024-06-21 20:02:57,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:57,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:57,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:57,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:02:57,394 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)] === [2024-06-21 20:02:57,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1207930883, now seen corresponding path program 7 times [2024-06-21 20:02:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353413344] [2024-06-21 20:02:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:57,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:57,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353413344] [2024-06-21 20:02:57,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353413344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:57,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:57,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:57,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126876459] [2024-06-21 20:02:57,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:57,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:02:57,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:57,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:02:57,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:02:57,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:57,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 215 transitions, 3123 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:57,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:57,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:57,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:58,368 INFO L124 PetriNetUnfolderBase]: 3623/6228 cut-off events. [2024-06-21 20:02:58,368 INFO L125 PetriNetUnfolderBase]: For 134570/134574 co-relation queries the response was YES. [2024-06-21 20:02:58,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36467 conditions, 6228 events. 3623/6228 cut-off events. For 134570/134574 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 44141 event pairs, 1374 based on Foata normal form. 17/6240 useless extension candidates. Maximal degree in co-relation 36394. Up to 5567 conditions per place. [2024-06-21 20:02:58,433 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 197 selfloop transitions, 43 changer transitions 0/247 dead transitions. [2024-06-21 20:02:58,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 247 transitions, 3731 flow [2024-06-21 20:02:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:02:58,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 20:02:58,434 INFO L175 Difference]: Start difference. First operand has 150 places, 215 transitions, 3123 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:02:58,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 247 transitions, 3731 flow [2024-06-21 20:02:58,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 247 transitions, 3548 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:58,800 INFO L231 Difference]: Finished difference. Result has 153 places, 216 transitions, 3067 flow [2024-06-21 20:02:58,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2940, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3067, PETRI_PLACES=153, PETRI_TRANSITIONS=216} [2024-06-21 20:02:58,801 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-21 20:02:58,801 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 216 transitions, 3067 flow [2024-06-21 20:02:58,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:58,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:58,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:58,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:02:58,801 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)] === [2024-06-21 20:02:58,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1207715681, now seen corresponding path program 2 times [2024-06-21 20:02:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:58,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985351823] [2024-06-21 20:02:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:58,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:58,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:58,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985351823] [2024-06-21 20:02:58,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985351823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:58,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:58,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:58,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235292025] [2024-06-21 20:02:58,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:58,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:02:58,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:58,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:02:58,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:02:58,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:58,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 216 transitions, 3067 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:58,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:58,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:58,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:59,719 INFO L124 PetriNetUnfolderBase]: 3664/6305 cut-off events. [2024-06-21 20:02:59,719 INFO L125 PetriNetUnfolderBase]: For 138660/138664 co-relation queries the response was YES. [2024-06-21 20:02:59,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36895 conditions, 6305 events. 3664/6305 cut-off events. For 138660/138664 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 44847 event pairs, 1374 based on Foata normal form. 13/6313 useless extension candidates. Maximal degree in co-relation 36820. Up to 5551 conditions per place. [2024-06-21 20:02:59,886 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 199 selfloop transitions, 45 changer transitions 0/251 dead transitions. [2024-06-21 20:02:59,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 251 transitions, 3701 flow [2024-06-21 20:02:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 20:02:59,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-21 20:02:59,887 INFO L175 Difference]: Start difference. First operand has 153 places, 216 transitions, 3067 flow. Second operand 8 states and 193 transitions. [2024-06-21 20:02:59,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 251 transitions, 3701 flow [2024-06-21 20:03:00,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 251 transitions, 3588 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:00,077 INFO L231 Difference]: Finished difference. Result has 155 places, 217 transitions, 3086 flow [2024-06-21 20:03:00,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3086, PETRI_PLACES=155, PETRI_TRANSITIONS=217} [2024-06-21 20:03:00,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-21 20:03:00,078 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 217 transitions, 3086 flow [2024-06-21 20:03:00,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:00,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:00,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:00,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:03:00,079 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)] === [2024-06-21 20:03:00,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:00,079 INFO L85 PathProgramCache]: Analyzing trace with hash -942018401, now seen corresponding path program 3 times [2024-06-21 20:03:00,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:00,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285513506] [2024-06-21 20:03:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:00,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:00,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285513506] [2024-06-21 20:03:00,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285513506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:00,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:00,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:00,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006676972] [2024-06-21 20:03:00,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:00,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:00,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:00,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:00,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:00,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:00,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 217 transitions, 3086 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:00,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:00,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:00,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:01,122 INFO L124 PetriNetUnfolderBase]: 3644/6273 cut-off events. [2024-06-21 20:03:01,126 INFO L125 PetriNetUnfolderBase]: For 141815/141819 co-relation queries the response was YES. [2024-06-21 20:03:01,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36479 conditions, 6273 events. 3644/6273 cut-off events. For 141815/141819 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 44254 event pairs, 1314 based on Foata normal form. 13/6281 useless extension candidates. Maximal degree in co-relation 36403. Up to 5018 conditions per place. [2024-06-21 20:03:01,182 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 190 selfloop transitions, 54 changer transitions 0/251 dead transitions. [2024-06-21 20:03:01,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 251 transitions, 3632 flow [2024-06-21 20:03:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:03:01,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:03:01,184 INFO L175 Difference]: Start difference. First operand has 155 places, 217 transitions, 3086 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:03:01,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 251 transitions, 3632 flow [2024-06-21 20:03:01,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 251 transitions, 3512 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:01,476 INFO L231 Difference]: Finished difference. Result has 156 places, 216 transitions, 3022 flow [2024-06-21 20:03:01,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3022, PETRI_PLACES=156, PETRI_TRANSITIONS=216} [2024-06-21 20:03:01,476 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-21 20:03:01,476 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 216 transitions, 3022 flow [2024-06-21 20:03:01,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:01,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:01,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:01,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:03:01,477 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:01,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:01,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1246283889, now seen corresponding path program 1 times [2024-06-21 20:03:01,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:01,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758919151] [2024-06-21 20:03:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:01,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:01,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:01,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758919151] [2024-06-21 20:03:01,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758919151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:01,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:01,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:01,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379427361] [2024-06-21 20:03:01,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:01,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:01,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:01,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:01,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:01,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:01,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 216 transitions, 3022 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:01,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:01,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:01,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:02,350 INFO L124 PetriNetUnfolderBase]: 3482/6049 cut-off events. [2024-06-21 20:03:02,351 INFO L125 PetriNetUnfolderBase]: For 140633/140640 co-relation queries the response was YES. [2024-06-21 20:03:02,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35307 conditions, 6049 events. 3482/6049 cut-off events. For 140633/140640 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 43593 event pairs, 1334 based on Foata normal form. 8/6010 useless extension candidates. Maximal degree in co-relation 35230. Up to 5436 conditions per place. [2024-06-21 20:03:02,403 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 176 selfloop transitions, 19 changer transitions 0/228 dead transitions. [2024-06-21 20:03:02,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 228 transitions, 3464 flow [2024-06-21 20:03:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 20:03:02,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-21 20:03:02,404 INFO L175 Difference]: Start difference. First operand has 156 places, 216 transitions, 3022 flow. Second operand 5 states and 118 transitions. [2024-06-21 20:03:02,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 228 transitions, 3464 flow [2024-06-21 20:03:02,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 228 transitions, 3265 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:02,793 INFO L231 Difference]: Finished difference. Result has 154 places, 219 transitions, 2903 flow [2024-06-21 20:03:02,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2903, PETRI_PLACES=154, PETRI_TRANSITIONS=219} [2024-06-21 20:03:02,794 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-21 20:03:02,794 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 219 transitions, 2903 flow [2024-06-21 20:03:02,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:02,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:02,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:02,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:03:02,794 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:02,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:02,795 INFO L85 PathProgramCache]: Analyzing trace with hash -186849499, now seen corresponding path program 1 times [2024-06-21 20:03:02,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:02,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584328986] [2024-06-21 20:03:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:02,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:02,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:02,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584328986] [2024-06-21 20:03:02,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584328986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:02,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:02,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:02,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570849733] [2024-06-21 20:03:02,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:02,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:02,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:02,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:02,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:02,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:02,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 219 transitions, 2903 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:02,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:02,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:02,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:03,752 INFO L124 PetriNetUnfolderBase]: 3635/6275 cut-off events. [2024-06-21 20:03:03,753 INFO L125 PetriNetUnfolderBase]: For 148824/148824 co-relation queries the response was YES. [2024-06-21 20:03:03,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36827 conditions, 6275 events. 3635/6275 cut-off events. For 148824/148824 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44818 event pairs, 1342 based on Foata normal form. 1/6274 useless extension candidates. Maximal degree in co-relation 36751. Up to 5774 conditions per place. [2024-06-21 20:03:03,805 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 216 selfloop transitions, 38 changer transitions 0/261 dead transitions. [2024-06-21 20:03:03,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 261 transitions, 3922 flow [2024-06-21 20:03:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 20:03:03,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-21 20:03:03,806 INFO L175 Difference]: Start difference. First operand has 154 places, 219 transitions, 2903 flow. Second operand 6 states and 143 transitions. [2024-06-21 20:03:03,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 261 transitions, 3922 flow [2024-06-21 20:03:04,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 261 transitions, 3858 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:04,037 INFO L231 Difference]: Finished difference. Result has 160 places, 242 transitions, 3394 flow [2024-06-21 20:03:04,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3394, PETRI_PLACES=160, PETRI_TRANSITIONS=242} [2024-06-21 20:03:04,038 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-21 20:03:04,038 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 242 transitions, 3394 flow [2024-06-21 20:03:04,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:04,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:04,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:04,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:03:04,039 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:04,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1423646607, now seen corresponding path program 1 times [2024-06-21 20:03:04,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:04,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4758334] [2024-06-21 20:03:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:04,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:04,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:04,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4758334] [2024-06-21 20:03:04,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4758334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:04,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:04,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:04,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370350187] [2024-06-21 20:03:04,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:04,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:04,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:04,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:04,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:04,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:04,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 242 transitions, 3394 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:04,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:04,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:04,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:05,075 INFO L124 PetriNetUnfolderBase]: 3642/6291 cut-off events. [2024-06-21 20:03:05,075 INFO L125 PetriNetUnfolderBase]: For 161386/161393 co-relation queries the response was YES. [2024-06-21 20:03:05,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38255 conditions, 6291 events. 3642/6291 cut-off events. For 161386/161393 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45003 event pairs, 1362 based on Foata normal form. 10/6298 useless extension candidates. Maximal degree in co-relation 38175. Up to 5756 conditions per place. [2024-06-21 20:03:05,125 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 219 selfloop transitions, 40 changer transitions 2/268 dead transitions. [2024-06-21 20:03:05,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 268 transitions, 4133 flow [2024-06-21 20:03:05,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-21 20:03:05,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-21 20:03:05,126 INFO L175 Difference]: Start difference. First operand has 160 places, 242 transitions, 3394 flow. Second operand 7 states and 159 transitions. [2024-06-21 20:03:05,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 268 transitions, 4133 flow [2024-06-21 20:03:05,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 268 transitions, 4069 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:05,427 INFO L231 Difference]: Finished difference. Result has 168 places, 251 transitions, 3580 flow [2024-06-21 20:03:05,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3580, PETRI_PLACES=168, PETRI_TRANSITIONS=251} [2024-06-21 20:03:05,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-21 20:03:05,427 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 251 transitions, 3580 flow [2024-06-21 20:03:05,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:05,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:05,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:05,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:03:05,428 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:05,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:05,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1106322029, now seen corresponding path program 2 times [2024-06-21 20:03:05,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:05,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983207120] [2024-06-21 20:03:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:05,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:05,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:05,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983207120] [2024-06-21 20:03:05,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983207120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:05,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:05,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:05,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523407222] [2024-06-21 20:03:05,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:05,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:05,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:05,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:05,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:05,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:05,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 251 transitions, 3580 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:05,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:05,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:05,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:06,534 INFO L124 PetriNetUnfolderBase]: 3645/6301 cut-off events. [2024-06-21 20:03:06,534 INFO L125 PetriNetUnfolderBase]: For 170525/170535 co-relation queries the response was YES. [2024-06-21 20:03:06,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38724 conditions, 6301 events. 3645/6301 cut-off events. For 170525/170535 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 45098 event pairs, 1360 based on Foata normal form. 10/6305 useless extension candidates. Maximal degree in co-relation 38640. Up to 5676 conditions per place. [2024-06-21 20:03:06,605 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 187 selfloop transitions, 77 changer transitions 1/272 dead transitions. [2024-06-21 20:03:06,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 272 transitions, 4343 flow [2024-06-21 20:03:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:06,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 20:03:06,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-21 20:03:06,606 INFO L175 Difference]: Start difference. First operand has 168 places, 251 transitions, 3580 flow. Second operand 6 states and 143 transitions. [2024-06-21 20:03:06,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 272 transitions, 4343 flow [2024-06-21 20:03:07,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 272 transitions, 4235 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:07,151 INFO L231 Difference]: Finished difference. Result has 171 places, 256 transitions, 3731 flow [2024-06-21 20:03:07,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3731, PETRI_PLACES=171, PETRI_TRANSITIONS=256} [2024-06-21 20:03:07,152 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-21 20:03:07,152 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 256 transitions, 3731 flow [2024-06-21 20:03:07,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:07,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:07,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:07,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:03:07,153 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:07,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1106084879, now seen corresponding path program 3 times [2024-06-21 20:03:07,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:07,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210322991] [2024-06-21 20:03:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:07,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:07,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:07,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210322991] [2024-06-21 20:03:07,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210322991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:07,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:07,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:07,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935364252] [2024-06-21 20:03:07,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:07,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:07,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:07,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:07,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:07,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:07,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 256 transitions, 3731 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:07,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:07,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:07,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:08,180 INFO L124 PetriNetUnfolderBase]: 3540/6097 cut-off events. [2024-06-21 20:03:08,180 INFO L125 PetriNetUnfolderBase]: For 174386/174393 co-relation queries the response was YES. [2024-06-21 20:03:08,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37678 conditions, 6097 events. 3540/6097 cut-off events. For 174386/174393 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43121 event pairs, 1308 based on Foata normal form. 12/6106 useless extension candidates. Maximal degree in co-relation 37593. Up to 5498 conditions per place. [2024-06-21 20:03:08,230 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 186 selfloop transitions, 76 changer transitions 5/274 dead transitions. [2024-06-21 20:03:08,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 274 transitions, 4326 flow [2024-06-21 20:03:08,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:08,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:03:08,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 20:03:08,231 INFO L175 Difference]: Start difference. First operand has 171 places, 256 transitions, 3731 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:03:08,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 274 transitions, 4326 flow [2024-06-21 20:03:08,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 274 transitions, 4190 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:08,587 INFO L231 Difference]: Finished difference. Result has 175 places, 251 transitions, 3689 flow [2024-06-21 20:03:08,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3689, PETRI_PLACES=175, PETRI_TRANSITIONS=251} [2024-06-21 20:03:08,587 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-21 20:03:08,587 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 251 transitions, 3689 flow [2024-06-21 20:03:08,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:08,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:08,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:08,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:03:08,588 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:08,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:08,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1106330957, now seen corresponding path program 1 times [2024-06-21 20:03:08,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:08,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493542394] [2024-06-21 20:03:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:08,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:08,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:08,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493542394] [2024-06-21 20:03:08,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493542394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:08,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:08,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:08,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445715920] [2024-06-21 20:03:08,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:08,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:08,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:08,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:08,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:08,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 251 transitions, 3689 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:08,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:08,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:08,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:09,486 INFO L124 PetriNetUnfolderBase]: 3225/5582 cut-off events. [2024-06-21 20:03:09,486 INFO L125 PetriNetUnfolderBase]: For 182284/182295 co-relation queries the response was YES. [2024-06-21 20:03:09,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35282 conditions, 5582 events. 3225/5582 cut-off events. For 182284/182295 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 39063 event pairs, 1158 based on Foata normal form. 22/5573 useless extension candidates. Maximal degree in co-relation 35196. Up to 4935 conditions per place. [2024-06-21 20:03:09,538 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 207 selfloop transitions, 22 changer transitions 0/266 dead transitions. [2024-06-21 20:03:09,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 266 transitions, 4221 flow [2024-06-21 20:03:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 20:03:09,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-21 20:03:09,539 INFO L175 Difference]: Start difference. First operand has 175 places, 251 transitions, 3689 flow. Second operand 5 states and 121 transitions. [2024-06-21 20:03:09,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 266 transitions, 4221 flow [2024-06-21 20:03:09,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 266 transitions, 4029 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:09,957 INFO L231 Difference]: Finished difference. Result has 173 places, 253 transitions, 3578 flow [2024-06-21 20:03:09,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3497, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3578, PETRI_PLACES=173, PETRI_TRANSITIONS=253} [2024-06-21 20:03:09,958 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-21 20:03:09,958 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 253 transitions, 3578 flow [2024-06-21 20:03:09,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:09,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:09,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:09,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:03:09,958 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:09,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1187095605, now seen corresponding path program 1 times [2024-06-21 20:03:09,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:09,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567234578] [2024-06-21 20:03:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:09,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:10,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:10,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567234578] [2024-06-21 20:03:10,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567234578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:10,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:10,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:10,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818902422] [2024-06-21 20:03:10,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:10,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:10,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:10,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:10,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:10,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:10,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 253 transitions, 3578 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:10,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:10,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:10,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:10,928 INFO L124 PetriNetUnfolderBase]: 3343/5737 cut-off events. [2024-06-21 20:03:10,928 INFO L125 PetriNetUnfolderBase]: For 171578/171578 co-relation queries the response was YES. [2024-06-21 20:03:10,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36080 conditions, 5737 events. 3343/5737 cut-off events. For 171578/171578 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 39747 event pairs, 1210 based on Foata normal form. 1/5736 useless extension candidates. Maximal degree in co-relation 35993. Up to 5282 conditions per place. [2024-06-21 20:03:10,999 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 225 selfloop transitions, 42 changer transitions 0/274 dead transitions. [2024-06-21 20:03:11,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 274 transitions, 4215 flow [2024-06-21 20:03:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:11,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 20:03:11,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 20:03:11,001 INFO L175 Difference]: Start difference. First operand has 173 places, 253 transitions, 3578 flow. Second operand 7 states and 160 transitions. [2024-06-21 20:03:11,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 274 transitions, 4215 flow [2024-06-21 20:03:11,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 274 transitions, 4140 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:11,426 INFO L231 Difference]: Finished difference. Result has 177 places, 254 transitions, 3614 flow [2024-06-21 20:03:11,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3614, PETRI_PLACES=177, PETRI_TRANSITIONS=254} [2024-06-21 20:03:11,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-21 20:03:11,427 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 254 transitions, 3614 flow [2024-06-21 20:03:11,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:11,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:11,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:11,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:03:11,428 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:11,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:11,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1697775988, now seen corresponding path program 1 times [2024-06-21 20:03:11,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:11,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51723020] [2024-06-21 20:03:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:11,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:11,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:11,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51723020] [2024-06-21 20:03:11,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51723020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:11,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:11,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:11,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606125547] [2024-06-21 20:03:11,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:11,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:11,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:11,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:11,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:11,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:11,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 254 transitions, 3614 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:11,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:11,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:11,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:12,396 INFO L124 PetriNetUnfolderBase]: 3356/5761 cut-off events. [2024-06-21 20:03:12,396 INFO L125 PetriNetUnfolderBase]: For 180560/180567 co-relation queries the response was YES. [2024-06-21 20:03:12,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36462 conditions, 5761 events. 3356/5761 cut-off events. For 180560/180567 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 39873 event pairs, 1216 based on Foata normal form. 7/5765 useless extension candidates. Maximal degree in co-relation 36374. Up to 5189 conditions per place. [2024-06-21 20:03:12,460 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 183 selfloop transitions, 89 changer transitions 0/279 dead transitions. [2024-06-21 20:03:12,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 279 transitions, 4378 flow [2024-06-21 20:03:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 20:03:12,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-21 20:03:12,462 INFO L175 Difference]: Start difference. First operand has 177 places, 254 transitions, 3614 flow. Second operand 8 states and 183 transitions. [2024-06-21 20:03:12,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 279 transitions, 4378 flow [2024-06-21 20:03:12,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 279 transitions, 4258 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:12,914 INFO L231 Difference]: Finished difference. Result has 181 places, 260 transitions, 3836 flow [2024-06-21 20:03:12,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3836, PETRI_PLACES=181, PETRI_TRANSITIONS=260} [2024-06-21 20:03:12,914 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-21 20:03:12,915 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 260 transitions, 3836 flow [2024-06-21 20:03:12,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:12,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:12,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:12,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:03:12,915 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:12,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:12,916 INFO L85 PathProgramCache]: Analyzing trace with hash 814851012, now seen corresponding path program 2 times [2024-06-21 20:03:12,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:12,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33317593] [2024-06-21 20:03:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:12,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:13,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:13,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33317593] [2024-06-21 20:03:13,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33317593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:13,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:13,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:13,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208542806] [2024-06-21 20:03:13,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:13,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:13,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:13,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:13,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:13,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:13,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 260 transitions, 3836 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:13,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:13,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:13,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:13,890 INFO L124 PetriNetUnfolderBase]: 3377/5796 cut-off events. [2024-06-21 20:03:13,891 INFO L125 PetriNetUnfolderBase]: For 186766/186773 co-relation queries the response was YES. [2024-06-21 20:03:13,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37693 conditions, 5796 events. 3377/5796 cut-off events. For 186766/186773 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40136 event pairs, 1214 based on Foata normal form. 7/5800 useless extension candidates. Maximal degree in co-relation 37603. Up to 5161 conditions per place. [2024-06-21 20:03:13,954 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 195 selfloop transitions, 98 changer transitions 0/300 dead transitions. [2024-06-21 20:03:13,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 300 transitions, 4980 flow [2024-06-21 20:03:13,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:03:13,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 20:03:13,956 INFO L175 Difference]: Start difference. First operand has 181 places, 260 transitions, 3836 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:03:13,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 300 transitions, 4980 flow [2024-06-21 20:03:14,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 300 transitions, 4835 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:14,469 INFO L231 Difference]: Finished difference. Result has 186 places, 277 transitions, 4277 flow [2024-06-21 20:03:14,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3701, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4277, PETRI_PLACES=186, PETRI_TRANSITIONS=277} [2024-06-21 20:03:14,470 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-21 20:03:14,470 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 277 transitions, 4277 flow [2024-06-21 20:03:14,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:14,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:14,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:14,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:03:14,471 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:14,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1854729140, now seen corresponding path program 3 times [2024-06-21 20:03:14,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:14,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426035139] [2024-06-21 20:03:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:14,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:14,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426035139] [2024-06-21 20:03:14,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426035139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:14,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:14,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020114906] [2024-06-21 20:03:14,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:14,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:14,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:14,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 277 transitions, 4277 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:14,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:14,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:14,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:15,450 INFO L124 PetriNetUnfolderBase]: 3382/5802 cut-off events. [2024-06-21 20:03:15,450 INFO L125 PetriNetUnfolderBase]: For 192689/192696 co-relation queries the response was YES. [2024-06-21 20:03:15,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38894 conditions, 5802 events. 3382/5802 cut-off events. For 192689/192696 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40180 event pairs, 1214 based on Foata normal form. 7/5806 useless extension candidates. Maximal degree in co-relation 38800. Up to 5165 conditions per place. [2024-06-21 20:03:15,517 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 191 selfloop transitions, 101 changer transitions 0/299 dead transitions. [2024-06-21 20:03:15,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 299 transitions, 5124 flow [2024-06-21 20:03:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:03:15,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:03:15,518 INFO L175 Difference]: Start difference. First operand has 186 places, 277 transitions, 4277 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:03:15,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 299 transitions, 5124 flow [2024-06-21 20:03:16,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 299 transitions, 4986 flow, removed 69 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:16,027 INFO L231 Difference]: Finished difference. Result has 193 places, 280 transitions, 4424 flow [2024-06-21 20:03:16,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4159, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4424, PETRI_PLACES=193, PETRI_TRANSITIONS=280} [2024-06-21 20:03:16,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-21 20:03:16,028 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 280 transitions, 4424 flow [2024-06-21 20:03:16,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:16,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:16,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:16,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:03:16,029 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:16,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:16,029 INFO L85 PathProgramCache]: Analyzing trace with hash 941570022, now seen corresponding path program 4 times [2024-06-21 20:03:16,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:16,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528416381] [2024-06-21 20:03:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:16,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:16,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:16,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528416381] [2024-06-21 20:03:16,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528416381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:16,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:16,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:16,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165333907] [2024-06-21 20:03:16,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:16,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:16,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:16,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:16,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 280 transitions, 4424 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:16,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:16,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:16,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:17,061 INFO L124 PetriNetUnfolderBase]: 3416/5850 cut-off events. [2024-06-21 20:03:17,061 INFO L125 PetriNetUnfolderBase]: For 199446/199453 co-relation queries the response was YES. [2024-06-21 20:03:17,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38770 conditions, 5850 events. 3416/5850 cut-off events. For 199446/199453 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40490 event pairs, 1210 based on Foata normal form. 8/5855 useless extension candidates. Maximal degree in co-relation 38673. Up to 5337 conditions per place. [2024-06-21 20:03:17,128 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 50 changer transitions 0/308 dead transitions. [2024-06-21 20:03:17,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 308 transitions, 5413 flow [2024-06-21 20:03:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 20:03:17,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 20:03:17,129 INFO L175 Difference]: Start difference. First operand has 193 places, 280 transitions, 4424 flow. Second operand 8 states and 180 transitions. [2024-06-21 20:03:17,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 308 transitions, 5413 flow [2024-06-21 20:03:17,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 308 transitions, 5202 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:17,659 INFO L231 Difference]: Finished difference. Result has 199 places, 291 transitions, 4573 flow [2024-06-21 20:03:17,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4227, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=199, PETRI_TRANSITIONS=291} [2024-06-21 20:03:17,660 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-21 20:03:17,660 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 291 transitions, 4573 flow [2024-06-21 20:03:17,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:17,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:17,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:17,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:03:17,661 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:17,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:17,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1970199056, now seen corresponding path program 1 times [2024-06-21 20:03:17,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:17,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031360223] [2024-06-21 20:03:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:17,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:17,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:17,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031360223] [2024-06-21 20:03:17,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031360223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:17,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:17,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:17,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454743688] [2024-06-21 20:03:17,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:17,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:17,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:17,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:17,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 291 transitions, 4573 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:17,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:17,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:17,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:18,708 INFO L124 PetriNetUnfolderBase]: 3418/5851 cut-off events. [2024-06-21 20:03:18,708 INFO L125 PetriNetUnfolderBase]: For 207560/207567 co-relation queries the response was YES. [2024-06-21 20:03:18,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38966 conditions, 5851 events. 3418/5851 cut-off events. For 207560/207567 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40422 event pairs, 1210 based on Foata normal form. 8/5856 useless extension candidates. Maximal degree in co-relation 38866. Up to 5341 conditions per place. [2024-06-21 20:03:18,779 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 53 changer transitions 0/311 dead transitions. [2024-06-21 20:03:18,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 311 transitions, 5431 flow [2024-06-21 20:03:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 20:03:18,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 20:03:18,781 INFO L175 Difference]: Start difference. First operand has 199 places, 291 transitions, 4573 flow. Second operand 8 states and 180 transitions. [2024-06-21 20:03:18,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 311 transitions, 5431 flow [2024-06-21 20:03:19,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 311 transitions, 5305 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:19,322 INFO L231 Difference]: Finished difference. Result has 203 places, 294 transitions, 4622 flow [2024-06-21 20:03:19,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4452, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4622, PETRI_PLACES=203, PETRI_TRANSITIONS=294} [2024-06-21 20:03:19,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-21 20:03:19,324 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 294 transitions, 4622 flow [2024-06-21 20:03:19,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:19,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:19,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:19,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:03:19,328 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:19,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:19,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1976398580, now seen corresponding path program 2 times [2024-06-21 20:03:19,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:19,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755342281] [2024-06-21 20:03:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:19,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:19,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:19,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755342281] [2024-06-21 20:03:19,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755342281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:19,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:19,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:19,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272060844] [2024-06-21 20:03:19,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:19,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:19,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:19,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:19,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:19,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 294 transitions, 4622 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:19,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:19,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:19,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:20,256 INFO L124 PetriNetUnfolderBase]: 3439/5886 cut-off events. [2024-06-21 20:03:20,257 INFO L125 PetriNetUnfolderBase]: For 219113/219123 co-relation queries the response was YES. [2024-06-21 20:03:20,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39549 conditions, 5886 events. 3439/5886 cut-off events. For 219113/219123 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40714 event pairs, 1226 based on Foata normal form. 9/5889 useless extension candidates. Maximal degree in co-relation 39448. Up to 5251 conditions per place. [2024-06-21 20:03:20,326 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 209 selfloop transitions, 104 changer transitions 0/320 dead transitions. [2024-06-21 20:03:20,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 320 transitions, 5695 flow [2024-06-21 20:03:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:20,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:03:20,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-21 20:03:20,327 INFO L175 Difference]: Start difference. First operand has 203 places, 294 transitions, 4622 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:03:20,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 320 transitions, 5695 flow [2024-06-21 20:03:20,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 320 transitions, 5545 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:20,945 INFO L231 Difference]: Finished difference. Result has 205 places, 303 transitions, 4915 flow [2024-06-21 20:03:20,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4915, PETRI_PLACES=205, PETRI_TRANSITIONS=303} [2024-06-21 20:03:20,946 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-21 20:03:20,946 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 303 transitions, 4915 flow [2024-06-21 20:03:20,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:20,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:20,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:20,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:03:20,947 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:20,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:20,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2090488820, now seen corresponding path program 5 times [2024-06-21 20:03:20,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:20,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222936321] [2024-06-21 20:03:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:20,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:21,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:21,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222936321] [2024-06-21 20:03:21,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222936321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:21,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:21,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:21,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032140424] [2024-06-21 20:03:21,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:21,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:21,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:21,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:21,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:21,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:21,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 303 transitions, 4915 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:21,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:21,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:21,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:22,034 INFO L124 PetriNetUnfolderBase]: 3433/5877 cut-off events. [2024-06-21 20:03:22,035 INFO L125 PetriNetUnfolderBase]: For 227784/227791 co-relation queries the response was YES. [2024-06-21 20:03:22,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39868 conditions, 5877 events. 3433/5877 cut-off events. For 227784/227791 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40675 event pairs, 1213 based on Foata normal form. 8/5882 useless extension candidates. Maximal degree in co-relation 39765. Up to 5246 conditions per place. [2024-06-21 20:03:22,107 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 209 selfloop transitions, 110 changer transitions 0/326 dead transitions. [2024-06-21 20:03:22,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 326 transitions, 5765 flow [2024-06-21 20:03:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:22,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 20:03:22,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:03:22,109 INFO L175 Difference]: Start difference. First operand has 205 places, 303 transitions, 4915 flow. Second operand 8 states and 188 transitions. [2024-06-21 20:03:22,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 326 transitions, 5765 flow [2024-06-21 20:03:22,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 326 transitions, 5595 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:22,755 INFO L231 Difference]: Finished difference. Result has 211 places, 303 transitions, 4981 flow [2024-06-21 20:03:22,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4745, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4981, PETRI_PLACES=211, PETRI_TRANSITIONS=303} [2024-06-21 20:03:22,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-21 20:03:22,756 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 303 transitions, 4981 flow [2024-06-21 20:03:22,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:22,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:22,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:22,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:03:22,757 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:22,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:22,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2090667566, now seen corresponding path program 3 times [2024-06-21 20:03:22,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:22,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110407731] [2024-06-21 20:03:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:22,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:22,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:22,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110407731] [2024-06-21 20:03:22,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110407731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:22,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:22,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:22,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47217139] [2024-06-21 20:03:22,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:22,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:22,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:22,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:22,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:22,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:22,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 303 transitions, 4981 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:22,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:22,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:22,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:23,845 INFO L124 PetriNetUnfolderBase]: 3435/5881 cut-off events. [2024-06-21 20:03:23,846 INFO L125 PetriNetUnfolderBase]: For 236734/236741 co-relation queries the response was YES. [2024-06-21 20:03:23,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40347 conditions, 5881 events. 3435/5881 cut-off events. For 236734/236741 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40673 event pairs, 1213 based on Foata normal form. 8/5886 useless extension candidates. Maximal degree in co-relation 40242. Up to 5250 conditions per place. [2024-06-21 20:03:23,918 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 210 selfloop transitions, 109 changer transitions 0/326 dead transitions. [2024-06-21 20:03:23,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 326 transitions, 5901 flow [2024-06-21 20:03:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:03:23,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 20:03:23,919 INFO L175 Difference]: Start difference. First operand has 211 places, 303 transitions, 4981 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:03:23,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 326 transitions, 5901 flow [2024-06-21 20:03:24,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 326 transitions, 5652 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:24,704 INFO L231 Difference]: Finished difference. Result has 212 places, 306 transitions, 5040 flow [2024-06-21 20:03:24,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4739, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5040, PETRI_PLACES=212, PETRI_TRANSITIONS=306} [2024-06-21 20:03:24,705 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-21 20:03:24,705 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 306 transitions, 5040 flow [2024-06-21 20:03:24,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:24,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:24,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:24,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:03:24,705 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:24,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:24,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1982112500, now seen corresponding path program 4 times [2024-06-21 20:03:24,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:24,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007990961] [2024-06-21 20:03:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:24,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:24,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007990961] [2024-06-21 20:03:24,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007990961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:24,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:24,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:24,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272479248] [2024-06-21 20:03:24,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:24,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:24,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:24,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:24,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:24,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:24,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 306 transitions, 5040 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:24,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:24,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:24,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:25,794 INFO L124 PetriNetUnfolderBase]: 3432/5876 cut-off events. [2024-06-21 20:03:25,795 INFO L125 PetriNetUnfolderBase]: For 236218/236228 co-relation queries the response was YES. [2024-06-21 20:03:25,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40274 conditions, 5876 events. 3432/5876 cut-off events. For 236218/236228 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40656 event pairs, 1226 based on Foata normal form. 9/5879 useless extension candidates. Maximal degree in co-relation 40169. Up to 5248 conditions per place. [2024-06-21 20:03:25,865 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 207 selfloop transitions, 108 changer transitions 0/322 dead transitions. [2024-06-21 20:03:25,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 322 transitions, 5868 flow [2024-06-21 20:03:25,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:03:25,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-21 20:03:25,866 INFO L175 Difference]: Start difference. First operand has 212 places, 306 transitions, 5040 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:03:25,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 322 transitions, 5868 flow [2024-06-21 20:03:26,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 322 transitions, 5517 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-21 20:03:26,472 INFO L231 Difference]: Finished difference. Result has 211 places, 306 transitions, 4915 flow [2024-06-21 20:03:26,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4915, PETRI_PLACES=211, PETRI_TRANSITIONS=306} [2024-06-21 20:03:26,473 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-21 20:03:26,473 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 306 transitions, 4915 flow [2024-06-21 20:03:26,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:26,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:26,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:26,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:03:26,473 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:26,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:26,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1982103572, now seen corresponding path program 1 times [2024-06-21 20:03:26,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:26,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657422707] [2024-06-21 20:03:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:26,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:26,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:26,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657422707] [2024-06-21 20:03:26,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657422707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:26,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:26,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:26,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124485533] [2024-06-21 20:03:26,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:26,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:26,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:26,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:26,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:26,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:26,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 306 transitions, 4915 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:26,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:26,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:26,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:27,494 INFO L124 PetriNetUnfolderBase]: 3342/5762 cut-off events. [2024-06-21 20:03:27,495 INFO L125 PetriNetUnfolderBase]: For 240523/240528 co-relation queries the response was YES. [2024-06-21 20:03:27,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39398 conditions, 5762 events. 3342/5762 cut-off events. For 240523/240528 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 40325 event pairs, 1199 based on Foata normal form. 14/5743 useless extension candidates. Maximal degree in co-relation 39293. Up to 5090 conditions per place. [2024-06-21 20:03:27,553 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 243 selfloop transitions, 25 changer transitions 0/321 dead transitions. [2024-06-21 20:03:27,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 321 transitions, 5519 flow [2024-06-21 20:03:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 20:03:27,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-21 20:03:27,554 INFO L175 Difference]: Start difference. First operand has 211 places, 306 transitions, 4915 flow. Second operand 6 states and 139 transitions. [2024-06-21 20:03:27,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 321 transitions, 5519 flow [2024-06-21 20:03:28,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 321 transitions, 5286 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:28,090 INFO L231 Difference]: Finished difference. Result has 212 places, 307 transitions, 4756 flow [2024-06-21 20:03:28,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4682, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4756, PETRI_PLACES=212, PETRI_TRANSITIONS=307} [2024-06-21 20:03:28,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-21 20:03:28,091 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 307 transitions, 4756 flow [2024-06-21 20:03:28,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:28,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:28,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:03:28,091 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:28,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:28,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1967818772, now seen corresponding path program 2 times [2024-06-21 20:03:28,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:28,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547418160] [2024-06-21 20:03:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:28,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:28,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:28,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547418160] [2024-06-21 20:03:28,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547418160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:28,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:28,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:28,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132069850] [2024-06-21 20:03:28,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:28,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:28,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:28,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:28,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:28,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:28,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 307 transitions, 4756 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:28,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:28,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:29,043 INFO L124 PetriNetUnfolderBase]: 3351/5778 cut-off events. [2024-06-21 20:03:29,044 INFO L125 PetriNetUnfolderBase]: For 245262/245267 co-relation queries the response was YES. [2024-06-21 20:03:29,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39375 conditions, 5778 events. 3351/5778 cut-off events. For 245262/245267 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 40507 event pairs, 1153 based on Foata normal form. 13/5763 useless extension candidates. Maximal degree in co-relation 39269. Up to 5019 conditions per place. [2024-06-21 20:03:29,106 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 244 selfloop transitions, 28 changer transitions 0/325 dead transitions. [2024-06-21 20:03:29,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 325 transitions, 5388 flow [2024-06-21 20:03:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 20:03:29,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:03:29,108 INFO L175 Difference]: Start difference. First operand has 212 places, 307 transitions, 4756 flow. Second operand 6 states and 141 transitions. [2024-06-21 20:03:29,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 325 transitions, 5388 flow [2024-06-21 20:03:29,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 325 transitions, 5330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:29,784 INFO L231 Difference]: Finished difference. Result has 214 places, 308 transitions, 4778 flow [2024-06-21 20:03:29,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4778, PETRI_PLACES=214, PETRI_TRANSITIONS=308} [2024-06-21 20:03:29,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-21 20:03:29,785 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 308 transitions, 4778 flow [2024-06-21 20:03:29,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:29,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:29,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:03:29,786 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:29,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1851881108, now seen corresponding path program 1 times [2024-06-21 20:03:29,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:29,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348572570] [2024-06-21 20:03:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:29,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:29,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348572570] [2024-06-21 20:03:29,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348572570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:29,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:29,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:29,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550037079] [2024-06-21 20:03:29,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:29,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:29,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:29,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:29,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:29,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:29,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 308 transitions, 4778 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:29,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:29,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:30,810 INFO L124 PetriNetUnfolderBase]: 3478/5955 cut-off events. [2024-06-21 20:03:30,810 INFO L125 PetriNetUnfolderBase]: For 252291/252291 co-relation queries the response was YES. [2024-06-21 20:03:30,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40744 conditions, 5955 events. 3478/5955 cut-off events. For 252291/252291 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 41240 event pairs, 1177 based on Foata normal form. 2/5955 useless extension candidates. Maximal degree in co-relation 40637. Up to 5369 conditions per place. [2024-06-21 20:03:30,872 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 285 selfloop transitions, 51 changer transitions 0/343 dead transitions. [2024-06-21 20:03:30,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 343 transitions, 5808 flow [2024-06-21 20:03:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:03:30,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:03:30,874 INFO L175 Difference]: Start difference. First operand has 214 places, 308 transitions, 4778 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:03:30,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 343 transitions, 5808 flow [2024-06-21 20:03:31,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 343 transitions, 5740 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:31,480 INFO L231 Difference]: Finished difference. Result has 218 places, 314 transitions, 4977 flow [2024-06-21 20:03:31,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4712, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4977, PETRI_PLACES=218, PETRI_TRANSITIONS=314} [2024-06-21 20:03:31,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-21 20:03:31,481 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 314 transitions, 4977 flow [2024-06-21 20:03:31,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:31,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:31,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:03:31,482 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:31,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:31,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1851941558, now seen corresponding path program 2 times [2024-06-21 20:03:31,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:31,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828797555] [2024-06-21 20:03:31,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:31,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:31,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:31,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828797555] [2024-06-21 20:03:31,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828797555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:31,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:31,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:31,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824486288] [2024-06-21 20:03:31,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:31,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:31,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:31,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:31,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:31,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 314 transitions, 4977 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:31,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:31,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:32,501 INFO L124 PetriNetUnfolderBase]: 3473/5946 cut-off events. [2024-06-21 20:03:32,502 INFO L125 PetriNetUnfolderBase]: For 261458/261458 co-relation queries the response was YES. [2024-06-21 20:03:32,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40952 conditions, 5946 events. 3473/5946 cut-off events. For 261458/261458 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 41194 event pairs, 1211 based on Foata normal form. 2/5946 useless extension candidates. Maximal degree in co-relation 40843. Up to 5467 conditions per place. [2024-06-21 20:03:32,575 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 284 selfloop transitions, 44 changer transitions 0/335 dead transitions. [2024-06-21 20:03:32,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 335 transitions, 5729 flow [2024-06-21 20:03:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:32,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 20:03:32,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 20:03:32,577 INFO L175 Difference]: Start difference. First operand has 218 places, 314 transitions, 4977 flow. Second operand 7 states and 160 transitions. [2024-06-21 20:03:32,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 335 transitions, 5729 flow [2024-06-21 20:03:33,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 335 transitions, 5584 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:33,319 INFO L231 Difference]: Finished difference. Result has 222 places, 314 transitions, 4925 flow [2024-06-21 20:03:33,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4832, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4925, PETRI_PLACES=222, PETRI_TRANSITIONS=314} [2024-06-21 20:03:33,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-21 20:03:33,320 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 314 transitions, 4925 flow [2024-06-21 20:03:33,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:33,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:33,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:33,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:03:33,321 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:33,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:33,321 INFO L85 PathProgramCache]: Analyzing trace with hash 941763648, now seen corresponding path program 1 times [2024-06-21 20:03:33,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:33,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560205955] [2024-06-21 20:03:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:33,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:33,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:33,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560205955] [2024-06-21 20:03:33,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560205955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:33,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:33,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:33,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276984964] [2024-06-21 20:03:33,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:33,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:33,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:33,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:33,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:33,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:33,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 314 transitions, 4925 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:33,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:33,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:33,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:34,387 INFO L124 PetriNetUnfolderBase]: 3532/6041 cut-off events. [2024-06-21 20:03:34,387 INFO L125 PetriNetUnfolderBase]: For 288268/288275 co-relation queries the response was YES. [2024-06-21 20:03:34,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41596 conditions, 6041 events. 3532/6041 cut-off events. For 288268/288275 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42032 event pairs, 1225 based on Foata normal form. 26/6064 useless extension candidates. Maximal degree in co-relation 41485. Up to 5465 conditions per place. [2024-06-21 20:03:34,460 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 286 selfloop transitions, 43 changer transitions 0/336 dead transitions. [2024-06-21 20:03:34,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 5709 flow [2024-06-21 20:03:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:34,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 20:03:34,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-21 20:03:34,462 INFO L175 Difference]: Start difference. First operand has 222 places, 314 transitions, 4925 flow. Second operand 8 states and 181 transitions. [2024-06-21 20:03:34,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 5709 flow [2024-06-21 20:03:35,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 336 transitions, 5608 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:35,319 INFO L231 Difference]: Finished difference. Result has 225 places, 317 transitions, 4985 flow [2024-06-21 20:03:35,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4824, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4985, PETRI_PLACES=225, PETRI_TRANSITIONS=317} [2024-06-21 20:03:35,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-21 20:03:35,320 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 317 transitions, 4985 flow [2024-06-21 20:03:35,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:35,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:35,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:35,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:03:35,321 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:35,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2090682446, now seen corresponding path program 2 times [2024-06-21 20:03:35,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:35,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180060316] [2024-06-21 20:03:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:35,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:35,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:35,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180060316] [2024-06-21 20:03:35,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180060316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:35,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:35,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:35,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197612673] [2024-06-21 20:03:35,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:35,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:35,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:35,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:35,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:35,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 317 transitions, 4985 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:35,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:35,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:35,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:36,388 INFO L124 PetriNetUnfolderBase]: 3614/6179 cut-off events. [2024-06-21 20:03:36,388 INFO L125 PetriNetUnfolderBase]: For 307745/307752 co-relation queries the response was YES. [2024-06-21 20:03:36,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42607 conditions, 6179 events. 3614/6179 cut-off events. For 307745/307752 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 43052 event pairs, 1239 based on Foata normal form. 36/6212 useless extension candidates. Maximal degree in co-relation 42495. Up to 5410 conditions per place. [2024-06-21 20:03:36,460 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 253 selfloop transitions, 84 changer transitions 0/344 dead transitions. [2024-06-21 20:03:36,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 344 transitions, 5821 flow [2024-06-21 20:03:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:03:36,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 20:03:36,461 INFO L175 Difference]: Start difference. First operand has 225 places, 317 transitions, 4985 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:03:36,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 344 transitions, 5821 flow [2024-06-21 20:03:37,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 344 transitions, 5696 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:37,393 INFO L231 Difference]: Finished difference. Result has 227 places, 322 transitions, 5146 flow [2024-06-21 20:03:37,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4860, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5146, PETRI_PLACES=227, PETRI_TRANSITIONS=322} [2024-06-21 20:03:37,394 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-21 20:03:37,394 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 322 transitions, 5146 flow [2024-06-21 20:03:37,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:37,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:37,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:37,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:03:37,395 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:37,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:37,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1968109490, now seen corresponding path program 3 times [2024-06-21 20:03:37,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:37,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027974320] [2024-06-21 20:03:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:37,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:37,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:37,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027974320] [2024-06-21 20:03:37,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027974320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:37,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:37,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:37,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610204942] [2024-06-21 20:03:37,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:37,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:37,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:37,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:37,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:37,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:37,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 322 transitions, 5146 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:37,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:37,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:37,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:38,441 INFO L124 PetriNetUnfolderBase]: 3590/6134 cut-off events. [2024-06-21 20:03:38,441 INFO L125 PetriNetUnfolderBase]: For 290188/290198 co-relation queries the response was YES. [2024-06-21 20:03:38,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42571 conditions, 6134 events. 3590/6134 cut-off events. For 290188/290198 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42654 event pairs, 1244 based on Foata normal form. 12/6140 useless extension candidates. Maximal degree in co-relation 42458. Up to 5548 conditions per place. [2024-06-21 20:03:38,512 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 257 selfloop transitions, 76 changer transitions 0/340 dead transitions. [2024-06-21 20:03:38,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 340 transitions, 5898 flow [2024-06-21 20:03:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 20:03:38,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:03:38,514 INFO L175 Difference]: Start difference. First operand has 227 places, 322 transitions, 5146 flow. Second operand 7 states and 161 transitions. [2024-06-21 20:03:38,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 340 transitions, 5898 flow [2024-06-21 20:03:39,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 340 transitions, 5711 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:39,315 INFO L231 Difference]: Finished difference. Result has 229 places, 325 transitions, 5174 flow [2024-06-21 20:03:39,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4959, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5174, PETRI_PLACES=229, PETRI_TRANSITIONS=325} [2024-06-21 20:03:39,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-21 20:03:39,316 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 325 transitions, 5174 flow [2024-06-21 20:03:39,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:39,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:39,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:39,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:03:39,317 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:39,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1967812820, now seen corresponding path program 4 times [2024-06-21 20:03:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:39,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760894147] [2024-06-21 20:03:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:39,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:39,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:39,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760894147] [2024-06-21 20:03:39,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760894147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:39,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:39,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:39,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6088300] [2024-06-21 20:03:39,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:39,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:39,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:39,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:39,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:39,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:39,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 325 transitions, 5174 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:39,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:39,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:39,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:40,345 INFO L124 PetriNetUnfolderBase]: 3566/6094 cut-off events. [2024-06-21 20:03:40,346 INFO L125 PetriNetUnfolderBase]: For 295299/295309 co-relation queries the response was YES. [2024-06-21 20:03:40,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42191 conditions, 6094 events. 3566/6094 cut-off events. For 295299/295309 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42350 event pairs, 1198 based on Foata normal form. 12/6100 useless extension candidates. Maximal degree in co-relation 42077. Up to 5290 conditions per place. [2024-06-21 20:03:40,415 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 88 changer transitions 0/346 dead transitions. [2024-06-21 20:03:40,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 346 transitions, 5942 flow [2024-06-21 20:03:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:03:40,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 20:03:40,416 INFO L175 Difference]: Start difference. First operand has 229 places, 325 transitions, 5174 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:03:40,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 346 transitions, 5942 flow [2024-06-21 20:03:41,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 346 transitions, 5774 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:41,224 INFO L231 Difference]: Finished difference. Result has 233 places, 327 transitions, 5244 flow [2024-06-21 20:03:41,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5244, PETRI_PLACES=233, PETRI_TRANSITIONS=327} [2024-06-21 20:03:41,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-21 20:03:41,225 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 327 transitions, 5244 flow [2024-06-21 20:03:41,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:41,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:41,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:41,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:03:41,226 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:41,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash -871962364, now seen corresponding path program 1 times [2024-06-21 20:03:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:41,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660452641] [2024-06-21 20:03:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:41,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:41,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:41,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660452641] [2024-06-21 20:03:41,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660452641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:41,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:41,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:41,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785374415] [2024-06-21 20:03:41,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:41,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:41,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:41,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:41,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 327 transitions, 5244 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:41,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:41,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:41,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:42,306 INFO L124 PetriNetUnfolderBase]: 3610/6161 cut-off events. [2024-06-21 20:03:42,307 INFO L125 PetriNetUnfolderBase]: For 307292/307296 co-relation queries the response was YES. [2024-06-21 20:03:42,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43458 conditions, 6161 events. 3610/6161 cut-off events. For 307292/307296 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42791 event pairs, 1173 based on Foata normal form. 2/6158 useless extension candidates. Maximal degree in co-relation 43342. Up to 5512 conditions per place. [2024-06-21 20:03:42,378 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 113 changer transitions 0/368 dead transitions. [2024-06-21 20:03:42,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 368 transitions, 6644 flow [2024-06-21 20:03:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:42,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:03:42,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 20:03:42,379 INFO L175 Difference]: Start difference. First operand has 233 places, 327 transitions, 5244 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:03:42,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 368 transitions, 6644 flow [2024-06-21 20:03:43,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 368 transitions, 6450 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:43,237 INFO L231 Difference]: Finished difference. Result has 238 places, 347 transitions, 5845 flow [2024-06-21 20:03:43,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5845, PETRI_PLACES=238, PETRI_TRANSITIONS=347} [2024-06-21 20:03:43,237 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-21 20:03:43,237 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 347 transitions, 5845 flow [2024-06-21 20:03:43,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:43,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:43,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:43,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:03:43,238 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:43,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:43,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2135512350, now seen corresponding path program 2 times [2024-06-21 20:03:43,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:43,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573483072] [2024-06-21 20:03:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:43,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:43,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:43,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573483072] [2024-06-21 20:03:43,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573483072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:43,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:43,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:43,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508224027] [2024-06-21 20:03:43,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:43,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:43,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:43,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:43,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:43,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:43,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 347 transitions, 5845 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:43,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:43,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:43,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:44,392 INFO L124 PetriNetUnfolderBase]: 3606/6160 cut-off events. [2024-06-21 20:03:44,392 INFO L125 PetriNetUnfolderBase]: For 321770/321774 co-relation queries the response was YES. [2024-06-21 20:03:44,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44895 conditions, 6160 events. 3606/6160 cut-off events. For 321770/321774 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42837 event pairs, 1200 based on Foata normal form. 3/6158 useless extension candidates. Maximal degree in co-relation 44776. Up to 5588 conditions per place. [2024-06-21 20:03:44,462 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 68 changer transitions 0/363 dead transitions. [2024-06-21 20:03:44,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 363 transitions, 6701 flow [2024-06-21 20:03:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:03:44,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 20:03:44,469 INFO L175 Difference]: Start difference. First operand has 238 places, 347 transitions, 5845 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:03:44,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 363 transitions, 6701 flow [2024-06-21 20:03:45,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 363 transitions, 6513 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:45,359 INFO L231 Difference]: Finished difference. Result has 241 places, 348 transitions, 5825 flow [2024-06-21 20:03:45,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5657, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5825, PETRI_PLACES=241, PETRI_TRANSITIONS=348} [2024-06-21 20:03:45,360 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-21 20:03:45,360 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 348 transitions, 5825 flow [2024-06-21 20:03:45,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:45,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:45,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:45,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:03:45,361 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:45,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2135512536, now seen corresponding path program 1 times [2024-06-21 20:03:45,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:45,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669101879] [2024-06-21 20:03:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:45,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:45,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669101879] [2024-06-21 20:03:45,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669101879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:45,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:45,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:45,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459865702] [2024-06-21 20:03:45,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:45,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:45,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:45,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:45,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:45,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:45,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 348 transitions, 5825 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:45,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:45,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:45,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:46,521 INFO L124 PetriNetUnfolderBase]: 3598/6148 cut-off events. [2024-06-21 20:03:46,521 INFO L125 PetriNetUnfolderBase]: For 330449/330453 co-relation queries the response was YES. [2024-06-21 20:03:46,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44989 conditions, 6148 events. 3598/6148 cut-off events. For 330449/330453 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42761 event pairs, 1224 based on Foata normal form. 3/6146 useless extension candidates. Maximal degree in co-relation 44869. Up to 5580 conditions per place. [2024-06-21 20:03:46,594 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 287 selfloop transitions, 68 changer transitions 0/362 dead transitions. [2024-06-21 20:03:46,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 362 transitions, 6569 flow [2024-06-21 20:03:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:03:46,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 20:03:46,596 INFO L175 Difference]: Start difference. First operand has 241 places, 348 transitions, 5825 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:03:46,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 362 transitions, 6569 flow [2024-06-21 20:03:47,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 362 transitions, 6402 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:47,543 INFO L231 Difference]: Finished difference. Result has 244 places, 348 transitions, 5816 flow [2024-06-21 20:03:47,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5658, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5816, PETRI_PLACES=244, PETRI_TRANSITIONS=348} [2024-06-21 20:03:47,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-21 20:03:47,544 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 348 transitions, 5816 flow [2024-06-21 20:03:47,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:47,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:47,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:47,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:03:47,545 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)] === [2024-06-21 20:03:47,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:47,545 INFO L85 PathProgramCache]: Analyzing trace with hash 370276726, now seen corresponding path program 2 times [2024-06-21 20:03:47,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:47,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646224846] [2024-06-21 20:03:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:47,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:47,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:47,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646224846] [2024-06-21 20:03:47,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646224846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:47,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:47,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:47,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706817754] [2024-06-21 20:03:47,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:47,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:47,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:47,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:47,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:47,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:47,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 348 transitions, 5816 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:47,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:47,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:47,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:48,654 INFO L124 PetriNetUnfolderBase]: 3620/6180 cut-off events. [2024-06-21 20:03:48,654 INFO L125 PetriNetUnfolderBase]: For 342777/342781 co-relation queries the response was YES. [2024-06-21 20:03:48,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45406 conditions, 6180 events. 3620/6180 cut-off events. For 342777/342781 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42958 event pairs, 1213 based on Foata normal form. 3/6178 useless extension candidates. Maximal degree in co-relation 45286. Up to 5509 conditions per place. [2024-06-21 20:03:48,726 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 118 changer transitions 1/378 dead transitions. [2024-06-21 20:03:48,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 378 transitions, 6927 flow [2024-06-21 20:03:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:03:48,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:03:48,727 INFO L175 Difference]: Start difference. First operand has 244 places, 348 transitions, 5816 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:03:48,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 378 transitions, 6927 flow [2024-06-21 20:03:49,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 378 transitions, 6791 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:49,738 INFO L231 Difference]: Finished difference. Result has 247 places, 358 transitions, 6235 flow [2024-06-21 20:03:49,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5680, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6235, PETRI_PLACES=247, PETRI_TRANSITIONS=358} [2024-06-21 20:03:49,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-21 20:03:49,738 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 358 transitions, 6235 flow [2024-06-21 20:03:49,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:49,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:49,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:49,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:03:49,739 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)] === [2024-06-21 20:03:49,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:49,739 INFO L85 PathProgramCache]: Analyzing trace with hash 370513876, now seen corresponding path program 3 times [2024-06-21 20:03:49,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:49,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980231693] [2024-06-21 20:03:49,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:49,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:49,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:49,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980231693] [2024-06-21 20:03:49,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980231693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:49,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:49,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:49,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949458039] [2024-06-21 20:03:49,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:49,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:49,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:49,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:49,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:49,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:49,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 358 transitions, 6235 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:49,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:49,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:49,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:50,898 INFO L124 PetriNetUnfolderBase]: 3613/6170 cut-off events. [2024-06-21 20:03:50,898 INFO L125 PetriNetUnfolderBase]: For 352700/352704 co-relation queries the response was YES. [2024-06-21 20:03:50,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45904 conditions, 6170 events. 3613/6170 cut-off events. For 352700/352704 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42820 event pairs, 1219 based on Foata normal form. 2/6167 useless extension candidates. Maximal degree in co-relation 45781. Up to 5504 conditions per place. [2024-06-21 20:03:50,971 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 249 selfloop transitions, 118 changer transitions 2/376 dead transitions. [2024-06-21 20:03:50,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 376 transitions, 7036 flow [2024-06-21 20:03:50,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:50,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:03:50,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:03:50,972 INFO L175 Difference]: Start difference. First operand has 247 places, 358 transitions, 6235 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:03:50,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 376 transitions, 7036 flow [2024-06-21 20:03:52,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 376 transitions, 6930 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:52,036 INFO L231 Difference]: Finished difference. Result has 250 places, 357 transitions, 6358 flow [2024-06-21 20:03:52,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6358, PETRI_PLACES=250, PETRI_TRANSITIONS=357} [2024-06-21 20:03:52,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-21 20:03:52,037 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 357 transitions, 6358 flow [2024-06-21 20:03:52,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:52,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:52,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:52,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:03:52,037 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)] === [2024-06-21 20:03:52,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash -335767544, now seen corresponding path program 1 times [2024-06-21 20:03:52,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:52,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502263538] [2024-06-21 20:03:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:52,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:52,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:52,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502263538] [2024-06-21 20:03:52,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502263538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:52,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:52,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:52,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070352188] [2024-06-21 20:03:52,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:52,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:52,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:52,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:52,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:52,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 357 transitions, 6358 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:52,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:52,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:52,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:53,109 INFO L124 PetriNetUnfolderBase]: 3593/6140 cut-off events. [2024-06-21 20:03:53,109 INFO L125 PetriNetUnfolderBase]: For 340431/340435 co-relation queries the response was YES. [2024-06-21 20:03:53,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45378 conditions, 6140 events. 3593/6140 cut-off events. For 340431/340435 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42569 event pairs, 1057 based on Foata normal form. 7/6142 useless extension candidates. Maximal degree in co-relation 45255. Up to 5610 conditions per place. [2024-06-21 20:03:53,188 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 352 selfloop transitions, 17 changer transitions 0/376 dead transitions. [2024-06-21 20:03:53,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 376 transitions, 7153 flow [2024-06-21 20:03:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-21 20:03:53,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-21 20:03:53,189 INFO L175 Difference]: Start difference. First operand has 250 places, 357 transitions, 6358 flow. Second operand 6 states and 137 transitions. [2024-06-21 20:03:53,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 376 transitions, 7153 flow [2024-06-21 20:03:54,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 376 transitions, 6906 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:54,370 INFO L231 Difference]: Finished difference. Result has 250 places, 358 transitions, 6154 flow [2024-06-21 20:03:54,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6154, PETRI_PLACES=250, PETRI_TRANSITIONS=358} [2024-06-21 20:03:54,370 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-21 20:03:54,371 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 358 transitions, 6154 flow [2024-06-21 20:03:54,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:54,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:54,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:54,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:03:54,371 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)] === [2024-06-21 20:03:54,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:54,372 INFO L85 PathProgramCache]: Analyzing trace with hash 370184470, now seen corresponding path program 2 times [2024-06-21 20:03:54,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:54,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421680393] [2024-06-21 20:03:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:54,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:54,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:54,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421680393] [2024-06-21 20:03:54,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421680393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:54,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:54,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:54,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912886692] [2024-06-21 20:03:54,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:54,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:54,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:54,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:54,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:54,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:54,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 358 transitions, 6154 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:54,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:54,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:54,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:55,490 INFO L124 PetriNetUnfolderBase]: 3580/6121 cut-off events. [2024-06-21 20:03:55,490 INFO L125 PetriNetUnfolderBase]: For 331589/331593 co-relation queries the response was YES. [2024-06-21 20:03:55,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44725 conditions, 6121 events. 3580/6121 cut-off events. For 331589/331593 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42428 event pairs, 1013 based on Foata normal form. 7/6123 useless extension candidates. Maximal degree in co-relation 44602. Up to 5515 conditions per place. [2024-06-21 20:03:55,567 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 341 selfloop transitions, 30 changer transitions 0/378 dead transitions. [2024-06-21 20:03:55,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 378 transitions, 6976 flow [2024-06-21 20:03:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 20:03:55,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:03:55,568 INFO L175 Difference]: Start difference. First operand has 250 places, 358 transitions, 6154 flow. Second operand 6 states and 144 transitions. [2024-06-21 20:03:55,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 378 transitions, 6976 flow [2024-06-21 20:03:56,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 378 transitions, 6899 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:56,527 INFO L231 Difference]: Finished difference. Result has 252 places, 358 transitions, 6141 flow [2024-06-21 20:03:56,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6141, PETRI_PLACES=252, PETRI_TRANSITIONS=358} [2024-06-21 20:03:56,528 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-21 20:03:56,528 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 358 transitions, 6141 flow [2024-06-21 20:03:56,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:56,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:56,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:56,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:03:56,528 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)] === [2024-06-21 20:03:56,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:56,529 INFO L85 PathProgramCache]: Analyzing trace with hash -733434214, now seen corresponding path program 3 times [2024-06-21 20:03:56,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:56,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436323648] [2024-06-21 20:03:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:56,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:56,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:56,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436323648] [2024-06-21 20:03:56,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436323648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:56,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:56,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:56,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982887766] [2024-06-21 20:03:56,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:56,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:56,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:56,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:56,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:56,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:56,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 358 transitions, 6141 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:56,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:56,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:56,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:57,608 INFO L124 PetriNetUnfolderBase]: 3601/6152 cut-off events. [2024-06-21 20:03:57,608 INFO L125 PetriNetUnfolderBase]: For 339050/339054 co-relation queries the response was YES. [2024-06-21 20:03:57,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45265 conditions, 6152 events. 3601/6152 cut-off events. For 339050/339054 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42716 event pairs, 1185 based on Foata normal form. 2/6149 useless extension candidates. Maximal degree in co-relation 45142. Up to 5335 conditions per place. [2024-06-21 20:03:57,680 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 155 changer transitions 0/396 dead transitions. [2024-06-21 20:03:57,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 396 transitions, 7371 flow [2024-06-21 20:03:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:03:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:03:57,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-21 20:03:57,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-21 20:03:57,681 INFO L175 Difference]: Start difference. First operand has 252 places, 358 transitions, 6141 flow. Second operand 10 states and 237 transitions. [2024-06-21 20:03:57,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 396 transitions, 7371 flow [2024-06-21 20:03:58,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 396 transitions, 7305 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:58,611 INFO L231 Difference]: Finished difference. Result has 259 places, 364 transitions, 6552 flow [2024-06-21 20:03:58,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6075, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6552, PETRI_PLACES=259, PETRI_TRANSITIONS=364} [2024-06-21 20:03:58,612 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-21 20:03:58,612 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 364 transitions, 6552 flow [2024-06-21 20:03:58,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:58,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:58,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:58,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:03:58,613 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)] === [2024-06-21 20:03:58,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:58,613 INFO L85 PathProgramCache]: Analyzing trace with hash -733314058, now seen corresponding path program 4 times [2024-06-21 20:03:58,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:58,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107191863] [2024-06-21 20:03:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:58,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:58,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:58,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107191863] [2024-06-21 20:03:58,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107191863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:58,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:58,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:58,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423144546] [2024-06-21 20:03:58,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:58,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:58,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:58,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:58,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:58,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 364 transitions, 6552 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:03:58,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:58,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:58,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:59,716 INFO L124 PetriNetUnfolderBase]: 3626/6205 cut-off events. [2024-06-21 20:03:59,717 INFO L125 PetriNetUnfolderBase]: For 358803/358807 co-relation queries the response was YES. [2024-06-21 20:03:59,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47208 conditions, 6205 events. 3626/6205 cut-off events. For 358803/358807 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43185 event pairs, 1205 based on Foata normal form. 3/6203 useless extension candidates. Maximal degree in co-relation 47083. Up to 5623 conditions per place. [2024-06-21 20:03:59,794 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 333 selfloop transitions, 51 changer transitions 2/393 dead transitions. [2024-06-21 20:03:59,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 393 transitions, 7512 flow [2024-06-21 20:03:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 20:03:59,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 20:03:59,795 INFO L175 Difference]: Start difference. First operand has 259 places, 364 transitions, 6552 flow. Second operand 8 states and 180 transitions. [2024-06-21 20:03:59,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 393 transitions, 7512 flow [2024-06-21 20:04:00,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 393 transitions, 7253 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:00,968 INFO L231 Difference]: Finished difference. Result has 262 places, 373 transitions, 6542 flow [2024-06-21 20:04:00,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6542, PETRI_PLACES=262, PETRI_TRANSITIONS=373} [2024-06-21 20:04:00,969 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-21 20:04:00,969 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 373 transitions, 6542 flow [2024-06-21 20:04:00,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:00,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:00,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:00,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:04:00,970 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)] === [2024-06-21 20:04:00,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:00,970 INFO L85 PathProgramCache]: Analyzing trace with hash -728071834, now seen corresponding path program 4 times [2024-06-21 20:04:00,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:00,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815024488] [2024-06-21 20:04:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:00,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:01,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:01,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815024488] [2024-06-21 20:04:01,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815024488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:01,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:01,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:01,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218166313] [2024-06-21 20:04:01,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:01,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:01,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:01,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:01,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 373 transitions, 6542 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:01,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:01,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:01,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:02,127 INFO L124 PetriNetUnfolderBase]: 3624/6195 cut-off events. [2024-06-21 20:04:02,127 INFO L125 PetriNetUnfolderBase]: For 364027/364031 co-relation queries the response was YES. [2024-06-21 20:04:02,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46489 conditions, 6195 events. 3624/6195 cut-off events. For 364027/364031 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43034 event pairs, 1197 based on Foata normal form. 2/6192 useless extension candidates. Maximal degree in co-relation 46362. Up to 5355 conditions per place. [2024-06-21 20:04:02,201 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 221 selfloop transitions, 175 changer transitions 0/403 dead transitions. [2024-06-21 20:04:02,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 403 transitions, 7764 flow [2024-06-21 20:04:02,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:02,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:02,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 20:04:02,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:04:02,202 INFO L175 Difference]: Start difference. First operand has 262 places, 373 transitions, 6542 flow. Second operand 9 states and 210 transitions. [2024-06-21 20:04:02,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 403 transitions, 7764 flow [2024-06-21 20:04:03,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 403 transitions, 7642 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:03,281 INFO L231 Difference]: Finished difference. Result has 266 places, 379 transitions, 6934 flow [2024-06-21 20:04:03,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6420, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6934, PETRI_PLACES=266, PETRI_TRANSITIONS=379} [2024-06-21 20:04:03,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-21 20:04:03,282 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 379 transitions, 6934 flow [2024-06-21 20:04:03,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:03,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:03,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:03,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:04:03,282 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)] === [2024-06-21 20:04:03,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:03,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2075209590, now seen corresponding path program 1 times [2024-06-21 20:04:03,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:03,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857063722] [2024-06-21 20:04:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:03,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:03,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:03,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857063722] [2024-06-21 20:04:03,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857063722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:03,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:03,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:03,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075306004] [2024-06-21 20:04:03,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:03,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:03,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:03,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:03,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:03,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 379 transitions, 6934 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:03,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:03,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:03,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:04,422 INFO L124 PetriNetUnfolderBase]: 3618/6194 cut-off events. [2024-06-21 20:04:04,422 INFO L125 PetriNetUnfolderBase]: For 375849/375856 co-relation queries the response was YES. [2024-06-21 20:04:04,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46880 conditions, 6194 events. 3618/6194 cut-off events. For 375849/375856 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43090 event pairs, 1194 based on Foata normal form. 8/6199 useless extension candidates. Maximal degree in co-relation 46752. Up to 5567 conditions per place. [2024-06-21 20:04:04,497 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 288 selfloop transitions, 103 changer transitions 0/398 dead transitions. [2024-06-21 20:04:04,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 398 transitions, 7762 flow [2024-06-21 20:04:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 20:04:04,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-21 20:04:04,498 INFO L175 Difference]: Start difference. First operand has 266 places, 379 transitions, 6934 flow. Second operand 9 states and 201 transitions. [2024-06-21 20:04:04,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 398 transitions, 7762 flow [2024-06-21 20:04:05,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 398 transitions, 7516 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:05,689 INFO L231 Difference]: Finished difference. Result has 271 places, 379 transitions, 6908 flow [2024-06-21 20:04:05,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6688, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6908, PETRI_PLACES=271, PETRI_TRANSITIONS=379} [2024-06-21 20:04:05,690 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-21 20:04:05,690 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 379 transitions, 6908 flow [2024-06-21 20:04:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:05,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:05,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:05,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:04:05,690 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)] === [2024-06-21 20:04:05,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash -727773304, now seen corresponding path program 5 times [2024-06-21 20:04:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:05,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123222913] [2024-06-21 20:04:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:05,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:05,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:05,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123222913] [2024-06-21 20:04:05,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123222913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:05,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:05,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:05,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348456637] [2024-06-21 20:04:05,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:05,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:05,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:05,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:05,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:05,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:05,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 379 transitions, 6908 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:05,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:05,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:05,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:06,801 INFO L124 PetriNetUnfolderBase]: 3615/6183 cut-off events. [2024-06-21 20:04:06,801 INFO L125 PetriNetUnfolderBase]: For 384996/385000 co-relation queries the response was YES. [2024-06-21 20:04:06,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47104 conditions, 6183 events. 3615/6183 cut-off events. For 384996/385000 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43031 event pairs, 1198 based on Foata normal form. 2/6180 useless extension candidates. Maximal degree in co-relation 46974. Up to 5349 conditions per place. [2024-06-21 20:04:06,879 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 218 selfloop transitions, 174 changer transitions 0/399 dead transitions. [2024-06-21 20:04:06,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 399 transitions, 7852 flow [2024-06-21 20:04:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-21 20:04:06,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:04:06,881 INFO L175 Difference]: Start difference. First operand has 271 places, 379 transitions, 6908 flow. Second operand 9 states and 207 transitions. [2024-06-21 20:04:06,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 399 transitions, 7852 flow [2024-06-21 20:04:07,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 399 transitions, 7525 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-21 20:04:07,999 INFO L231 Difference]: Finished difference. Result has 271 places, 379 transitions, 6938 flow [2024-06-21 20:04:07,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6583, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6938, PETRI_PLACES=271, PETRI_TRANSITIONS=379} [2024-06-21 20:04:08,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-21 20:04:08,000 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 379 transitions, 6938 flow [2024-06-21 20:04:08,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:08,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:08,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:08,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:04:08,001 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)] === [2024-06-21 20:04:08,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:08,001 INFO L85 PathProgramCache]: Analyzing trace with hash -413777988, now seen corresponding path program 5 times [2024-06-21 20:04:08,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:08,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638945782] [2024-06-21 20:04:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:08,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:08,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:08,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638945782] [2024-06-21 20:04:08,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638945782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:08,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:08,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:08,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637602102] [2024-06-21 20:04:08,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:08,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:08,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:08,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:08,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:08,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:08,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 379 transitions, 6938 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:08,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:08,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:08,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:09,163 INFO L124 PetriNetUnfolderBase]: 3663/6271 cut-off events. [2024-06-21 20:04:09,164 INFO L125 PetriNetUnfolderBase]: For 390369/390373 co-relation queries the response was YES. [2024-06-21 20:04:09,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47990 conditions, 6271 events. 3663/6271 cut-off events. For 390369/390373 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43754 event pairs, 1202 based on Foata normal form. 3/6269 useless extension candidates. Maximal degree in co-relation 47860. Up to 5602 conditions per place. [2024-06-21 20:04:09,243 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 313 selfloop transitions, 92 changer transitions 1/413 dead transitions. [2024-06-21 20:04:09,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 413 transitions, 8218 flow [2024-06-21 20:04:09,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-21 20:04:09,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:04:09,244 INFO L175 Difference]: Start difference. First operand has 271 places, 379 transitions, 6938 flow. Second operand 8 states and 184 transitions. [2024-06-21 20:04:09,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 413 transitions, 8218 flow [2024-06-21 20:04:10,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 413 transitions, 7811 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 20:04:10,440 INFO L231 Difference]: Finished difference. Result has 273 places, 396 transitions, 7111 flow [2024-06-21 20:04:10,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6570, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7111, PETRI_PLACES=273, PETRI_TRANSITIONS=396} [2024-06-21 20:04:10,441 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-21 20:04:10,441 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 396 transitions, 7111 flow [2024-06-21 20:04:10,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:10,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:10,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:10,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:04:10,442 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)] === [2024-06-21 20:04:10,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:10,442 INFO L85 PathProgramCache]: Analyzing trace with hash -413789148, now seen corresponding path program 6 times [2024-06-21 20:04:10,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:10,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688073356] [2024-06-21 20:04:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:10,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:10,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:10,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688073356] [2024-06-21 20:04:10,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688073356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:10,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:10,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:10,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360200530] [2024-06-21 20:04:10,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:10,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:10,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:10,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:10,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 396 transitions, 7111 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:10,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:10,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:10,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:11,608 INFO L124 PetriNetUnfolderBase]: 3653/6253 cut-off events. [2024-06-21 20:04:11,609 INFO L125 PetriNetUnfolderBase]: For 398402/398406 co-relation queries the response was YES. [2024-06-21 20:04:11,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47841 conditions, 6253 events. 3653/6253 cut-off events. For 398402/398406 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43609 event pairs, 1200 based on Foata normal form. 3/6251 useless extension candidates. Maximal degree in co-relation 47708. Up to 5594 conditions per place. [2024-06-21 20:04:11,683 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 316 selfloop transitions, 87 changer transitions 2/412 dead transitions. [2024-06-21 20:04:11,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 412 transitions, 7959 flow [2024-06-21 20:04:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 20:04:11,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 20:04:11,685 INFO L175 Difference]: Start difference. First operand has 273 places, 396 transitions, 7111 flow. Second operand 9 states and 200 transitions. [2024-06-21 20:04:11,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 412 transitions, 7959 flow [2024-06-21 20:04:12,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 412 transitions, 7898 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-21 20:04:12,928 INFO L231 Difference]: Finished difference. Result has 281 places, 394 transitions, 7199 flow [2024-06-21 20:04:12,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7050, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7199, PETRI_PLACES=281, PETRI_TRANSITIONS=394} [2024-06-21 20:04:12,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-21 20:04:12,928 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 394 transitions, 7199 flow [2024-06-21 20:04:12,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:12,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:12,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:12,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:04:12,929 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)] === [2024-06-21 20:04:12,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:12,929 INFO L85 PathProgramCache]: Analyzing trace with hash 705838400, now seen corresponding path program 7 times [2024-06-21 20:04:12,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:12,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034204849] [2024-06-21 20:04:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:12,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:13,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:13,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034204849] [2024-06-21 20:04:13,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034204849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:13,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:13,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:13,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57139090] [2024-06-21 20:04:13,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:13,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:13,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:13,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:13,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:13,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:13,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 394 transitions, 7199 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:13,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:13,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:13,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:14,073 INFO L124 PetriNetUnfolderBase]: 3651/6258 cut-off events. [2024-06-21 20:04:14,074 INFO L125 PetriNetUnfolderBase]: For 411629/411636 co-relation queries the response was YES. [2024-06-21 20:04:14,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48234 conditions, 6258 events. 3651/6258 cut-off events. For 411629/411636 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 43757 event pairs, 1233 based on Foata normal form. 4/6254 useless extension candidates. Maximal degree in co-relation 48099. Up to 5431 conditions per place. [2024-06-21 20:04:14,150 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 253 selfloop transitions, 152 changer transitions 1/413 dead transitions. [2024-06-21 20:04:14,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 413 transitions, 8343 flow [2024-06-21 20:04:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:04:14,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:04:14,151 INFO L175 Difference]: Start difference. First operand has 281 places, 394 transitions, 7199 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:04:14,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 413 transitions, 8343 flow [2024-06-21 20:04:15,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 413 transitions, 8129 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:04:15,400 INFO L231 Difference]: Finished difference. Result has 280 places, 396 transitions, 7336 flow [2024-06-21 20:04:15,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6985, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7336, PETRI_PLACES=280, PETRI_TRANSITIONS=396} [2024-06-21 20:04:15,400 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-21 20:04:15,401 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 396 transitions, 7336 flow [2024-06-21 20:04:15,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:15,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:15,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:15,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:04:15,401 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)] === [2024-06-21 20:04:15,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:15,401 INFO L85 PathProgramCache]: Analyzing trace with hash 705718430, now seen corresponding path program 8 times [2024-06-21 20:04:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:15,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781162455] [2024-06-21 20:04:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:15,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:15,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:15,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781162455] [2024-06-21 20:04:15,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781162455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:15,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:15,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:15,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448913025] [2024-06-21 20:04:15,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:15,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:15,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:15,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:15,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 396 transitions, 7336 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:15,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:15,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:15,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:16,555 INFO L124 PetriNetUnfolderBase]: 3619/6198 cut-off events. [2024-06-21 20:04:16,555 INFO L125 PetriNetUnfolderBase]: For 419505/419509 co-relation queries the response was YES. [2024-06-21 20:04:16,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48167 conditions, 6198 events. 3619/6198 cut-off events. For 419505/419509 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43126 event pairs, 1186 based on Foata normal form. 2/6195 useless extension candidates. Maximal degree in co-relation 48032. Up to 5686 conditions per place. [2024-06-21 20:04:16,629 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 370 selfloop transitions, 25 changer transitions 4/406 dead transitions. [2024-06-21 20:04:16,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 406 transitions, 8158 flow [2024-06-21 20:04:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 20:04:16,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-21 20:04:16,630 INFO L175 Difference]: Start difference. First operand has 280 places, 396 transitions, 7336 flow. Second operand 6 states and 134 transitions. [2024-06-21 20:04:16,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 406 transitions, 8158 flow [2024-06-21 20:04:18,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 406 transitions, 7828 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:18,123 INFO L231 Difference]: Finished difference. Result has 282 places, 392 transitions, 6975 flow [2024-06-21 20:04:18,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7006, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6975, PETRI_PLACES=282, PETRI_TRANSITIONS=392} [2024-06-21 20:04:18,124 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-21 20:04:18,124 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 392 transitions, 6975 flow [2024-06-21 20:04:18,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:18,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:18,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:18,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:04:18,124 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)] === [2024-06-21 20:04:18,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash 698486750, now seen corresponding path program 9 times [2024-06-21 20:04:18,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:18,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874869848] [2024-06-21 20:04:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:18,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:18,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874869848] [2024-06-21 20:04:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874869848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:18,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:18,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:18,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455088634] [2024-06-21 20:04:18,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:18,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:18,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:18,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:18,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:18,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:18,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 392 transitions, 6975 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-21 20:04:18,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:18,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:18,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand