./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.2024-05-21_14-57-05.files/protection/safe002_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i ./goblint.2024-05-21_14-57-05.files/protection/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-76401ed-m [2024-06-20 15:13:20,003 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:13:20,190 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:13:20,193 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:13:20,193 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:13:20,230 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:13:20,231 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:13:20,231 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:13:20,232 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:13:20,235 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:13:20,235 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:13:20,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:13:20,236 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:13:20,237 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:13:20,238 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:13:20,238 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:13:20,238 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:13:20,238 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:13:20,238 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:13:20,239 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:13:20,239 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:13:20,239 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:13:20,239 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:13:20,240 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:13:20,240 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:13:20,240 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:13:20,254 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:13:20,254 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:13:20,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:13:20,255 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:13:20,255 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:13:20,256 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:13:20,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:13:20,256 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:13:20,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:13:20,256 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:13:20,256 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:13:20,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:13:20,257 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:13:20,257 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:13:20,257 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:13:20,258 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:13:20,258 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:13:20,258 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:13:20,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:13:20,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:13:20,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:13:20,458 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:13:20,458 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:13:20,459 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2024-06-20 15:13:21,501 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:13:21,693 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:13:21,694 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2024-06-20 15:13:21,705 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b94bdb112/f3dad237a9064544bf4c1099480857e1/FLAG80620ed56 [2024-06-20 15:13:21,718 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b94bdb112/f3dad237a9064544bf4c1099480857e1 [2024-06-20 15:13:21,720 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:13:21,721 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:13:21,722 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe002_tso.yml/witness.yml [2024-06-20 15:13:21,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:13:21,835 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:13:21,836 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:13:21,836 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:13:21,840 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:13:21,840 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:13:21" (1/2) ... [2024-06-20 15:13:21,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7adfb0ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:21, skipping insertion in model container [2024-06-20 15:13:21,842 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:13:21" (1/2) ... [2024-06-20 15:13:21,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c59dd10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:21, skipping insertion in model container [2024-06-20 15:13:21,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:21" (2/2) ... [2024-06-20 15:13:21,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7adfb0ef and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:21, skipping insertion in model container [2024-06-20 15:13:21,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:21" (2/2) ... [2024-06-20 15:13:21,844 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:13:21,880 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:13:21,881 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 15:13:21,881 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 15:13:21,881 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 15:13:21,881 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:13:21,882 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-20 15:13:21,916 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:13:22,233 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:13:22,241 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:13:22,321 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:13:22,352 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:13:22,353 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22 WrapperNode [2024-06-20 15:13:22,353 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:13:22,354 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:13:22,354 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:13:22,354 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:13:22,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (1/1) ... [2024-06-20 15:13:22,377 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (1/1) ... [2024-06-20 15:13:22,419 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-20 15:13:22,420 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:13:22,420 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:13:22,425 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:13:22,425 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:13:22,434 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (1/1) ... [2024-06-20 15:13:22,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (1/1) ... [2024-06-20 15:13:22,451 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (1/1) ... [2024-06-20 15:13:22,467 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 15:13:22,470 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (1/1) ... [2024-06-20 15:13:22,470 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (1/1) ... [2024-06-20 15:13:22,475 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (1/1) ... [2024-06-20 15:13:22,476 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (1/1) ... [2024-06-20 15:13:22,479 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (1/1) ... [2024-06-20 15:13:22,480 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (1/1) ... [2024-06-20 15:13:22,482 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:13:22,483 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:13:22,485 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:13:22,485 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:13:22,486 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (1/1) ... [2024-06-20 15:13:22,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:13:22,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:13:22,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 15:13:22,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 15:13:22,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:13:22,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:13:22,541 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:13:22,541 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:13:22,541 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:13:22,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:13:22,542 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:13:22,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:13:22,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:13:22,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:13:22,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:13:22,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:13:22,543 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:13:22,643 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:13:22,644 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:13:22,801 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:13:22,801 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:13:22,871 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:13:22,871 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:13:22,871 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:13:22 BoogieIcfgContainer [2024-06-20 15:13:22,871 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:13:22,873 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:13:22,873 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:13:22,875 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:13:22,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:13:21" (1/4) ... [2024-06-20 15:13:22,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd2d712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:13:22, skipping insertion in model container [2024-06-20 15:13:22,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:21" (2/4) ... [2024-06-20 15:13:22,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd2d712 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:13:22, skipping insertion in model container [2024-06-20 15:13:22,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:22" (3/4) ... [2024-06-20 15:13:22,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd2d712 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:13:22, skipping insertion in model container [2024-06-20 15:13:22,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:13:22" (4/4) ... [2024-06-20 15:13:22,878 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_tso.i [2024-06-20 15:13:22,891 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:13:22,892 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:13:22,892 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:13:22,959 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:13:22,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 15:13:23,024 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 15:13:23,026 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:13:23,027 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. [2024-06-20 15:13:23,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 15:13:23,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 15:13:23,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:13:23,044 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;@85b406b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:13:23,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:13:23,053 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:13:23,053 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:13:23,053 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:13:23,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:23,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:13:23,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:23,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:23,059 INFO L85 PathProgramCache]: Analyzing trace with hash 219930474, now seen corresponding path program 1 times [2024-06-20 15:13:23,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:23,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665375230] [2024-06-20 15:13:23,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:23,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:23,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:23,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665375230] [2024-06-20 15:13:23,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665375230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:23,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:23,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:13:23,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986242004] [2024-06-20 15:13:23,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:23,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:13:23,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:23,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:13:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:13:23,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-20 15:13:23,505 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) [2024-06-20 15:13:23,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:23,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-20 15:13:23,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:23,657 INFO L124 PetriNetUnfolderBase]: 430/713 cut-off events. [2024-06-20 15:13:23,658 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-06-20 15:13:23,663 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. [2024-06-20 15:13:23,668 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-20 15:13:23,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-20 15:13:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:13:23,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:13:23,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-20 15:13:23,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-20 15:13:23,680 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-20 15:13:23,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-20 15:13:23,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:23,684 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 15:13:23,685 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} [2024-06-20 15:13:23,688 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 15:13:23,689 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 15:13:23,689 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) [2024-06-20 15:13:23,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:23,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:23,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:13:23,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:23,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:23,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1029876338, now seen corresponding path program 1 times [2024-06-20 15:13:23,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:23,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714610222] [2024-06-20 15:13:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:23,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:23,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:23,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714610222] [2024-06-20 15:13:23,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714610222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:23,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:23,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:23,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120292760] [2024-06-20 15:13:23,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:23,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:23,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:23,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:23,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:24,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:24,040 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) [2024-06-20 15:13:24,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:24,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:24,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:24,182 INFO L124 PetriNetUnfolderBase]: 755/1225 cut-off events. [2024-06-20 15:13:24,182 INFO L125 PetriNetUnfolderBase]: For 226/240 co-relation queries the response was YES. [2024-06-20 15:13:24,184 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. [2024-06-20 15:13:24,190 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-20 15:13:24,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 218 flow [2024-06-20 15:13:24,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-20 15:13:24,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:13:24,195 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 104 transitions. [2024-06-20 15:13:24,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 218 flow [2024-06-20 15:13:24,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:24,198 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-20 15:13:24,198 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} [2024-06-20 15:13:24,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-20 15:13:24,199 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-20 15:13:24,200 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) [2024-06-20 15:13:24,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:24,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:24,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:13:24,202 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:24,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:24,204 INFO L85 PathProgramCache]: Analyzing trace with hash 933975979, now seen corresponding path program 1 times [2024-06-20 15:13:24,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:24,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270891694] [2024-06-20 15:13:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:24,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:24,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:24,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270891694] [2024-06-20 15:13:24,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270891694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:24,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:24,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:13:24,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004451291] [2024-06-20 15:13:24,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:24,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:13:24,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:24,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:13:24,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:13:24,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-20 15:13:24,462 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) [2024-06-20 15:13:24,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:24,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-20 15:13:24,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:24,577 INFO L124 PetriNetUnfolderBase]: 583/983 cut-off events. [2024-06-20 15:13:24,577 INFO L125 PetriNetUnfolderBase]: For 496/499 co-relation queries the response was YES. [2024-06-20 15:13:24,579 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. [2024-06-20 15:13:24,584 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 36 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-20 15:13:24,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 259 flow [2024-06-20 15:13:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-20 15:13:24,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:13:24,588 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 4 states and 104 transitions. [2024-06-20 15:13:24,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 259 flow [2024-06-20 15:13:24,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 242 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:24,592 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 164 flow [2024-06-20 15:13:24,592 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} [2024-06-20 15:13:24,593 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2024-06-20 15:13:24,593 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 164 flow [2024-06-20 15:13:24,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:24,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:24,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:24,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:13:24,594 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)] === [2024-06-20 15:13:24,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1111514431, now seen corresponding path program 1 times [2024-06-20 15:13:24,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:24,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066864677] [2024-06-20 15:13:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:24,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:24,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:24,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066864677] [2024-06-20 15:13:24,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066864677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:24,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:24,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536861842] [2024-06-20 15:13:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:24,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:24,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:24,828 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) [2024-06-20 15:13:24,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:24,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:24,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:24,960 INFO L124 PetriNetUnfolderBase]: 890/1463 cut-off events. [2024-06-20 15:13:24,961 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2024-06-20 15:13:24,963 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. [2024-06-20 15:13:24,969 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-20 15:13:24,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 65 transitions, 345 flow [2024-06-20 15:13:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-20 15:13:24,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-20 15:13:24,970 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 164 flow. Second operand 5 states and 119 transitions. [2024-06-20 15:13:24,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 65 transitions, 345 flow [2024-06-20 15:13:24,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 341 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:24,973 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 233 flow [2024-06-20 15:13:24,973 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} [2024-06-20 15:13:24,974 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-20 15:13:24,974 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 233 flow [2024-06-20 15:13:24,974 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) [2024-06-20 15:13:24,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:24,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:24,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:13:24,975 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:24,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:24,975 INFO L85 PathProgramCache]: Analyzing trace with hash 187187522, now seen corresponding path program 1 times [2024-06-20 15:13:24,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:24,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247922440] [2024-06-20 15:13:24,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:24,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:25,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:25,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247922440] [2024-06-20 15:13:25,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247922440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:25,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:25,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:25,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071622139] [2024-06-20 15:13:25,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:25,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:25,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:25,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:25,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:25,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:25,156 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) [2024-06-20 15:13:25,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:25,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:25,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:25,309 INFO L124 PetriNetUnfolderBase]: 885/1465 cut-off events. [2024-06-20 15:13:25,310 INFO L125 PetriNetUnfolderBase]: For 1967/2000 co-relation queries the response was YES. [2024-06-20 15:13:25,312 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. [2024-06-20 15:13:25,317 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 41 selfloop transitions, 14 changer transitions 0/66 dead transitions. [2024-06-20 15:13:25,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 66 transitions, 395 flow [2024-06-20 15:13:25,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:25,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-20 15:13:25,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-06-20 15:13:25,319 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 233 flow. Second operand 4 states and 105 transitions. [2024-06-20 15:13:25,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 66 transitions, 395 flow [2024-06-20 15:13:25,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 395 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:25,322 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 297 flow [2024-06-20 15:13:25,322 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} [2024-06-20 15:13:25,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-20 15:13:25,323 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 297 flow [2024-06-20 15:13:25,323 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) [2024-06-20 15:13:25,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:25,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:25,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:13:25,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:25,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash -934672516, now seen corresponding path program 2 times [2024-06-20 15:13:25,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:25,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121382549] [2024-06-20 15:13:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:25,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:25,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:25,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121382549] [2024-06-20 15:13:25,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121382549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:25,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:25,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:25,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033769752] [2024-06-20 15:13:25,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:25,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:25,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:25,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:25,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:25,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:25,479 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) [2024-06-20 15:13:25,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:25,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:25,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:25,612 INFO L124 PetriNetUnfolderBase]: 877/1456 cut-off events. [2024-06-20 15:13:25,613 INFO L125 PetriNetUnfolderBase]: For 3045/3091 co-relation queries the response was YES. [2024-06-20 15:13:25,616 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. [2024-06-20 15:13:25,623 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 45 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-20 15:13:25,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 489 flow [2024-06-20 15:13:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:13:25,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-20 15:13:25,625 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 297 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:13:25,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 489 flow [2024-06-20 15:13:25,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 453 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:25,630 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 331 flow [2024-06-20 15:13:25,631 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} [2024-06-20 15:13:25,631 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-20 15:13:25,631 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 331 flow [2024-06-20 15:13:25,632 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) [2024-06-20 15:13:25,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:25,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:25,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:13:25,632 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:25,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:25,633 INFO L85 PathProgramCache]: Analyzing trace with hash -934672330, now seen corresponding path program 1 times [2024-06-20 15:13:25,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:25,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098381164] [2024-06-20 15:13:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:25,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:25,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:25,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098381164] [2024-06-20 15:13:25,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098381164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:25,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:25,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:25,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560243464] [2024-06-20 15:13:25,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:25,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:25,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:25,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:25,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:25,777 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) [2024-06-20 15:13:25,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:25,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:25,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:25,955 INFO L124 PetriNetUnfolderBase]: 965/1584 cut-off events. [2024-06-20 15:13:25,955 INFO L125 PetriNetUnfolderBase]: For 3011/3013 co-relation queries the response was YES. [2024-06-20 15:13:25,959 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. [2024-06-20 15:13:25,967 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 60 selfloop transitions, 27 changer transitions 0/94 dead transitions. [2024-06-20 15:13:25,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 651 flow [2024-06-20 15:13:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:13:25,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-20 15:13:25,968 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 331 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:13:25,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 651 flow [2024-06-20 15:13:25,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 609 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:25,973 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 456 flow [2024-06-20 15:13:25,974 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} [2024-06-20 15:13:25,974 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-20 15:13:25,974 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 456 flow [2024-06-20 15:13:25,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:25,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:25,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:25,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:13:25,975 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)] === [2024-06-20 15:13:25,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:25,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2137423252, now seen corresponding path program 2 times [2024-06-20 15:13:25,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:25,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830463242] [2024-06-20 15:13:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:25,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:26,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:26,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830463242] [2024-06-20 15:13:26,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830463242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:26,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:26,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:26,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794988140] [2024-06-20 15:13:26,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:26,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:26,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:26,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:26,108 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) [2024-06-20 15:13:26,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:26,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:26,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:26,272 INFO L124 PetriNetUnfolderBase]: 960/1588 cut-off events. [2024-06-20 15:13:26,272 INFO L125 PetriNetUnfolderBase]: For 4726/4728 co-relation queries the response was YES. [2024-06-20 15:13:26,276 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. [2024-06-20 15:13:26,283 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 74 selfloop transitions, 20 changer transitions 0/101 dead transitions. [2024-06-20 15:13:26,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 780 flow [2024-06-20 15:13:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 15:13:26,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-20 15:13:26,285 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 456 flow. Second operand 6 states and 143 transitions. [2024-06-20 15:13:26,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 780 flow [2024-06-20 15:13:26,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 101 transitions, 730 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:26,294 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 581 flow [2024-06-20 15:13:26,295 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} [2024-06-20 15:13:26,295 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-20 15:13:26,295 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 581 flow [2024-06-20 15:13:26,295 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) [2024-06-20 15:13:26,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:26,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:26,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:13:26,296 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:26,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:26,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1281530880, now seen corresponding path program 1 times [2024-06-20 15:13:26,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:26,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641036072] [2024-06-20 15:13:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:26,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:26,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:26,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641036072] [2024-06-20 15:13:26,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641036072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:26,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:26,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:26,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302578599] [2024-06-20 15:13:26,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:26,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:26,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:26,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:26,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:26,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:26,435 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) [2024-06-20 15:13:26,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:26,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:26,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:26,623 INFO L124 PetriNetUnfolderBase]: 952/1574 cut-off events. [2024-06-20 15:13:26,623 INFO L125 PetriNetUnfolderBase]: For 5734/5734 co-relation queries the response was YES. [2024-06-20 15:13:26,628 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. [2024-06-20 15:13:26,636 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 85 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2024-06-20 15:13:26,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 104 transitions, 843 flow [2024-06-20 15:13:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 15:13:26,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:13:26,638 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 581 flow. Second operand 6 states and 140 transitions. [2024-06-20 15:13:26,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 104 transitions, 843 flow [2024-06-20 15:13:26,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 104 transitions, 825 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:26,648 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 616 flow [2024-06-20 15:13:26,649 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} [2024-06-20 15:13:26,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-20 15:13:26,649 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 616 flow [2024-06-20 15:13:26,649 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) [2024-06-20 15:13:26,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:26,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:26,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:13:26,650 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:26,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1626430724, now seen corresponding path program 1 times [2024-06-20 15:13:26,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:26,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013107979] [2024-06-20 15:13:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:26,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:26,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:26,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013107979] [2024-06-20 15:13:26,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013107979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:26,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:26,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:26,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923500901] [2024-06-20 15:13:26,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:26,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:26,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:26,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:26,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:26,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:26,813 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) [2024-06-20 15:13:26,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:26,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:26,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:27,020 INFO L124 PetriNetUnfolderBase]: 1092/1787 cut-off events. [2024-06-20 15:13:27,021 INFO L125 PetriNetUnfolderBase]: For 7493/7497 co-relation queries the response was YES. [2024-06-20 15:13:27,026 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. [2024-06-20 15:13:27,035 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 82 selfloop transitions, 51 changer transitions 0/140 dead transitions. [2024-06-20 15:13:27,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 140 transitions, 1264 flow [2024-06-20 15:13:27,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:27,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:13:27,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:13:27,037 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 616 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:13:27,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 140 transitions, 1264 flow [2024-06-20 15:13:27,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 140 transitions, 1229 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:27,086 INFO L231 Difference]: Finished difference. Result has 82 places, 118 transitions, 1074 flow [2024-06-20 15:13:27,087 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} [2024-06-20 15:13:27,087 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-20 15:13:27,087 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 118 transitions, 1074 flow [2024-06-20 15:13:27,088 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) [2024-06-20 15:13:27,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:27,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:27,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:13:27,088 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:27,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:27,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1089929948, now seen corresponding path program 2 times [2024-06-20 15:13:27,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:27,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475251972] [2024-06-20 15:13:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:27,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:27,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:27,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475251972] [2024-06-20 15:13:27,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475251972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:27,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:27,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:27,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523222137] [2024-06-20 15:13:27,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:27,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:27,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:27,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:27,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:27,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:27,246 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) [2024-06-20 15:13:27,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:27,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:27,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:27,472 INFO L124 PetriNetUnfolderBase]: 1163/1911 cut-off events. [2024-06-20 15:13:27,472 INFO L125 PetriNetUnfolderBase]: For 11177/11181 co-relation queries the response was YES. [2024-06-20 15:13:27,478 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. [2024-06-20 15:13:27,487 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 76 selfloop transitions, 78 changer transitions 0/161 dead transitions. [2024-06-20 15:13:27,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 161 transitions, 1714 flow [2024-06-20 15:13:27,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:13:27,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-20 15:13:27,488 INFO L175 Difference]: Start difference. First operand has 82 places, 118 transitions, 1074 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:13:27,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 161 transitions, 1714 flow [2024-06-20 15:13:27,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 161 transitions, 1684 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:27,511 INFO L231 Difference]: Finished difference. Result has 91 places, 132 transitions, 1438 flow [2024-06-20 15:13:27,511 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} [2024-06-20 15:13:27,512 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-20 15:13:27,512 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 132 transitions, 1438 flow [2024-06-20 15:13:27,512 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) [2024-06-20 15:13:27,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:27,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:27,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:13:27,513 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:27,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:27,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1089924368, now seen corresponding path program 3 times [2024-06-20 15:13:27,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:27,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420727620] [2024-06-20 15:13:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:27,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:27,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420727620] [2024-06-20 15:13:27,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420727620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:27,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:27,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:27,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585682373] [2024-06-20 15:13:27,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:27,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:27,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:27,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:27,692 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) [2024-06-20 15:13:27,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:27,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:27,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:27,948 INFO L124 PetriNetUnfolderBase]: 1186/1953 cut-off events. [2024-06-20 15:13:27,949 INFO L125 PetriNetUnfolderBase]: For 14976/14980 co-relation queries the response was YES. [2024-06-20 15:13:27,956 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. [2024-06-20 15:13:27,965 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 85 selfloop transitions, 83 changer transitions 0/175 dead transitions. [2024-06-20 15:13:27,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 2076 flow [2024-06-20 15:13:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:13:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:13:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 15:13:27,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:13:27,966 INFO L175 Difference]: Start difference. First operand has 91 places, 132 transitions, 1438 flow. Second operand 9 states and 222 transitions. [2024-06-20 15:13:27,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 2076 flow [2024-06-20 15:13:27,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 175 transitions, 1990 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:28,000 INFO L231 Difference]: Finished difference. Result has 98 places, 140 transitions, 1651 flow [2024-06-20 15:13:28,000 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} [2024-06-20 15:13:28,001 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-20 15:13:28,001 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 140 transitions, 1651 flow [2024-06-20 15:13:28,001 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) [2024-06-20 15:13:28,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:28,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:28,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:13:28,002 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:28,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:28,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1835612478, now seen corresponding path program 4 times [2024-06-20 15:13:28,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:28,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050046892] [2024-06-20 15:13:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:28,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:28,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:28,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050046892] [2024-06-20 15:13:28,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050046892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:28,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:28,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:28,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377927874] [2024-06-20 15:13:28,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:28,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:28,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:28,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:28,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:28,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:28,145 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) [2024-06-20 15:13:28,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:28,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:28,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:28,355 INFO L124 PetriNetUnfolderBase]: 1181/1961 cut-off events. [2024-06-20 15:13:28,356 INFO L125 PetriNetUnfolderBase]: For 16094/16098 co-relation queries the response was YES. [2024-06-20 15:13:28,363 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. [2024-06-20 15:13:28,372 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 131 selfloop transitions, 42 changer transitions 0/180 dead transitions. [2024-06-20 15:13:28,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 2263 flow [2024-06-20 15:13:28,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:13:28,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-20 15:13:28,374 INFO L175 Difference]: Start difference. First operand has 98 places, 140 transitions, 1651 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:13:28,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 2263 flow [2024-06-20 15:13:28,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 180 transitions, 2081 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:28,410 INFO L231 Difference]: Finished difference. Result has 103 places, 157 transitions, 1843 flow [2024-06-20 15:13:28,410 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} [2024-06-20 15:13:28,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-20 15:13:28,411 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 157 transitions, 1843 flow [2024-06-20 15:13:28,411 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) [2024-06-20 15:13:28,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:28,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:28,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:13:28,412 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)] === [2024-06-20 15:13:28,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2003529296, now seen corresponding path program 1 times [2024-06-20 15:13:28,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:28,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481851447] [2024-06-20 15:13:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:28,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:28,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:28,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481851447] [2024-06-20 15:13:28,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481851447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:28,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:28,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:28,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897369398] [2024-06-20 15:13:28,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:28,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:28,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:28,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:28,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:28,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:28,539 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) [2024-06-20 15:13:28,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:28,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:28,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:28,746 INFO L124 PetriNetUnfolderBase]: 1115/1865 cut-off events. [2024-06-20 15:13:28,747 INFO L125 PetriNetUnfolderBase]: For 17546/17551 co-relation queries the response was YES. [2024-06-20 15:13:28,754 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. [2024-06-20 15:13:28,763 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 128 selfloop transitions, 16 changer transitions 0/166 dead transitions. [2024-06-20 15:13:28,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 166 transitions, 2165 flow [2024-06-20 15:13:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-20 15:13:28,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:13:28,764 INFO L175 Difference]: Start difference. First operand has 103 places, 157 transitions, 1843 flow. Second operand 4 states and 100 transitions. [2024-06-20 15:13:28,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 166 transitions, 2165 flow [2024-06-20 15:13:28,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 166 transitions, 2087 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:28,806 INFO L231 Difference]: Finished difference. Result has 106 places, 157 transitions, 1807 flow [2024-06-20 15:13:28,806 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} [2024-06-20 15:13:28,806 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-20 15:13:28,807 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 157 transitions, 1807 flow [2024-06-20 15:13:28,807 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) [2024-06-20 15:13:28,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:28,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:28,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:13:28,807 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:28,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:28,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1546136027, now seen corresponding path program 1 times [2024-06-20 15:13:28,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:28,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62180515] [2024-06-20 15:13:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:28,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:28,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:28,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62180515] [2024-06-20 15:13:28,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62180515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:28,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:28,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:28,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398310385] [2024-06-20 15:13:28,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:28,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:28,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:28,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:28,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:28,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:28,974 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) [2024-06-20 15:13:28,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:28,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:28,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:29,232 INFO L124 PetriNetUnfolderBase]: 1177/1946 cut-off events. [2024-06-20 15:13:29,232 INFO L125 PetriNetUnfolderBase]: For 20993/21065 co-relation queries the response was YES. [2024-06-20 15:13:29,241 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. [2024-06-20 15:13:29,250 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 128 selfloop transitions, 33 changer transitions 0/186 dead transitions. [2024-06-20 15:13:29,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 186 transitions, 2319 flow [2024-06-20 15:13:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:13:29,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-20 15:13:29,252 INFO L175 Difference]: Start difference. First operand has 106 places, 157 transitions, 1807 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:13:29,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 186 transitions, 2319 flow [2024-06-20 15:13:29,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 2287 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:29,296 INFO L231 Difference]: Finished difference. Result has 109 places, 161 transitions, 1908 flow [2024-06-20 15:13:29,297 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} [2024-06-20 15:13:29,297 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-20 15:13:29,297 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 161 transitions, 1908 flow [2024-06-20 15:13:29,298 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) [2024-06-20 15:13:29,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:29,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:29,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:13:29,298 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)] === [2024-06-20 15:13:29,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:29,299 INFO L85 PathProgramCache]: Analyzing trace with hash 172091409, now seen corresponding path program 2 times [2024-06-20 15:13:29,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:29,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127385186] [2024-06-20 15:13:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:29,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:29,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:29,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127385186] [2024-06-20 15:13:29,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127385186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:29,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:29,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:29,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525002018] [2024-06-20 15:13:29,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:29,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:29,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:29,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:29,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:29,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:29,454 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) [2024-06-20 15:13:29,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:29,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:29,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:29,712 INFO L124 PetriNetUnfolderBase]: 1164/1931 cut-off events. [2024-06-20 15:13:29,712 INFO L125 PetriNetUnfolderBase]: For 23057/23136 co-relation queries the response was YES. [2024-06-20 15:13:29,720 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. [2024-06-20 15:13:29,729 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 29 changer transitions 0/179 dead transitions. [2024-06-20 15:13:29,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 179 transitions, 2284 flow [2024-06-20 15:13:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:29,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:13:29,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-20 15:13:29,731 INFO L175 Difference]: Start difference. First operand has 109 places, 161 transitions, 1908 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:13:29,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 179 transitions, 2284 flow [2024-06-20 15:13:29,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 179 transitions, 2218 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:29,788 INFO L231 Difference]: Finished difference. Result has 112 places, 161 transitions, 1909 flow [2024-06-20 15:13:29,788 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} [2024-06-20 15:13:29,789 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-20 15:13:29,789 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 161 transitions, 1909 flow [2024-06-20 15:13:29,789 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) [2024-06-20 15:13:29,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:29,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:29,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:13:29,790 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)] === [2024-06-20 15:13:29,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:29,790 INFO L85 PathProgramCache]: Analyzing trace with hash -572086597, now seen corresponding path program 3 times [2024-06-20 15:13:29,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:29,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243571014] [2024-06-20 15:13:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:29,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:29,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:29,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243571014] [2024-06-20 15:13:29,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243571014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:29,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:29,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:29,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728826663] [2024-06-20 15:13:29,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:29,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:29,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:29,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:29,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:29,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:29,938 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) [2024-06-20 15:13:29,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:29,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:29,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:30,212 INFO L124 PetriNetUnfolderBase]: 1151/1912 cut-off events. [2024-06-20 15:13:30,212 INFO L125 PetriNetUnfolderBase]: For 23943/24010 co-relation queries the response was YES. [2024-06-20 15:13:30,220 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. [2024-06-20 15:13:30,228 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 126 selfloop transitions, 34 changer transitions 0/185 dead transitions. [2024-06-20 15:13:30,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 185 transitions, 2339 flow [2024-06-20 15:13:30,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:13:30,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-20 15:13:30,230 INFO L175 Difference]: Start difference. First operand has 112 places, 161 transitions, 1909 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:13:30,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 185 transitions, 2339 flow [2024-06-20 15:13:30,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 185 transitions, 2275 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:30,284 INFO L231 Difference]: Finished difference. Result has 114 places, 163 transitions, 1957 flow [2024-06-20 15:13:30,285 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} [2024-06-20 15:13:30,285 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-20 15:13:30,285 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 163 transitions, 1957 flow [2024-06-20 15:13:30,285 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) [2024-06-20 15:13:30,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:30,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:30,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:13:30,286 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)] === [2024-06-20 15:13:30,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:30,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1427803199, now seen corresponding path program 1 times [2024-06-20 15:13:30,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:30,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171065966] [2024-06-20 15:13:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:30,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:30,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:30,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171065966] [2024-06-20 15:13:30,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171065966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:30,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:30,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:30,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509820205] [2024-06-20 15:13:30,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:30,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:30,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:30,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:30,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:30,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:30,459 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) [2024-06-20 15:13:30,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:30,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:30,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:30,790 INFO L124 PetriNetUnfolderBase]: 1318/2170 cut-off events. [2024-06-20 15:13:30,791 INFO L125 PetriNetUnfolderBase]: For 28300/28307 co-relation queries the response was YES. [2024-06-20 15:13:30,800 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. [2024-06-20 15:13:30,808 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 132 selfloop transitions, 56 changer transitions 0/195 dead transitions. [2024-06-20 15:13:30,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 195 transitions, 2527 flow [2024-06-20 15:13:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:13:30,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:13:30,811 INFO L175 Difference]: Start difference. First operand has 114 places, 163 transitions, 1957 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:13:30,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 195 transitions, 2527 flow [2024-06-20 15:13:30,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 195 transitions, 2441 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:30,866 INFO L231 Difference]: Finished difference. Result has 118 places, 167 transitions, 2066 flow [2024-06-20 15:13:30,866 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} [2024-06-20 15:13:30,866 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-20 15:13:30,866 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 167 transitions, 2066 flow [2024-06-20 15:13:30,867 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) [2024-06-20 15:13:30,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:30,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:30,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:13:30,867 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:30,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:30,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1069420051, now seen corresponding path program 2 times [2024-06-20 15:13:30,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:30,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493709431] [2024-06-20 15:13:30,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:30,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:30,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:30,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493709431] [2024-06-20 15:13:30,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493709431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:30,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:30,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:30,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524374537] [2024-06-20 15:13:30,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:30,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:30,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:30,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:30,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:31,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:31,025 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) [2024-06-20 15:13:31,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:31,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:31,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:31,331 INFO L124 PetriNetUnfolderBase]: 1335/2193 cut-off events. [2024-06-20 15:13:31,331 INFO L125 PetriNetUnfolderBase]: For 28568/28575 co-relation queries the response was YES. [2024-06-20 15:13:31,339 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. [2024-06-20 15:13:31,347 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 158 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2024-06-20 15:13:31,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 193 transitions, 2526 flow [2024-06-20 15:13:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:13:31,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-20 15:13:31,349 INFO L175 Difference]: Start difference. First operand has 118 places, 167 transitions, 2066 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:13:31,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 193 transitions, 2526 flow [2024-06-20 15:13:31,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 193 transitions, 2387 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:31,410 INFO L231 Difference]: Finished difference. Result has 119 places, 169 transitions, 2022 flow [2024-06-20 15:13:31,410 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} [2024-06-20 15:13:31,410 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-20 15:13:31,410 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 169 transitions, 2022 flow [2024-06-20 15:13:31,411 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) [2024-06-20 15:13:31,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:31,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:31,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:13:31,411 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:31,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1077990931, now seen corresponding path program 3 times [2024-06-20 15:13:31,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:31,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771200643] [2024-06-20 15:13:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:31,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:31,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:31,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771200643] [2024-06-20 15:13:31,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771200643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:31,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:31,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:31,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848788546] [2024-06-20 15:13:31,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:31,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:31,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:31,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:31,555 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) [2024-06-20 15:13:31,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:31,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:31,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:31,877 INFO L124 PetriNetUnfolderBase]: 1327/2185 cut-off events. [2024-06-20 15:13:31,878 INFO L125 PetriNetUnfolderBase]: For 29128/29135 co-relation queries the response was YES. [2024-06-20 15:13:31,886 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. [2024-06-20 15:13:31,894 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 157 selfloop transitions, 33 changer transitions 0/197 dead transitions. [2024-06-20 15:13:31,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 2504 flow [2024-06-20 15:13:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:31,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 15:13:31,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-20 15:13:31,895 INFO L175 Difference]: Start difference. First operand has 119 places, 169 transitions, 2022 flow. Second operand 7 states and 165 transitions. [2024-06-20 15:13:31,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 2504 flow [2024-06-20 15:13:31,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 197 transitions, 2427 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:31,953 INFO L231 Difference]: Finished difference. Result has 122 places, 172 transitions, 2074 flow [2024-06-20 15:13:31,954 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} [2024-06-20 15:13:31,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-20 15:13:31,954 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 172 transitions, 2074 flow [2024-06-20 15:13:31,955 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) [2024-06-20 15:13:31,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:31,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:31,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:13:31,955 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:31,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:31,955 INFO L85 PathProgramCache]: Analyzing trace with hash -685575289, now seen corresponding path program 1 times [2024-06-20 15:13:31,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:31,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032298374] [2024-06-20 15:13:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:31,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:32,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:32,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032298374] [2024-06-20 15:13:32,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032298374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:32,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:32,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:32,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608711266] [2024-06-20 15:13:32,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:32,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:32,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:32,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:32,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:32,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:32,140 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) [2024-06-20 15:13:32,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:32,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:32,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:32,711 INFO L124 PetriNetUnfolderBase]: 2300/3837 cut-off events. [2024-06-20 15:13:32,711 INFO L125 PetriNetUnfolderBase]: For 69604/69608 co-relation queries the response was YES. [2024-06-20 15:13:32,728 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. [2024-06-20 15:13:32,746 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 171 selfloop transitions, 68 changer transitions 0/246 dead transitions. [2024-06-20 15:13:32,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 246 transitions, 3243 flow [2024-06-20 15:13:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:32,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-20 15:13:32,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.678125 [2024-06-20 15:13:32,749 INFO L175 Difference]: Start difference. First operand has 122 places, 172 transitions, 2074 flow. Second operand 8 states and 217 transitions. [2024-06-20 15:13:32,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 246 transitions, 3243 flow [2024-06-20 15:13:32,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 246 transitions, 3152 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:32,845 INFO L231 Difference]: Finished difference. Result has 128 places, 191 transitions, 2464 flow [2024-06-20 15:13:32,845 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} [2024-06-20 15:13:32,846 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-20 15:13:32,846 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 191 transitions, 2464 flow [2024-06-20 15:13:32,846 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) [2024-06-20 15:13:32,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:32,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:32,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:13:32,847 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:32,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash -767542705, now seen corresponding path program 2 times [2024-06-20 15:13:32,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:32,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155798673] [2024-06-20 15:13:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:32,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:32,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:32,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155798673] [2024-06-20 15:13:32,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155798673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:32,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:32,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:32,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764497994] [2024-06-20 15:13:32,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:32,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:32,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:33,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:33,041 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) [2024-06-20 15:13:33,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:33,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:33,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:33,594 INFO L124 PetriNetUnfolderBase]: 2449/4118 cut-off events. [2024-06-20 15:13:33,595 INFO L125 PetriNetUnfolderBase]: For 78434/78438 co-relation queries the response was YES. [2024-06-20 15:13:33,612 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. [2024-06-20 15:13:33,626 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 150 selfloop transitions, 66 changer transitions 0/223 dead transitions. [2024-06-20 15:13:33,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 223 transitions, 3103 flow [2024-06-20 15:13:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:13:33,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-20 15:13:33,634 INFO L175 Difference]: Start difference. First operand has 128 places, 191 transitions, 2464 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:13:33,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 223 transitions, 3103 flow [2024-06-20 15:13:33,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 223 transitions, 2936 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:33,771 INFO L231 Difference]: Finished difference. Result has 132 places, 194 transitions, 2514 flow [2024-06-20 15:13:33,771 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} [2024-06-20 15:13:33,772 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-20 15:13:33,772 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 194 transitions, 2514 flow [2024-06-20 15:13:33,772 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) [2024-06-20 15:13:33,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:33,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:33,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:13:33,773 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:33,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:33,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1039867675, now seen corresponding path program 3 times [2024-06-20 15:13:33,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:33,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068193784] [2024-06-20 15:13:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:33,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:33,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:33,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068193784] [2024-06-20 15:13:33,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068193784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:33,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:33,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:33,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546325340] [2024-06-20 15:13:33,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:33,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:33,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:33,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:33,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:33,967 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) [2024-06-20 15:13:33,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:33,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:33,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:34,560 INFO L124 PetriNetUnfolderBase]: 2560/4329 cut-off events. [2024-06-20 15:13:34,561 INFO L125 PetriNetUnfolderBase]: For 80929/80933 co-relation queries the response was YES. [2024-06-20 15:13:34,580 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. [2024-06-20 15:13:34,595 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 169 selfloop transitions, 64 changer transitions 0/240 dead transitions. [2024-06-20 15:13:34,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 240 transitions, 3378 flow [2024-06-20 15:13:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 15:13:34,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-06-20 15:13:34,596 INFO L175 Difference]: Start difference. First operand has 132 places, 194 transitions, 2514 flow. Second operand 7 states and 185 transitions. [2024-06-20 15:13:34,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 240 transitions, 3378 flow [2024-06-20 15:13:34,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 240 transitions, 3270 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:34,726 INFO L231 Difference]: Finished difference. Result has 136 places, 203 transitions, 2742 flow [2024-06-20 15:13:34,726 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} [2024-06-20 15:13:34,727 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-20 15:13:34,727 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 203 transitions, 2742 flow [2024-06-20 15:13:34,727 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) [2024-06-20 15:13:34,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:34,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:34,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:13:34,728 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:34,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:34,728 INFO L85 PathProgramCache]: Analyzing trace with hash -554666161, now seen corresponding path program 4 times [2024-06-20 15:13:34,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:34,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170813774] [2024-06-20 15:13:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:34,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:34,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:34,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170813774] [2024-06-20 15:13:34,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170813774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:34,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:34,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:34,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467472284] [2024-06-20 15:13:34,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:34,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:34,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:34,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:34,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:34,898 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) [2024-06-20 15:13:34,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:34,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:34,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:35,531 INFO L124 PetriNetUnfolderBase]: 2747/4658 cut-off events. [2024-06-20 15:13:35,531 INFO L125 PetriNetUnfolderBase]: For 90599/90603 co-relation queries the response was YES. [2024-06-20 15:13:35,553 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. [2024-06-20 15:13:35,569 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 142 selfloop transitions, 97 changer transitions 0/246 dead transitions. [2024-06-20 15:13:35,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 246 transitions, 3500 flow [2024-06-20 15:13:35,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:13:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:13:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-20 15:13:35,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6175 [2024-06-20 15:13:35,570 INFO L175 Difference]: Start difference. First operand has 136 places, 203 transitions, 2742 flow. Second operand 10 states and 247 transitions. [2024-06-20 15:13:35,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 246 transitions, 3500 flow [2024-06-20 15:13:35,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 246 transitions, 3377 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:35,749 INFO L231 Difference]: Finished difference. Result has 143 places, 205 transitions, 2882 flow [2024-06-20 15:13:35,749 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} [2024-06-20 15:13:35,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-20 15:13:35,750 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 205 transitions, 2882 flow [2024-06-20 15:13:35,750 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) [2024-06-20 15:13:35,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:35,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:35,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:13:35,751 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:35,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:35,751 INFO L85 PathProgramCache]: Analyzing trace with hash -549303781, now seen corresponding path program 5 times [2024-06-20 15:13:35,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:35,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668157206] [2024-06-20 15:13:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:35,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:35,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:35,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668157206] [2024-06-20 15:13:35,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668157206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:35,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:35,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:35,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884725274] [2024-06-20 15:13:35,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:35,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:35,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:35,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:35,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:35,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:35,922 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) [2024-06-20 15:13:35,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:35,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:35,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:36,631 INFO L124 PetriNetUnfolderBase]: 2934/4990 cut-off events. [2024-06-20 15:13:36,632 INFO L125 PetriNetUnfolderBase]: For 98580/98584 co-relation queries the response was YES. [2024-06-20 15:13:36,658 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. [2024-06-20 15:13:36,676 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 134 selfloop transitions, 100 changer transitions 0/241 dead transitions. [2024-06-20 15:13:36,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 241 transitions, 3620 flow [2024-06-20 15:13:36,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:13:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:13:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-20 15:13:36,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-20 15:13:36,678 INFO L175 Difference]: Start difference. First operand has 143 places, 205 transitions, 2882 flow. Second operand 9 states and 221 transitions. [2024-06-20 15:13:36,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 241 transitions, 3620 flow [2024-06-20 15:13:36,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 241 transitions, 3383 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-20 15:13:36,874 INFO L231 Difference]: Finished difference. Result has 144 places, 207 transitions, 2918 flow [2024-06-20 15:13:36,874 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} [2024-06-20 15:13:36,874 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-20 15:13:36,874 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 207 transitions, 2918 flow [2024-06-20 15:13:36,875 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) [2024-06-20 15:13:36,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:36,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:36,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:13:36,875 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:36,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash -554814031, now seen corresponding path program 6 times [2024-06-20 15:13:36,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:36,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957126796] [2024-06-20 15:13:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:36,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:37,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:37,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957126796] [2024-06-20 15:13:37,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957126796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:37,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:37,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:37,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114119488] [2024-06-20 15:13:37,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:37,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:37,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:37,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:37,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:37,110 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) [2024-06-20 15:13:37,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:37,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:37,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:37,895 INFO L124 PetriNetUnfolderBase]: 3266/5581 cut-off events. [2024-06-20 15:13:37,895 INFO L125 PetriNetUnfolderBase]: For 113600/113604 co-relation queries the response was YES. [2024-06-20 15:13:37,931 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. [2024-06-20 15:13:37,950 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 154 selfloop transitions, 100 changer transitions 0/261 dead transitions. [2024-06-20 15:13:37,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 261 transitions, 3872 flow [2024-06-20 15:13:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:13:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:13:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-20 15:13:37,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-20 15:13:37,952 INFO L175 Difference]: Start difference. First operand has 144 places, 207 transitions, 2918 flow. Second operand 10 states and 252 transitions. [2024-06-20 15:13:37,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 261 transitions, 3872 flow [2024-06-20 15:13:38,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 261 transitions, 3633 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:38,258 INFO L231 Difference]: Finished difference. Result has 148 places, 212 transitions, 3034 flow [2024-06-20 15:13:38,258 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} [2024-06-20 15:13:38,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-20 15:13:38,259 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 212 transitions, 3034 flow [2024-06-20 15:13:38,259 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) [2024-06-20 15:13:38,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:38,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:38,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:13:38,259 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:38,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:38,260 INFO L85 PathProgramCache]: Analyzing trace with hash -549088579, now seen corresponding path program 1 times [2024-06-20 15:13:38,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:38,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921359122] [2024-06-20 15:13:38,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:38,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:38,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:38,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921359122] [2024-06-20 15:13:38,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921359122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:38,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:38,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:38,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480002351] [2024-06-20 15:13:38,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:38,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:38,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:38,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:38,448 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) [2024-06-20 15:13:38,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:38,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:38,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:39,211 INFO L124 PetriNetUnfolderBase]: 3590/6168 cut-off events. [2024-06-20 15:13:39,211 INFO L125 PetriNetUnfolderBase]: For 136274/136278 co-relation queries the response was YES. [2024-06-20 15:13:39,248 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. [2024-06-20 15:13:39,267 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 134 selfloop transitions, 115 changer transitions 0/256 dead transitions. [2024-06-20 15:13:39,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 256 transitions, 3940 flow [2024-06-20 15:13:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:13:39,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:13:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-20 15:13:39,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-20 15:13:39,269 INFO L175 Difference]: Start difference. First operand has 148 places, 212 transitions, 3034 flow. Second operand 9 states and 227 transitions. [2024-06-20 15:13:39,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 256 transitions, 3940 flow [2024-06-20 15:13:39,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 256 transitions, 3685 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:39,555 INFO L231 Difference]: Finished difference. Result has 150 places, 215 transitions, 3123 flow [2024-06-20 15:13:39,555 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} [2024-06-20 15:13:39,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-20 15:13:39,556 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 215 transitions, 3123 flow [2024-06-20 15:13:39,556 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) [2024-06-20 15:13:39,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:39,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:39,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:13:39,557 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:39,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:39,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1207930883, now seen corresponding path program 7 times [2024-06-20 15:13:39,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:39,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225730183] [2024-06-20 15:13:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:39,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:39,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:39,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225730183] [2024-06-20 15:13:39,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225730183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:39,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:39,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:39,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923730170] [2024-06-20 15:13:39,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:39,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:39,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:39,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:39,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:39,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:39,752 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) [2024-06-20 15:13:39,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:39,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:39,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:40,474 INFO L124 PetriNetUnfolderBase]: 3623/6228 cut-off events. [2024-06-20 15:13:40,474 INFO L125 PetriNetUnfolderBase]: For 134570/134574 co-relation queries the response was YES. [2024-06-20 15:13:40,514 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. [2024-06-20 15:13:40,537 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 197 selfloop transitions, 43 changer transitions 0/247 dead transitions. [2024-06-20 15:13:40,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 247 transitions, 3731 flow [2024-06-20 15:13:40,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:40,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:13:40,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 15:13:40,538 INFO L175 Difference]: Start difference. First operand has 150 places, 215 transitions, 3123 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:13:40,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 247 transitions, 3731 flow [2024-06-20 15:13:40,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 247 transitions, 3548 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:40,879 INFO L231 Difference]: Finished difference. Result has 153 places, 216 transitions, 3067 flow [2024-06-20 15:13:40,879 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} [2024-06-20 15:13:40,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-20 15:13:40,880 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 216 transitions, 3067 flow [2024-06-20 15:13:40,880 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) [2024-06-20 15:13:40,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:40,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:40,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:13:40,880 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:40,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:40,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1207715681, now seen corresponding path program 2 times [2024-06-20 15:13:40,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:40,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056685764] [2024-06-20 15:13:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:40,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:40,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:40,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056685764] [2024-06-20 15:13:40,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056685764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:40,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:40,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:40,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244093576] [2024-06-20 15:13:40,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:41,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:41,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:41,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:41,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:41,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:41,066 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) [2024-06-20 15:13:41,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:41,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:41,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:41,819 INFO L124 PetriNetUnfolderBase]: 3664/6305 cut-off events. [2024-06-20 15:13:41,820 INFO L125 PetriNetUnfolderBase]: For 138660/138664 co-relation queries the response was YES. [2024-06-20 15:13:41,857 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. [2024-06-20 15:13:41,877 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 199 selfloop transitions, 45 changer transitions 0/251 dead transitions. [2024-06-20 15:13:41,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 251 transitions, 3701 flow [2024-06-20 15:13:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:13:41,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 15:13:41,879 INFO L175 Difference]: Start difference. First operand has 153 places, 216 transitions, 3067 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:13:41,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 251 transitions, 3701 flow [2024-06-20 15:13:42,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 251 transitions, 3588 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:42,111 INFO L231 Difference]: Finished difference. Result has 155 places, 217 transitions, 3086 flow [2024-06-20 15:13:42,111 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} [2024-06-20 15:13:42,112 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-20 15:13:42,112 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 217 transitions, 3086 flow [2024-06-20 15:13:42,112 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) [2024-06-20 15:13:42,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:42,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:42,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:13:42,113 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:42,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:42,113 INFO L85 PathProgramCache]: Analyzing trace with hash -942018401, now seen corresponding path program 3 times [2024-06-20 15:13:42,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:42,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878517822] [2024-06-20 15:13:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:42,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:42,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:42,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878517822] [2024-06-20 15:13:42,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878517822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:42,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:42,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:42,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821062140] [2024-06-20 15:13:42,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:42,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:42,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:42,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:42,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:42,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:42,276 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) [2024-06-20 15:13:42,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:42,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:42,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:43,053 INFO L124 PetriNetUnfolderBase]: 3644/6273 cut-off events. [2024-06-20 15:13:43,053 INFO L125 PetriNetUnfolderBase]: For 141815/141819 co-relation queries the response was YES. [2024-06-20 15:13:43,084 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. [2024-06-20 15:13:43,102 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 190 selfloop transitions, 54 changer transitions 0/251 dead transitions. [2024-06-20 15:13:43,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 251 transitions, 3632 flow [2024-06-20 15:13:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:13:43,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:13:43,104 INFO L175 Difference]: Start difference. First operand has 155 places, 217 transitions, 3086 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:13:43,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 251 transitions, 3632 flow [2024-06-20 15:13:43,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 251 transitions, 3512 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 15:13:43,345 INFO L231 Difference]: Finished difference. Result has 156 places, 216 transitions, 3022 flow [2024-06-20 15:13:43,345 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} [2024-06-20 15:13:43,346 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-20 15:13:43,346 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 216 transitions, 3022 flow [2024-06-20 15:13:43,346 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) [2024-06-20 15:13:43,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:43,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:43,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:13:43,347 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)] === [2024-06-20 15:13:43,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:43,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1246283889, now seen corresponding path program 1 times [2024-06-20 15:13:43,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:43,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588388964] [2024-06-20 15:13:43,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:43,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:43,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:43,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588388964] [2024-06-20 15:13:43,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588388964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:43,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:43,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:43,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872096512] [2024-06-20 15:13:43,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:43,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:43,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:43,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:43,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:43,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:43,517 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) [2024-06-20 15:13:43,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:43,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:43,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:44,197 INFO L124 PetriNetUnfolderBase]: 3482/6049 cut-off events. [2024-06-20 15:13:44,197 INFO L125 PetriNetUnfolderBase]: For 140633/140640 co-relation queries the response was YES. [2024-06-20 15:13:44,236 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. [2024-06-20 15:13:44,342 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 176 selfloop transitions, 19 changer transitions 0/228 dead transitions. [2024-06-20 15:13:44,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 228 transitions, 3464 flow [2024-06-20 15:13:44,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-20 15:13:44,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-20 15:13:44,344 INFO L175 Difference]: Start difference. First operand has 156 places, 216 transitions, 3022 flow. Second operand 5 states and 118 transitions. [2024-06-20 15:13:44,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 228 transitions, 3464 flow [2024-06-20 15:13:44,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 228 transitions, 3265 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:44,637 INFO L231 Difference]: Finished difference. Result has 154 places, 219 transitions, 2903 flow [2024-06-20 15:13:44,637 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} [2024-06-20 15:13:44,638 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-20 15:13:44,638 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 219 transitions, 2903 flow [2024-06-20 15:13:44,638 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) [2024-06-20 15:13:44,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:44,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:44,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:13:44,638 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)] === [2024-06-20 15:13:44,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:44,639 INFO L85 PathProgramCache]: Analyzing trace with hash -186849499, now seen corresponding path program 1 times [2024-06-20 15:13:44,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:44,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853524734] [2024-06-20 15:13:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:44,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:44,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:44,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853524734] [2024-06-20 15:13:44,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853524734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:44,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:44,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:44,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950415054] [2024-06-20 15:13:44,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:44,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:44,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:44,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:44,796 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) [2024-06-20 15:13:44,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:44,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:44,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:45,622 INFO L124 PetriNetUnfolderBase]: 3635/6275 cut-off events. [2024-06-20 15:13:45,622 INFO L125 PetriNetUnfolderBase]: For 148824/148824 co-relation queries the response was YES. [2024-06-20 15:13:45,663 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. [2024-06-20 15:13:45,688 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 216 selfloop transitions, 38 changer transitions 0/261 dead transitions. [2024-06-20 15:13:45,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 261 transitions, 3922 flow [2024-06-20 15:13:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 15:13:45,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-20 15:13:45,690 INFO L175 Difference]: Start difference. First operand has 154 places, 219 transitions, 2903 flow. Second operand 6 states and 143 transitions. [2024-06-20 15:13:45,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 261 transitions, 3922 flow [2024-06-20 15:13:46,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 261 transitions, 3858 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:46,007 INFO L231 Difference]: Finished difference. Result has 160 places, 242 transitions, 3394 flow [2024-06-20 15:13:46,008 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} [2024-06-20 15:13:46,008 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-20 15:13:46,008 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 242 transitions, 3394 flow [2024-06-20 15:13:46,008 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) [2024-06-20 15:13:46,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:46,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:46,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:13:46,009 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:46,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:46,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1423646607, now seen corresponding path program 1 times [2024-06-20 15:13:46,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:46,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422927251] [2024-06-20 15:13:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:46,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:46,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:46,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422927251] [2024-06-20 15:13:46,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422927251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:46,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:46,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:46,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626649569] [2024-06-20 15:13:46,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:46,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:46,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:46,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:46,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:46,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:46,157 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) [2024-06-20 15:13:46,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:46,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:46,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:46,980 INFO L124 PetriNetUnfolderBase]: 3642/6291 cut-off events. [2024-06-20 15:13:46,980 INFO L125 PetriNetUnfolderBase]: For 161386/161393 co-relation queries the response was YES. [2024-06-20 15:13:47,019 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. [2024-06-20 15:13:47,040 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 219 selfloop transitions, 40 changer transitions 2/268 dead transitions. [2024-06-20 15:13:47,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 268 transitions, 4133 flow [2024-06-20 15:13:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-20 15:13:47,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-20 15:13:47,041 INFO L175 Difference]: Start difference. First operand has 160 places, 242 transitions, 3394 flow. Second operand 7 states and 159 transitions. [2024-06-20 15:13:47,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 268 transitions, 4133 flow [2024-06-20 15:13:47,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 268 transitions, 4069 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:47,523 INFO L231 Difference]: Finished difference. Result has 168 places, 251 transitions, 3580 flow [2024-06-20 15:13:47,524 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} [2024-06-20 15:13:47,524 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-20 15:13:47,524 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 251 transitions, 3580 flow [2024-06-20 15:13:47,524 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) [2024-06-20 15:13:47,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:47,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:47,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:13:47,525 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:47,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:47,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1106322029, now seen corresponding path program 2 times [2024-06-20 15:13:47,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:47,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383984771] [2024-06-20 15:13:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:47,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:47,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:47,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383984771] [2024-06-20 15:13:47,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383984771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:47,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:47,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:47,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965339787] [2024-06-20 15:13:47,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:47,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:47,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:47,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:47,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:47,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:47,655 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) [2024-06-20 15:13:47,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:47,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:47,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:48,466 INFO L124 PetriNetUnfolderBase]: 3645/6301 cut-off events. [2024-06-20 15:13:48,467 INFO L125 PetriNetUnfolderBase]: For 170525/170535 co-relation queries the response was YES. [2024-06-20 15:13:48,510 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. [2024-06-20 15:13:48,532 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 187 selfloop transitions, 77 changer transitions 1/272 dead transitions. [2024-06-20 15:13:48,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 272 transitions, 4343 flow [2024-06-20 15:13:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 15:13:48,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-20 15:13:48,533 INFO L175 Difference]: Start difference. First operand has 168 places, 251 transitions, 3580 flow. Second operand 6 states and 143 transitions. [2024-06-20 15:13:48,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 272 transitions, 4343 flow [2024-06-20 15:13:48,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 272 transitions, 4235 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:48,982 INFO L231 Difference]: Finished difference. Result has 171 places, 256 transitions, 3731 flow [2024-06-20 15:13:48,983 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} [2024-06-20 15:13:48,983 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-20 15:13:48,983 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 256 transitions, 3731 flow [2024-06-20 15:13:48,983 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) [2024-06-20 15:13:48,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:48,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:48,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:13:48,984 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:48,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:48,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1106084879, now seen corresponding path program 3 times [2024-06-20 15:13:48,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:48,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84418240] [2024-06-20 15:13:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:48,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:49,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:49,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84418240] [2024-06-20 15:13:49,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84418240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:49,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:49,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:49,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494007913] [2024-06-20 15:13:49,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:49,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:49,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:49,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:49,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:49,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:49,136 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) [2024-06-20 15:13:49,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:49,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:49,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:49,919 INFO L124 PetriNetUnfolderBase]: 3540/6097 cut-off events. [2024-06-20 15:13:49,919 INFO L125 PetriNetUnfolderBase]: For 174386/174393 co-relation queries the response was YES. [2024-06-20 15:13:49,963 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. [2024-06-20 15:13:49,985 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 186 selfloop transitions, 76 changer transitions 5/274 dead transitions. [2024-06-20 15:13:49,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 274 transitions, 4326 flow [2024-06-20 15:13:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:49,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:13:49,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-20 15:13:49,987 INFO L175 Difference]: Start difference. First operand has 171 places, 256 transitions, 3731 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:13:49,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 274 transitions, 4326 flow [2024-06-20 15:13:50,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 274 transitions, 4190 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:50,582 INFO L231 Difference]: Finished difference. Result has 175 places, 251 transitions, 3689 flow [2024-06-20 15:13:50,582 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} [2024-06-20 15:13:50,583 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-20 15:13:50,583 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 251 transitions, 3689 flow [2024-06-20 15:13:50,583 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) [2024-06-20 15:13:50,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:50,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:50,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:13:50,584 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:50,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1106330957, now seen corresponding path program 1 times [2024-06-20 15:13:50,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:50,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643680857] [2024-06-20 15:13:50,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:50,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:50,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:50,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643680857] [2024-06-20 15:13:50,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643680857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:50,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:50,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:50,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985812416] [2024-06-20 15:13:50,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:50,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:50,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:50,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:50,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:50,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:50,822 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) [2024-06-20 15:13:50,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:50,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:50,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:51,508 INFO L124 PetriNetUnfolderBase]: 3225/5582 cut-off events. [2024-06-20 15:13:51,509 INFO L125 PetriNetUnfolderBase]: For 182284/182295 co-relation queries the response was YES. [2024-06-20 15:13:51,547 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. [2024-06-20 15:13:51,567 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 207 selfloop transitions, 22 changer transitions 0/266 dead transitions. [2024-06-20 15:13:51,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 266 transitions, 4221 flow [2024-06-20 15:13:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-20 15:13:51,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-20 15:13:51,569 INFO L175 Difference]: Start difference. First operand has 175 places, 251 transitions, 3689 flow. Second operand 5 states and 121 transitions. [2024-06-20 15:13:51,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 266 transitions, 4221 flow [2024-06-20 15:13:52,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 266 transitions, 4029 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 15:13:52,091 INFO L231 Difference]: Finished difference. Result has 173 places, 253 transitions, 3578 flow [2024-06-20 15:13:52,091 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} [2024-06-20 15:13:52,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-20 15:13:52,092 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 253 transitions, 3578 flow [2024-06-20 15:13:52,092 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) [2024-06-20 15:13:52,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:52,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:52,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:13:52,092 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:52,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:52,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1187095605, now seen corresponding path program 1 times [2024-06-20 15:13:52,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:52,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026138779] [2024-06-20 15:13:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:52,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:52,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:52,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026138779] [2024-06-20 15:13:52,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026138779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:52,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:52,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:52,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741921029] [2024-06-20 15:13:52,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:52,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:52,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:52,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:52,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:52,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:52,229 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) [2024-06-20 15:13:52,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:52,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:52,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:52,969 INFO L124 PetriNetUnfolderBase]: 3343/5737 cut-off events. [2024-06-20 15:13:52,969 INFO L125 PetriNetUnfolderBase]: For 171578/171578 co-relation queries the response was YES. [2024-06-20 15:13:53,010 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. [2024-06-20 15:13:53,031 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 225 selfloop transitions, 42 changer transitions 0/274 dead transitions. [2024-06-20 15:13:53,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 274 transitions, 4215 flow [2024-06-20 15:13:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 15:13:53,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:13:53,032 INFO L175 Difference]: Start difference. First operand has 173 places, 253 transitions, 3578 flow. Second operand 7 states and 160 transitions. [2024-06-20 15:13:53,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 274 transitions, 4215 flow [2024-06-20 15:13:53,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 274 transitions, 4140 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:53,629 INFO L231 Difference]: Finished difference. Result has 177 places, 254 transitions, 3614 flow [2024-06-20 15:13:53,630 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} [2024-06-20 15:13:53,630 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-20 15:13:53,630 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 254 transitions, 3614 flow [2024-06-20 15:13:53,630 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) [2024-06-20 15:13:53,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:53,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:53,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:13:53,631 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:53,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1697775988, now seen corresponding path program 1 times [2024-06-20 15:13:53,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:53,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062474652] [2024-06-20 15:13:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:53,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:53,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:53,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062474652] [2024-06-20 15:13:53,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062474652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:53,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:53,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:53,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905410838] [2024-06-20 15:13:53,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:53,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:53,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:53,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:53,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:53,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:53,787 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) [2024-06-20 15:13:53,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:53,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:53,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:54,518 INFO L124 PetriNetUnfolderBase]: 3356/5761 cut-off events. [2024-06-20 15:13:54,518 INFO L125 PetriNetUnfolderBase]: For 180560/180567 co-relation queries the response was YES. [2024-06-20 15:13:54,556 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. [2024-06-20 15:13:54,575 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 183 selfloop transitions, 89 changer transitions 0/279 dead transitions. [2024-06-20 15:13:54,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 279 transitions, 4378 flow [2024-06-20 15:13:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:13:54,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 15:13:54,577 INFO L175 Difference]: Start difference. First operand has 177 places, 254 transitions, 3614 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:13:54,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 279 transitions, 4378 flow [2024-06-20 15:13:55,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 279 transitions, 4258 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:55,086 INFO L231 Difference]: Finished difference. Result has 181 places, 260 transitions, 3836 flow [2024-06-20 15:13:55,086 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} [2024-06-20 15:13:55,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-20 15:13:55,086 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 260 transitions, 3836 flow [2024-06-20 15:13:55,087 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) [2024-06-20 15:13:55,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:55,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:55,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:13:55,087 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:55,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:55,087 INFO L85 PathProgramCache]: Analyzing trace with hash 814851012, now seen corresponding path program 2 times [2024-06-20 15:13:55,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:55,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560576093] [2024-06-20 15:13:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:55,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:55,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:55,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560576093] [2024-06-20 15:13:55,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560576093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:55,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:55,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:55,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071678064] [2024-06-20 15:13:55,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:55,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:55,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:55,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:55,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:55,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:55,256 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) [2024-06-20 15:13:55,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:55,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:55,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:55,996 INFO L124 PetriNetUnfolderBase]: 3377/5796 cut-off events. [2024-06-20 15:13:55,996 INFO L125 PetriNetUnfolderBase]: For 186766/186773 co-relation queries the response was YES. [2024-06-20 15:13:56,036 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. [2024-06-20 15:13:56,056 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 195 selfloop transitions, 98 changer transitions 0/300 dead transitions. [2024-06-20 15:13:56,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 300 transitions, 4980 flow [2024-06-20 15:13:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:13:56,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:13:56,057 INFO L175 Difference]: Start difference. First operand has 181 places, 260 transitions, 3836 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:13:56,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 300 transitions, 4980 flow [2024-06-20 15:13:56,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 300 transitions, 4835 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:56,776 INFO L231 Difference]: Finished difference. Result has 186 places, 277 transitions, 4277 flow [2024-06-20 15:13:56,777 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} [2024-06-20 15:13:56,777 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-20 15:13:56,777 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 277 transitions, 4277 flow [2024-06-20 15:13:56,777 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) [2024-06-20 15:13:56,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:56,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:56,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:13:56,778 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:56,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:56,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1854729140, now seen corresponding path program 3 times [2024-06-20 15:13:56,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:56,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457475380] [2024-06-20 15:13:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:56,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:56,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:56,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457475380] [2024-06-20 15:13:56,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457475380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:56,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:56,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:56,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171628386] [2024-06-20 15:13:56,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:56,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:56,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:56,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:56,946 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) [2024-06-20 15:13:56,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:56,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:56,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:57,831 INFO L124 PetriNetUnfolderBase]: 3382/5802 cut-off events. [2024-06-20 15:13:57,831 INFO L125 PetriNetUnfolderBase]: For 192689/192696 co-relation queries the response was YES. [2024-06-20 15:13:57,872 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. [2024-06-20 15:13:57,894 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 191 selfloop transitions, 101 changer transitions 0/299 dead transitions. [2024-06-20 15:13:57,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 299 transitions, 5124 flow [2024-06-20 15:13:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:13:57,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:13:57,896 INFO L175 Difference]: Start difference. First operand has 186 places, 277 transitions, 4277 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:13:57,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 299 transitions, 5124 flow [2024-06-20 15:13:58,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 299 transitions, 4986 flow, removed 69 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:58,474 INFO L231 Difference]: Finished difference. Result has 193 places, 280 transitions, 4424 flow [2024-06-20 15:13:58,474 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} [2024-06-20 15:13:58,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-20 15:13:58,475 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 280 transitions, 4424 flow [2024-06-20 15:13:58,475 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) [2024-06-20 15:13:58,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:58,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:58,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:13:58,475 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)] === [2024-06-20 15:13:58,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:58,476 INFO L85 PathProgramCache]: Analyzing trace with hash 941570022, now seen corresponding path program 4 times [2024-06-20 15:13:58,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:58,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417622013] [2024-06-20 15:13:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:58,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:58,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:58,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417622013] [2024-06-20 15:13:58,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417622013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:58,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:58,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:58,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857709843] [2024-06-20 15:13:58,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:58,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:58,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:58,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:58,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:58,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:58,626 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) [2024-06-20 15:13:58,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:58,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:58,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:59,553 INFO L124 PetriNetUnfolderBase]: 3416/5850 cut-off events. [2024-06-20 15:13:59,553 INFO L125 PetriNetUnfolderBase]: For 199446/199453 co-relation queries the response was YES. [2024-06-20 15:13:59,600 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. [2024-06-20 15:13:59,624 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 50 changer transitions 0/308 dead transitions. [2024-06-20 15:13:59,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 308 transitions, 5413 flow [2024-06-20 15:13:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:59,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:13:59,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:13:59,625 INFO L175 Difference]: Start difference. First operand has 193 places, 280 transitions, 4424 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:13:59,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 308 transitions, 5413 flow [2024-06-20 15:14:00,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 308 transitions, 5202 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:00,268 INFO L231 Difference]: Finished difference. Result has 199 places, 291 transitions, 4573 flow [2024-06-20 15:14:00,269 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} [2024-06-20 15:14:00,269 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-20 15:14:00,269 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 291 transitions, 4573 flow [2024-06-20 15:14:00,269 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) [2024-06-20 15:14:00,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:00,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:00,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:14:00,270 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)] === [2024-06-20 15:14:00,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:00,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1970199056, now seen corresponding path program 1 times [2024-06-20 15:14:00,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:00,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43244973] [2024-06-20 15:14:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:00,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:00,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:00,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43244973] [2024-06-20 15:14:00,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43244973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:00,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:00,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:00,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086760214] [2024-06-20 15:14:00,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:00,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:00,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:00,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:00,429 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) [2024-06-20 15:14:00,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:00,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:00,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:01,361 INFO L124 PetriNetUnfolderBase]: 3418/5851 cut-off events. [2024-06-20 15:14:01,361 INFO L125 PetriNetUnfolderBase]: For 207560/207567 co-relation queries the response was YES. [2024-06-20 15:14:01,405 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. [2024-06-20 15:14:01,424 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 53 changer transitions 0/311 dead transitions. [2024-06-20 15:14:01,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 311 transitions, 5431 flow [2024-06-20 15:14:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:14:01,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:14:01,426 INFO L175 Difference]: Start difference. First operand has 199 places, 291 transitions, 4573 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:14:01,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 311 transitions, 5431 flow [2024-06-20 15:14:02,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 311 transitions, 5305 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:02,020 INFO L231 Difference]: Finished difference. Result has 203 places, 294 transitions, 4622 flow [2024-06-20 15:14:02,020 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} [2024-06-20 15:14:02,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-20 15:14:02,021 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 294 transitions, 4622 flow [2024-06-20 15:14:02,021 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) [2024-06-20 15:14:02,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:02,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:02,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:14:02,022 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)] === [2024-06-20 15:14:02,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:02,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1976398580, now seen corresponding path program 2 times [2024-06-20 15:14:02,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:02,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353320502] [2024-06-20 15:14:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:02,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:02,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:02,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353320502] [2024-06-20 15:14:02,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353320502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:02,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:02,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:02,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814300618] [2024-06-20 15:14:02,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:02,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:02,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:02,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:02,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:02,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:02,172 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) [2024-06-20 15:14:02,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:02,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:02,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:02,979 INFO L124 PetriNetUnfolderBase]: 3439/5886 cut-off events. [2024-06-20 15:14:02,979 INFO L125 PetriNetUnfolderBase]: For 219113/219123 co-relation queries the response was YES. [2024-06-20 15:14:03,022 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. [2024-06-20 15:14:03,043 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 209 selfloop transitions, 104 changer transitions 0/320 dead transitions. [2024-06-20 15:14:03,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 320 transitions, 5695 flow [2024-06-20 15:14:03,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 15:14:03,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-20 15:14:03,044 INFO L175 Difference]: Start difference. First operand has 203 places, 294 transitions, 4622 flow. Second operand 7 states and 163 transitions. [2024-06-20 15:14:03,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 320 transitions, 5695 flow [2024-06-20 15:14:03,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 320 transitions, 5545 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:03,743 INFO L231 Difference]: Finished difference. Result has 205 places, 303 transitions, 4915 flow [2024-06-20 15:14:03,743 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} [2024-06-20 15:14:03,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-20 15:14:03,744 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 303 transitions, 4915 flow [2024-06-20 15:14:03,744 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) [2024-06-20 15:14:03,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:03,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:03,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:14:03,744 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)] === [2024-06-20 15:14:03,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:03,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2090488820, now seen corresponding path program 5 times [2024-06-20 15:14:03,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:03,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556280269] [2024-06-20 15:14:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:03,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:03,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:03,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556280269] [2024-06-20 15:14:03,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556280269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:03,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:03,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:03,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396321490] [2024-06-20 15:14:03,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:03,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:03,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:03,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:03,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:03,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:03,902 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) [2024-06-20 15:14:03,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:03,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:03,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:04,737 INFO L124 PetriNetUnfolderBase]: 3433/5877 cut-off events. [2024-06-20 15:14:04,737 INFO L125 PetriNetUnfolderBase]: For 227784/227791 co-relation queries the response was YES. [2024-06-20 15:14:04,780 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. [2024-06-20 15:14:04,800 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 209 selfloop transitions, 110 changer transitions 0/326 dead transitions. [2024-06-20 15:14:04,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 326 transitions, 5765 flow [2024-06-20 15:14:04,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:04,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:14:04,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:14:04,801 INFO L175 Difference]: Start difference. First operand has 205 places, 303 transitions, 4915 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:14:04,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 326 transitions, 5765 flow [2024-06-20 15:14:05,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 326 transitions, 5595 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:05,536 INFO L231 Difference]: Finished difference. Result has 211 places, 303 transitions, 4981 flow [2024-06-20 15:14:05,536 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} [2024-06-20 15:14:05,537 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-20 15:14:05,537 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 303 transitions, 4981 flow [2024-06-20 15:14:05,537 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) [2024-06-20 15:14:05,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:05,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:05,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:14:05,538 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)] === [2024-06-20 15:14:05,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:05,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2090667566, now seen corresponding path program 3 times [2024-06-20 15:14:05,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:05,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4094776] [2024-06-20 15:14:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:05,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:05,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:05,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4094776] [2024-06-20 15:14:05,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4094776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:05,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:05,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:05,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114365573] [2024-06-20 15:14:05,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:05,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:05,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:05,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:05,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:05,742 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) [2024-06-20 15:14:05,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:05,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:05,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:06,587 INFO L124 PetriNetUnfolderBase]: 3435/5881 cut-off events. [2024-06-20 15:14:06,588 INFO L125 PetriNetUnfolderBase]: For 236734/236741 co-relation queries the response was YES. [2024-06-20 15:14:06,632 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. [2024-06-20 15:14:06,652 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 210 selfloop transitions, 109 changer transitions 0/326 dead transitions. [2024-06-20 15:14:06,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 326 transitions, 5901 flow [2024-06-20 15:14:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:14:06,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-20 15:14:06,654 INFO L175 Difference]: Start difference. First operand has 211 places, 303 transitions, 4981 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:14:06,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 326 transitions, 5901 flow [2024-06-20 15:14:07,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 326 transitions, 5652 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:07,561 INFO L231 Difference]: Finished difference. Result has 212 places, 306 transitions, 5040 flow [2024-06-20 15:14:07,561 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} [2024-06-20 15:14:07,561 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-20 15:14:07,562 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 306 transitions, 5040 flow [2024-06-20 15:14:07,562 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) [2024-06-20 15:14:07,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:07,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:07,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:14:07,562 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)] === [2024-06-20 15:14:07,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:07,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1982112500, now seen corresponding path program 4 times [2024-06-20 15:14:07,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:07,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501327323] [2024-06-20 15:14:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:07,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:07,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:07,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501327323] [2024-06-20 15:14:07,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501327323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:07,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:07,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:07,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641303516] [2024-06-20 15:14:07,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:07,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:07,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:07,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:07,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:07,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:07,715 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) [2024-06-20 15:14:07,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:07,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:07,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:08,612 INFO L124 PetriNetUnfolderBase]: 3432/5876 cut-off events. [2024-06-20 15:14:08,612 INFO L125 PetriNetUnfolderBase]: For 236218/236228 co-relation queries the response was YES. [2024-06-20 15:14:08,649 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. [2024-06-20 15:14:08,667 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 207 selfloop transitions, 108 changer transitions 0/322 dead transitions. [2024-06-20 15:14:08,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 322 transitions, 5868 flow [2024-06-20 15:14:08,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:08,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 15:14:08,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-20 15:14:08,668 INFO L175 Difference]: Start difference. First operand has 212 places, 306 transitions, 5040 flow. Second operand 7 states and 163 transitions. [2024-06-20 15:14:08,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 322 transitions, 5868 flow [2024-06-20 15:14:09,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 322 transitions, 5517 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:09,327 INFO L231 Difference]: Finished difference. Result has 211 places, 306 transitions, 4915 flow [2024-06-20 15:14:09,328 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} [2024-06-20 15:14:09,328 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-20 15:14:09,328 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 306 transitions, 4915 flow [2024-06-20 15:14:09,328 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) [2024-06-20 15:14:09,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:09,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:09,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:14:09,329 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)] === [2024-06-20 15:14:09,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1982103572, now seen corresponding path program 1 times [2024-06-20 15:14:09,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:09,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566359434] [2024-06-20 15:14:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:09,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:09,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:09,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566359434] [2024-06-20 15:14:09,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566359434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:09,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:09,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:09,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167494154] [2024-06-20 15:14:09,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:09,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:09,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:09,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:09,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:09,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:09,489 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) [2024-06-20 15:14:09,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:09,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:09,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:10,311 INFO L124 PetriNetUnfolderBase]: 3342/5762 cut-off events. [2024-06-20 15:14:10,311 INFO L125 PetriNetUnfolderBase]: For 240523/240528 co-relation queries the response was YES. [2024-06-20 15:14:10,353 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. [2024-06-20 15:14:10,372 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 243 selfloop transitions, 25 changer transitions 0/321 dead transitions. [2024-06-20 15:14:10,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 321 transitions, 5519 flow [2024-06-20 15:14:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 15:14:10,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-20 15:14:10,374 INFO L175 Difference]: Start difference. First operand has 211 places, 306 transitions, 4915 flow. Second operand 6 states and 139 transitions. [2024-06-20 15:14:10,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 321 transitions, 5519 flow [2024-06-20 15:14:11,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 321 transitions, 5286 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:11,049 INFO L231 Difference]: Finished difference. Result has 212 places, 307 transitions, 4756 flow [2024-06-20 15:14:11,049 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} [2024-06-20 15:14:11,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-20 15:14:11,050 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 307 transitions, 4756 flow [2024-06-20 15:14:11,050 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) [2024-06-20 15:14:11,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:11,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:11,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:14:11,050 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:11,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:11,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1967818772, now seen corresponding path program 2 times [2024-06-20 15:14:11,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:11,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810750187] [2024-06-20 15:14:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:11,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:11,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810750187] [2024-06-20 15:14:11,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810750187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:11,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:11,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:11,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163169224] [2024-06-20 15:14:11,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:11,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:11,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:11,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:11,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:11,233 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) [2024-06-20 15:14:11,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:11,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:11,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:12,038 INFO L124 PetriNetUnfolderBase]: 3351/5778 cut-off events. [2024-06-20 15:14:12,038 INFO L125 PetriNetUnfolderBase]: For 245262/245267 co-relation queries the response was YES. [2024-06-20 15:14:12,081 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. [2024-06-20 15:14:12,101 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 244 selfloop transitions, 28 changer transitions 0/325 dead transitions. [2024-06-20 15:14:12,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 325 transitions, 5388 flow [2024-06-20 15:14:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 15:14:12,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:14:12,102 INFO L175 Difference]: Start difference. First operand has 212 places, 307 transitions, 4756 flow. Second operand 6 states and 141 transitions. [2024-06-20 15:14:12,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 325 transitions, 5388 flow [2024-06-20 15:14:12,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 325 transitions, 5330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:12,933 INFO L231 Difference]: Finished difference. Result has 214 places, 308 transitions, 4778 flow [2024-06-20 15:14:12,934 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} [2024-06-20 15:14:12,934 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-20 15:14:12,934 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 308 transitions, 4778 flow [2024-06-20 15:14:12,934 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) [2024-06-20 15:14:12,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:12,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:12,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:14:12,935 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:12,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:12,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1851881108, now seen corresponding path program 1 times [2024-06-20 15:14:12,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:12,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630697516] [2024-06-20 15:14:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:12,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:13,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:13,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630697516] [2024-06-20 15:14:13,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630697516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:13,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:13,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:13,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94314542] [2024-06-20 15:14:13,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:13,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:13,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:13,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:13,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:13,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:13,085 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) [2024-06-20 15:14:13,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:13,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:13,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:13,915 INFO L124 PetriNetUnfolderBase]: 3478/5955 cut-off events. [2024-06-20 15:14:13,915 INFO L125 PetriNetUnfolderBase]: For 252291/252291 co-relation queries the response was YES. [2024-06-20 15:14:13,958 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. [2024-06-20 15:14:13,977 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 285 selfloop transitions, 51 changer transitions 0/343 dead transitions. [2024-06-20 15:14:13,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 343 transitions, 5808 flow [2024-06-20 15:14:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:14:13,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:14:13,978 INFO L175 Difference]: Start difference. First operand has 214 places, 308 transitions, 4778 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:14:13,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 343 transitions, 5808 flow [2024-06-20 15:14:14,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 343 transitions, 5740 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:14,742 INFO L231 Difference]: Finished difference. Result has 218 places, 314 transitions, 4977 flow [2024-06-20 15:14:14,742 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} [2024-06-20 15:14:14,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-20 15:14:14,743 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 314 transitions, 4977 flow [2024-06-20 15:14:14,743 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) [2024-06-20 15:14:14,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:14,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:14,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:14:14,743 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:14,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:14,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1851941558, now seen corresponding path program 2 times [2024-06-20 15:14:14,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:14,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537287887] [2024-06-20 15:14:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:14,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:14,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:14,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537287887] [2024-06-20 15:14:14,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537287887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:14,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:14,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:14,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848978303] [2024-06-20 15:14:14,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:14,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:14,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:14,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:14,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:14,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:14,887 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) [2024-06-20 15:14:14,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:14,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:14,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:15,762 INFO L124 PetriNetUnfolderBase]: 3473/5946 cut-off events. [2024-06-20 15:14:15,762 INFO L125 PetriNetUnfolderBase]: For 261458/261458 co-relation queries the response was YES. [2024-06-20 15:14:15,810 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. [2024-06-20 15:14:15,831 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 284 selfloop transitions, 44 changer transitions 0/335 dead transitions. [2024-06-20 15:14:15,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 335 transitions, 5729 flow [2024-06-20 15:14:15,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 15:14:15,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:14:15,832 INFO L175 Difference]: Start difference. First operand has 218 places, 314 transitions, 4977 flow. Second operand 7 states and 160 transitions. [2024-06-20 15:14:15,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 335 transitions, 5729 flow [2024-06-20 15:14:16,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 335 transitions, 5584 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:16,743 INFO L231 Difference]: Finished difference. Result has 222 places, 314 transitions, 4925 flow [2024-06-20 15:14:16,744 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} [2024-06-20 15:14:16,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-20 15:14:16,744 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 314 transitions, 4925 flow [2024-06-20 15:14:16,744 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) [2024-06-20 15:14:16,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:16,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:16,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:14:16,745 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)] === [2024-06-20 15:14:16,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash 941763648, now seen corresponding path program 1 times [2024-06-20 15:14:16,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:16,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801946071] [2024-06-20 15:14:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:16,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:16,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:16,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801946071] [2024-06-20 15:14:16,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801946071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:16,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:16,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:16,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839790647] [2024-06-20 15:14:16,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:16,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:16,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:16,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:16,923 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) [2024-06-20 15:14:16,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:16,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:16,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:17,803 INFO L124 PetriNetUnfolderBase]: 3532/6041 cut-off events. [2024-06-20 15:14:17,803 INFO L125 PetriNetUnfolderBase]: For 288268/288275 co-relation queries the response was YES. [2024-06-20 15:14:17,850 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. [2024-06-20 15:14:17,870 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 286 selfloop transitions, 43 changer transitions 0/336 dead transitions. [2024-06-20 15:14:17,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 5709 flow [2024-06-20 15:14:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 15:14:17,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-20 15:14:17,871 INFO L175 Difference]: Start difference. First operand has 222 places, 314 transitions, 4925 flow. Second operand 8 states and 181 transitions. [2024-06-20 15:14:17,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 5709 flow [2024-06-20 15:14:18,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 336 transitions, 5608 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:18,893 INFO L231 Difference]: Finished difference. Result has 225 places, 317 transitions, 4985 flow [2024-06-20 15:14:18,893 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} [2024-06-20 15:14:18,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-20 15:14:18,894 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 317 transitions, 4985 flow [2024-06-20 15:14:18,894 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) [2024-06-20 15:14:18,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:18,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:18,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:14:18,895 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)] === [2024-06-20 15:14:18,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:18,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2090682446, now seen corresponding path program 2 times [2024-06-20 15:14:18,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:18,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763569094] [2024-06-20 15:14:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:18,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:19,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:19,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763569094] [2024-06-20 15:14:19,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763569094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:19,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:19,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242734708] [2024-06-20 15:14:19,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:19,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:19,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:19,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:19,039 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) [2024-06-20 15:14:19,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:19,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:19,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:19,975 INFO L124 PetriNetUnfolderBase]: 3614/6179 cut-off events. [2024-06-20 15:14:19,975 INFO L125 PetriNetUnfolderBase]: For 307745/307752 co-relation queries the response was YES. [2024-06-20 15:14:20,136 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. [2024-06-20 15:14:20,154 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 253 selfloop transitions, 84 changer transitions 0/344 dead transitions. [2024-06-20 15:14:20,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 344 transitions, 5821 flow [2024-06-20 15:14:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:14:20,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:14:20,155 INFO L175 Difference]: Start difference. First operand has 225 places, 317 transitions, 4985 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:14:20,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 344 transitions, 5821 flow [2024-06-20 15:14:21,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 344 transitions, 5696 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:21,226 INFO L231 Difference]: Finished difference. Result has 227 places, 322 transitions, 5146 flow [2024-06-20 15:14:21,226 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} [2024-06-20 15:14:21,227 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-20 15:14:21,227 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 322 transitions, 5146 flow [2024-06-20 15:14:21,227 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) [2024-06-20 15:14:21,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:21,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:21,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:14:21,228 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)] === [2024-06-20 15:14:21,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:21,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1968109490, now seen corresponding path program 3 times [2024-06-20 15:14:21,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:21,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408941445] [2024-06-20 15:14:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:21,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:21,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:21,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408941445] [2024-06-20 15:14:21,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408941445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:21,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:21,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:21,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552247713] [2024-06-20 15:14:21,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:21,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:21,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:21,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:21,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:21,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:21,369 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) [2024-06-20 15:14:21,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:21,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:21,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:22,280 INFO L124 PetriNetUnfolderBase]: 3590/6134 cut-off events. [2024-06-20 15:14:22,280 INFO L125 PetriNetUnfolderBase]: For 290188/290198 co-relation queries the response was YES. [2024-06-20 15:14:22,329 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. [2024-06-20 15:14:22,351 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 257 selfloop transitions, 76 changer transitions 0/340 dead transitions. [2024-06-20 15:14:22,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 340 transitions, 5898 flow [2024-06-20 15:14:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 15:14:22,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:14:22,352 INFO L175 Difference]: Start difference. First operand has 227 places, 322 transitions, 5146 flow. Second operand 7 states and 161 transitions. [2024-06-20 15:14:22,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 340 transitions, 5898 flow [2024-06-20 15:14:23,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 340 transitions, 5711 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:23,328 INFO L231 Difference]: Finished difference. Result has 229 places, 325 transitions, 5174 flow [2024-06-20 15:14:23,328 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} [2024-06-20 15:14:23,328 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-20 15:14:23,329 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 325 transitions, 5174 flow [2024-06-20 15:14:23,329 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) [2024-06-20 15:14:23,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:23,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:23,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:14:23,329 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)] === [2024-06-20 15:14:23,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1967812820, now seen corresponding path program 4 times [2024-06-20 15:14:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:23,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155140796] [2024-06-20 15:14:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:23,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:23,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:23,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155140796] [2024-06-20 15:14:23,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155140796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:23,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:23,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:23,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942289988] [2024-06-20 15:14:23,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:23,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:23,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:23,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:23,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:23,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:23,474 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) [2024-06-20 15:14:23,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:23,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:23,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:24,386 INFO L124 PetriNetUnfolderBase]: 3566/6094 cut-off events. [2024-06-20 15:14:24,387 INFO L125 PetriNetUnfolderBase]: For 295299/295309 co-relation queries the response was YES. [2024-06-20 15:14:24,433 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. [2024-06-20 15:14:24,453 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 88 changer transitions 0/346 dead transitions. [2024-06-20 15:14:24,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 346 transitions, 5942 flow [2024-06-20 15:14:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 15:14:24,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-20 15:14:24,454 INFO L175 Difference]: Start difference. First operand has 229 places, 325 transitions, 5174 flow. Second operand 7 states and 165 transitions. [2024-06-20 15:14:24,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 346 transitions, 5942 flow [2024-06-20 15:14:25,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 346 transitions, 5774 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:25,469 INFO L231 Difference]: Finished difference. Result has 233 places, 327 transitions, 5244 flow [2024-06-20 15:14:25,470 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} [2024-06-20 15:14:25,470 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-20 15:14:25,470 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 327 transitions, 5244 flow [2024-06-20 15:14:25,471 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) [2024-06-20 15:14:25,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:25,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:25,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:14:25,471 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)] === [2024-06-20 15:14:25,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:25,471 INFO L85 PathProgramCache]: Analyzing trace with hash -871962364, now seen corresponding path program 1 times [2024-06-20 15:14:25,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:25,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072861693] [2024-06-20 15:14:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:25,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:25,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:25,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072861693] [2024-06-20 15:14:25,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072861693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:25,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:25,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:25,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784689346] [2024-06-20 15:14:25,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:25,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:25,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:25,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:25,636 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) [2024-06-20 15:14:25,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:25,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:25,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:26,669 INFO L124 PetriNetUnfolderBase]: 3610/6161 cut-off events. [2024-06-20 15:14:26,669 INFO L125 PetriNetUnfolderBase]: For 307292/307296 co-relation queries the response was YES. [2024-06-20 15:14:26,709 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. [2024-06-20 15:14:26,728 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 113 changer transitions 0/368 dead transitions. [2024-06-20 15:14:26,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 368 transitions, 6644 flow [2024-06-20 15:14:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:14:26,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:14:26,729 INFO L175 Difference]: Start difference. First operand has 233 places, 327 transitions, 5244 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:14:26,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 368 transitions, 6644 flow [2024-06-20 15:14:27,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 368 transitions, 6450 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:27,719 INFO L231 Difference]: Finished difference. Result has 238 places, 347 transitions, 5845 flow [2024-06-20 15:14:27,719 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} [2024-06-20 15:14:27,720 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-20 15:14:27,720 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 347 transitions, 5845 flow [2024-06-20 15:14:27,720 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) [2024-06-20 15:14:27,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:27,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:27,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:14:27,720 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)] === [2024-06-20 15:14:27,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2135512350, now seen corresponding path program 2 times [2024-06-20 15:14:27,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:27,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106583138] [2024-06-20 15:14:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:27,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:27,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:27,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106583138] [2024-06-20 15:14:27,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106583138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:27,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:27,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:27,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239855276] [2024-06-20 15:14:27,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:27,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:27,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:27,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:27,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:27,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:27,900 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) [2024-06-20 15:14:27,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:27,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:27,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:28,861 INFO L124 PetriNetUnfolderBase]: 3606/6160 cut-off events. [2024-06-20 15:14:28,862 INFO L125 PetriNetUnfolderBase]: For 321770/321774 co-relation queries the response was YES. [2024-06-20 15:14:28,910 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. [2024-06-20 15:14:28,932 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 68 changer transitions 0/363 dead transitions. [2024-06-20 15:14:28,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 363 transitions, 6701 flow [2024-06-20 15:14:28,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 15:14:28,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-20 15:14:28,934 INFO L175 Difference]: Start difference. First operand has 238 places, 347 transitions, 5845 flow. Second operand 7 states and 165 transitions. [2024-06-20 15:14:28,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 363 transitions, 6701 flow [2024-06-20 15:14:30,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 363 transitions, 6513 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:30,047 INFO L231 Difference]: Finished difference. Result has 241 places, 348 transitions, 5825 flow [2024-06-20 15:14:30,048 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} [2024-06-20 15:14:30,048 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-20 15:14:30,048 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 348 transitions, 5825 flow [2024-06-20 15:14:30,048 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) [2024-06-20 15:14:30,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:30,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:30,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:14:30,049 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)] === [2024-06-20 15:14:30,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:30,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2135512536, now seen corresponding path program 1 times [2024-06-20 15:14:30,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:30,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754388500] [2024-06-20 15:14:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:30,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:30,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:30,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754388500] [2024-06-20 15:14:30,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754388500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:30,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:30,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:30,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338207493] [2024-06-20 15:14:30,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:30,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:30,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:30,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:30,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:30,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:30,226 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) [2024-06-20 15:14:30,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:30,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:30,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:31,173 INFO L124 PetriNetUnfolderBase]: 3598/6148 cut-off events. [2024-06-20 15:14:31,173 INFO L125 PetriNetUnfolderBase]: For 330449/330453 co-relation queries the response was YES. [2024-06-20 15:14:31,223 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. [2024-06-20 15:14:31,244 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 287 selfloop transitions, 68 changer transitions 0/362 dead transitions. [2024-06-20 15:14:31,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 362 transitions, 6569 flow [2024-06-20 15:14:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:14:31,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-20 15:14:31,246 INFO L175 Difference]: Start difference. First operand has 241 places, 348 transitions, 5825 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:14:31,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 362 transitions, 6569 flow [2024-06-20 15:14:32,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 362 transitions, 6402 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:32,427 INFO L231 Difference]: Finished difference. Result has 244 places, 348 transitions, 5816 flow [2024-06-20 15:14:32,428 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} [2024-06-20 15:14:32,428 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-20 15:14:32,428 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 348 transitions, 5816 flow [2024-06-20 15:14:32,428 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) [2024-06-20 15:14:32,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:32,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:32,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:14:32,429 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:32,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:32,429 INFO L85 PathProgramCache]: Analyzing trace with hash 370276726, now seen corresponding path program 2 times [2024-06-20 15:14:32,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:32,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339682132] [2024-06-20 15:14:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:32,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:32,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:32,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339682132] [2024-06-20 15:14:32,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339682132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:32,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:32,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:32,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232776511] [2024-06-20 15:14:32,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:32,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:32,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:32,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:32,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:32,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:32,606 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) [2024-06-20 15:14:32,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:32,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:32,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:33,600 INFO L124 PetriNetUnfolderBase]: 3620/6180 cut-off events. [2024-06-20 15:14:33,600 INFO L125 PetriNetUnfolderBase]: For 342777/342781 co-relation queries the response was YES. [2024-06-20 15:14:33,648 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. [2024-06-20 15:14:33,668 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 118 changer transitions 1/378 dead transitions. [2024-06-20 15:14:33,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 378 transitions, 6927 flow [2024-06-20 15:14:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:14:33,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:14:33,669 INFO L175 Difference]: Start difference. First operand has 244 places, 348 transitions, 5816 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:14:33,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 378 transitions, 6927 flow [2024-06-20 15:14:34,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 378 transitions, 6791 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:34,961 INFO L231 Difference]: Finished difference. Result has 247 places, 358 transitions, 6235 flow [2024-06-20 15:14:34,962 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} [2024-06-20 15:14:34,962 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-20 15:14:34,962 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 358 transitions, 6235 flow [2024-06-20 15:14:34,962 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) [2024-06-20 15:14:34,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:34,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:34,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:14:34,963 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:34,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash 370513876, now seen corresponding path program 3 times [2024-06-20 15:14:34,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:34,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28254377] [2024-06-20 15:14:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:34,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:35,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:35,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28254377] [2024-06-20 15:14:35,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28254377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:35,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:35,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:35,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664861639] [2024-06-20 15:14:35,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:35,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:35,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:35,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:35,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:35,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:35,135 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) [2024-06-20 15:14:35,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:35,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:35,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:36,148 INFO L124 PetriNetUnfolderBase]: 3613/6170 cut-off events. [2024-06-20 15:14:36,148 INFO L125 PetriNetUnfolderBase]: For 352700/352704 co-relation queries the response was YES. [2024-06-20 15:14:36,202 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. [2024-06-20 15:14:36,225 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 249 selfloop transitions, 118 changer transitions 2/376 dead transitions. [2024-06-20 15:14:36,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 376 transitions, 7036 flow [2024-06-20 15:14:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:14:36,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-20 15:14:36,226 INFO L175 Difference]: Start difference. First operand has 247 places, 358 transitions, 6235 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:14:36,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 376 transitions, 7036 flow [2024-06-20 15:14:37,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 376 transitions, 6930 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:37,605 INFO L231 Difference]: Finished difference. Result has 250 places, 357 transitions, 6358 flow [2024-06-20 15:14:37,605 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} [2024-06-20 15:14:37,605 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-20 15:14:37,605 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 357 transitions, 6358 flow [2024-06-20 15:14:37,606 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) [2024-06-20 15:14:37,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:37,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:37,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:14:37,606 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:37,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:37,607 INFO L85 PathProgramCache]: Analyzing trace with hash -335767544, now seen corresponding path program 1 times [2024-06-20 15:14:37,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:37,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170985510] [2024-06-20 15:14:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:37,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:37,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:37,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170985510] [2024-06-20 15:14:37,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170985510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:37,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:37,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:37,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299798898] [2024-06-20 15:14:37,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:37,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:37,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:37,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:37,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:37,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:37,780 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) [2024-06-20 15:14:37,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:37,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:37,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:38,775 INFO L124 PetriNetUnfolderBase]: 3593/6140 cut-off events. [2024-06-20 15:14:38,775 INFO L125 PetriNetUnfolderBase]: For 340431/340435 co-relation queries the response was YES. [2024-06-20 15:14:38,827 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. [2024-06-20 15:14:38,848 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 352 selfloop transitions, 17 changer transitions 0/376 dead transitions. [2024-06-20 15:14:38,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 376 transitions, 7153 flow [2024-06-20 15:14:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-20 15:14:38,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-20 15:14:38,858 INFO L175 Difference]: Start difference. First operand has 250 places, 357 transitions, 6358 flow. Second operand 6 states and 137 transitions. [2024-06-20 15:14:38,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 376 transitions, 7153 flow [2024-06-20 15:14:40,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 376 transitions, 6906 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:40,394 INFO L231 Difference]: Finished difference. Result has 250 places, 358 transitions, 6154 flow [2024-06-20 15:14:40,394 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} [2024-06-20 15:14:40,396 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-20 15:14:40,396 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 358 transitions, 6154 flow [2024-06-20 15:14:40,396 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) [2024-06-20 15:14:40,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:40,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:40,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:14:40,397 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:40,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:40,397 INFO L85 PathProgramCache]: Analyzing trace with hash 370184470, now seen corresponding path program 2 times [2024-06-20 15:14:40,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:40,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561068747] [2024-06-20 15:14:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:40,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:40,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:40,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561068747] [2024-06-20 15:14:40,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561068747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:40,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:40,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:40,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706863868] [2024-06-20 15:14:40,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:40,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:40,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:40,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:40,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:40,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:40,614 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) [2024-06-20 15:14:40,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:40,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:40,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:41,593 INFO L124 PetriNetUnfolderBase]: 3580/6121 cut-off events. [2024-06-20 15:14:41,594 INFO L125 PetriNetUnfolderBase]: For 331589/331593 co-relation queries the response was YES. [2024-06-20 15:14:41,646 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. [2024-06-20 15:14:41,667 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 341 selfloop transitions, 30 changer transitions 0/378 dead transitions. [2024-06-20 15:14:41,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 378 transitions, 6976 flow [2024-06-20 15:14:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:41,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 15:14:41,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:14:41,669 INFO L175 Difference]: Start difference. First operand has 250 places, 358 transitions, 6154 flow. Second operand 6 states and 144 transitions. [2024-06-20 15:14:41,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 378 transitions, 6976 flow [2024-06-20 15:14:42,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 378 transitions, 6899 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:42,909 INFO L231 Difference]: Finished difference. Result has 252 places, 358 transitions, 6141 flow [2024-06-20 15:14:42,909 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} [2024-06-20 15:14:42,910 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-20 15:14:42,910 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 358 transitions, 6141 flow [2024-06-20 15:14:42,910 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) [2024-06-20 15:14:42,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:42,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:42,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:14:42,911 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:42,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash -733434214, now seen corresponding path program 3 times [2024-06-20 15:14:42,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:42,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983404986] [2024-06-20 15:14:42,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:42,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:43,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:43,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983404986] [2024-06-20 15:14:43,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983404986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:43,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:43,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:43,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089336879] [2024-06-20 15:14:43,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:43,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:43,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:43,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:43,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:43,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:43,081 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) [2024-06-20 15:14:43,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:43,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:43,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:44,070 INFO L124 PetriNetUnfolderBase]: 3601/6152 cut-off events. [2024-06-20 15:14:44,071 INFO L125 PetriNetUnfolderBase]: For 339050/339054 co-relation queries the response was YES. [2024-06-20 15:14:44,124 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. [2024-06-20 15:14:44,147 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 155 changer transitions 0/396 dead transitions. [2024-06-20 15:14:44,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 396 transitions, 7371 flow [2024-06-20 15:14:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-20 15:14:44,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-20 15:14:44,149 INFO L175 Difference]: Start difference. First operand has 252 places, 358 transitions, 6141 flow. Second operand 10 states and 237 transitions. [2024-06-20 15:14:44,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 396 transitions, 7371 flow [2024-06-20 15:14:45,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 396 transitions, 7305 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:45,369 INFO L231 Difference]: Finished difference. Result has 259 places, 364 transitions, 6552 flow [2024-06-20 15:14:45,369 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} [2024-06-20 15:14:45,369 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-20 15:14:45,369 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 364 transitions, 6552 flow [2024-06-20 15:14:45,370 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) [2024-06-20 15:14:45,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:45,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:45,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:14:45,370 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:45,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash -733314058, now seen corresponding path program 4 times [2024-06-20 15:14:45,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:45,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460832813] [2024-06-20 15:14:45,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:45,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:45,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:45,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460832813] [2024-06-20 15:14:45,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460832813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:45,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:45,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:45,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594980722] [2024-06-20 15:14:45,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:45,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:45,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:45,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:45,513 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) [2024-06-20 15:14:45,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:45,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:45,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:46,546 INFO L124 PetriNetUnfolderBase]: 3626/6205 cut-off events. [2024-06-20 15:14:46,546 INFO L125 PetriNetUnfolderBase]: For 358803/358807 co-relation queries the response was YES. [2024-06-20 15:14:46,599 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. [2024-06-20 15:14:46,621 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 333 selfloop transitions, 51 changer transitions 2/393 dead transitions. [2024-06-20 15:14:46,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 393 transitions, 7512 flow [2024-06-20 15:14:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:46,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:14:46,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:14:46,623 INFO L175 Difference]: Start difference. First operand has 259 places, 364 transitions, 6552 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:14:46,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 393 transitions, 7512 flow [2024-06-20 15:14:48,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 393 transitions, 7253 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:48,209 INFO L231 Difference]: Finished difference. Result has 262 places, 373 transitions, 6542 flow [2024-06-20 15:14:48,209 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} [2024-06-20 15:14:48,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-20 15:14:48,210 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 373 transitions, 6542 flow [2024-06-20 15:14:48,210 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) [2024-06-20 15:14:48,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:48,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:48,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:14:48,210 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:48,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:48,211 INFO L85 PathProgramCache]: Analyzing trace with hash -728071834, now seen corresponding path program 4 times [2024-06-20 15:14:48,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:48,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564491480] [2024-06-20 15:14:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:48,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:48,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:48,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564491480] [2024-06-20 15:14:48,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564491480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:48,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:48,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:48,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895382095] [2024-06-20 15:14:48,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:48,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:48,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:48,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:48,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:48,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:48,377 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) [2024-06-20 15:14:48,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:48,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:48,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:49,390 INFO L124 PetriNetUnfolderBase]: 3624/6195 cut-off events. [2024-06-20 15:14:49,391 INFO L125 PetriNetUnfolderBase]: For 364027/364031 co-relation queries the response was YES. [2024-06-20 15:14:49,449 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. [2024-06-20 15:14:49,473 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 221 selfloop transitions, 175 changer transitions 0/403 dead transitions. [2024-06-20 15:14:49,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 403 transitions, 7764 flow [2024-06-20 15:14:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-20 15:14:49,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:14:49,474 INFO L175 Difference]: Start difference. First operand has 262 places, 373 transitions, 6542 flow. Second operand 9 states and 210 transitions. [2024-06-20 15:14:49,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 403 transitions, 7764 flow [2024-06-20 15:14:50,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 403 transitions, 7642 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:50,923 INFO L231 Difference]: Finished difference. Result has 266 places, 379 transitions, 6934 flow [2024-06-20 15:14:50,924 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} [2024-06-20 15:14:50,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-20 15:14:50,924 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 379 transitions, 6934 flow [2024-06-20 15:14:50,924 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) [2024-06-20 15:14:50,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:50,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:50,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:14:50,925 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:50,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:50,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2075209590, now seen corresponding path program 1 times [2024-06-20 15:14:50,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:50,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531869240] [2024-06-20 15:14:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:50,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:51,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:51,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531869240] [2024-06-20 15:14:51,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531869240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:51,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:51,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:51,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620515314] [2024-06-20 15:14:51,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:51,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:51,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:51,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:51,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:51,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:51,097 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) [2024-06-20 15:14:51,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:51,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:51,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:52,140 INFO L124 PetriNetUnfolderBase]: 3618/6194 cut-off events. [2024-06-20 15:14:52,140 INFO L125 PetriNetUnfolderBase]: For 375849/375856 co-relation queries the response was YES. [2024-06-20 15:14:52,200 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. [2024-06-20 15:14:52,224 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 288 selfloop transitions, 103 changer transitions 0/398 dead transitions. [2024-06-20 15:14:52,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 398 transitions, 7762 flow [2024-06-20 15:14:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-20 15:14:52,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 15:14:52,225 INFO L175 Difference]: Start difference. First operand has 266 places, 379 transitions, 6934 flow. Second operand 9 states and 201 transitions. [2024-06-20 15:14:52,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 398 transitions, 7762 flow [2024-06-20 15:14:53,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 398 transitions, 7516 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:53,780 INFO L231 Difference]: Finished difference. Result has 271 places, 379 transitions, 6908 flow [2024-06-20 15:14:53,781 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} [2024-06-20 15:14:53,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-20 15:14:53,782 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 379 transitions, 6908 flow [2024-06-20 15:14:53,782 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) [2024-06-20 15:14:53,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:53,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:53,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:14:53,782 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:53,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:53,782 INFO L85 PathProgramCache]: Analyzing trace with hash -727773304, now seen corresponding path program 5 times [2024-06-20 15:14:53,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:53,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489273149] [2024-06-20 15:14:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:53,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:53,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:53,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489273149] [2024-06-20 15:14:53,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489273149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:53,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:53,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:53,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105275787] [2024-06-20 15:14:53,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:53,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:53,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:53,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:53,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:53,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:53,937 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) [2024-06-20 15:14:53,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:53,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:53,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:54,994 INFO L124 PetriNetUnfolderBase]: 3615/6183 cut-off events. [2024-06-20 15:14:54,994 INFO L125 PetriNetUnfolderBase]: For 384996/385000 co-relation queries the response was YES. [2024-06-20 15:14:55,047 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. [2024-06-20 15:14:55,068 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 218 selfloop transitions, 174 changer transitions 0/399 dead transitions. [2024-06-20 15:14:55,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 399 transitions, 7852 flow [2024-06-20 15:14:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-20 15:14:55,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:14:55,070 INFO L175 Difference]: Start difference. First operand has 271 places, 379 transitions, 6908 flow. Second operand 9 states and 207 transitions. [2024-06-20 15:14:55,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 399 transitions, 7852 flow [2024-06-20 15:14:56,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 399 transitions, 7525 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-20 15:14:56,482 INFO L231 Difference]: Finished difference. Result has 271 places, 379 transitions, 6938 flow [2024-06-20 15:14:56,482 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} [2024-06-20 15:14:56,482 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-20 15:14:56,483 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 379 transitions, 6938 flow [2024-06-20 15:14:56,483 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) [2024-06-20 15:14:56,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:56,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:56,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:14:56,483 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:56,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:56,484 INFO L85 PathProgramCache]: Analyzing trace with hash -413777988, now seen corresponding path program 5 times [2024-06-20 15:14:56,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:56,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477048816] [2024-06-20 15:14:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:56,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:56,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:56,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477048816] [2024-06-20 15:14:56,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477048816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:56,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:56,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:56,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910262001] [2024-06-20 15:14:56,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:56,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:56,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:56,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:56,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:56,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:56,630 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) [2024-06-20 15:14:56,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:56,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:56,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:57,676 INFO L124 PetriNetUnfolderBase]: 3663/6271 cut-off events. [2024-06-20 15:14:57,676 INFO L125 PetriNetUnfolderBase]: For 390369/390373 co-relation queries the response was YES. [2024-06-20 15:14:57,732 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. [2024-06-20 15:14:57,754 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 313 selfloop transitions, 92 changer transitions 1/413 dead transitions. [2024-06-20 15:14:57,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 413 transitions, 8218 flow [2024-06-20 15:14:57,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:57,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 15:14:57,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:14:57,755 INFO L175 Difference]: Start difference. First operand has 271 places, 379 transitions, 6938 flow. Second operand 8 states and 184 transitions. [2024-06-20 15:14:57,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 413 transitions, 8218 flow [2024-06-20 15:14:59,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 413 transitions, 7811 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:59,313 INFO L231 Difference]: Finished difference. Result has 273 places, 396 transitions, 7111 flow [2024-06-20 15:14:59,313 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} [2024-06-20 15:14:59,313 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-20 15:14:59,313 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 396 transitions, 7111 flow [2024-06-20 15:14:59,313 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) [2024-06-20 15:14:59,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:59,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:59,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:14:59,314 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:59,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:59,314 INFO L85 PathProgramCache]: Analyzing trace with hash -413789148, now seen corresponding path program 6 times [2024-06-20 15:14:59,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:59,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146612747] [2024-06-20 15:14:59,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:59,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:59,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:59,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146612747] [2024-06-20 15:14:59,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146612747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:59,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:59,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:59,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871943112] [2024-06-20 15:14:59,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:59,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:59,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:59,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:59,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:59,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:59,491 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) [2024-06-20 15:14:59,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:59,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:59,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:00,559 INFO L124 PetriNetUnfolderBase]: 3653/6253 cut-off events. [2024-06-20 15:15:00,559 INFO L125 PetriNetUnfolderBase]: For 398402/398406 co-relation queries the response was YES. [2024-06-20 15:15:00,614 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. [2024-06-20 15:15:00,636 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 316 selfloop transitions, 87 changer transitions 2/412 dead transitions. [2024-06-20 15:15:00,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 412 transitions, 7959 flow [2024-06-20 15:15:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-20 15:15:00,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 15:15:00,638 INFO L175 Difference]: Start difference. First operand has 273 places, 396 transitions, 7111 flow. Second operand 9 states and 200 transitions. [2024-06-20 15:15:00,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 412 transitions, 7959 flow [2024-06-20 15:15:02,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 412 transitions, 7898 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-20 15:15:02,392 INFO L231 Difference]: Finished difference. Result has 281 places, 394 transitions, 7199 flow [2024-06-20 15:15:02,393 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} [2024-06-20 15:15:02,393 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-20 15:15:02,393 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 394 transitions, 7199 flow [2024-06-20 15:15:02,393 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) [2024-06-20 15:15:02,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:02,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:02,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:15:02,394 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:02,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash 705838400, now seen corresponding path program 7 times [2024-06-20 15:15:02,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:02,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014316698] [2024-06-20 15:15:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:02,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:02,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:02,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014316698] [2024-06-20 15:15:02,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014316698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:02,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:02,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:02,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523427714] [2024-06-20 15:15:02,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:02,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:02,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:02,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:02,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:02,540 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) [2024-06-20 15:15:02,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:02,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:02,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:03,606 INFO L124 PetriNetUnfolderBase]: 3651/6258 cut-off events. [2024-06-20 15:15:03,606 INFO L125 PetriNetUnfolderBase]: For 411629/411636 co-relation queries the response was YES. [2024-06-20 15:15:03,672 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. [2024-06-20 15:15:03,696 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 253 selfloop transitions, 152 changer transitions 1/413 dead transitions. [2024-06-20 15:15:03,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 413 transitions, 8343 flow [2024-06-20 15:15:03,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:15:03,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:15:03,706 INFO L175 Difference]: Start difference. First operand has 281 places, 394 transitions, 7199 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:15:03,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 413 transitions, 8343 flow [2024-06-20 15:15:05,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 413 transitions, 8129 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:05,396 INFO L231 Difference]: Finished difference. Result has 280 places, 396 transitions, 7336 flow [2024-06-20 15:15:05,397 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} [2024-06-20 15:15:05,397 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-20 15:15:05,397 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 396 transitions, 7336 flow [2024-06-20 15:15:05,397 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) [2024-06-20 15:15:05,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:05,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:05,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:15:05,398 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:05,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:05,398 INFO L85 PathProgramCache]: Analyzing trace with hash 705718430, now seen corresponding path program 8 times [2024-06-20 15:15:05,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:05,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955902555] [2024-06-20 15:15:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:05,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:05,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:05,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955902555] [2024-06-20 15:15:05,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955902555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:05,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:05,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:05,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134505850] [2024-06-20 15:15:05,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:05,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:05,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:05,568 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) [2024-06-20 15:15:05,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:05,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:05,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:06,607 INFO L124 PetriNetUnfolderBase]: 3619/6198 cut-off events. [2024-06-20 15:15:06,607 INFO L125 PetriNetUnfolderBase]: For 419505/419509 co-relation queries the response was YES. [2024-06-20 15:15:06,664 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. [2024-06-20 15:15:06,687 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 370 selfloop transitions, 25 changer transitions 4/406 dead transitions. [2024-06-20 15:15:06,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 406 transitions, 8158 flow [2024-06-20 15:15:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-20 15:15:06,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 15:15:06,688 INFO L175 Difference]: Start difference. First operand has 280 places, 396 transitions, 7336 flow. Second operand 6 states and 134 transitions. [2024-06-20 15:15:06,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 406 transitions, 8158 flow [2024-06-20 15:15:08,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 406 transitions, 7828 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:08,612 INFO L231 Difference]: Finished difference. Result has 282 places, 392 transitions, 6975 flow [2024-06-20 15:15:08,612 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} [2024-06-20 15:15:08,612 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-20 15:15:08,612 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 392 transitions, 6975 flow [2024-06-20 15:15:08,613 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) [2024-06-20 15:15:08,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:08,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:08,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:15:08,613 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:08,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:08,613 INFO L85 PathProgramCache]: Analyzing trace with hash 698486750, now seen corresponding path program 9 times [2024-06-20 15:15:08,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:08,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583885390] [2024-06-20 15:15:08,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:08,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:08,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:08,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583885390] [2024-06-20 15:15:08,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583885390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:08,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:08,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:08,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007070125] [2024-06-20 15:15:08,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:08,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:08,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:08,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:08,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:08,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:08,834 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) [2024-06-20 15:15:08,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:08,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:08,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:09,912 INFO L124 PetriNetUnfolderBase]: 3546/6069 cut-off events. [2024-06-20 15:15:09,913 INFO L125 PetriNetUnfolderBase]: For 430961/430965 co-relation queries the response was YES. [2024-06-20 15:15:09,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47445 conditions, 6069 events. 3546/6069 cut-off events. For 430961/430965 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 41978 event pairs, 1146 based on Foata normal form. 3/6067 useless extension candidates. Maximal degree in co-relation 47309. Up to 5251 conditions per place. [2024-06-20 15:15:09,989 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 159 changer transitions 1/415 dead transitions. [2024-06-20 15:15:09,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 415 transitions, 8045 flow [2024-06-20 15:15:09,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:09,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:15:09,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-20 15:15:09,990 INFO L175 Difference]: Start difference. First operand has 282 places, 392 transitions, 6975 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:15:09,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 415 transitions, 8045 flow [2024-06-20 15:15:11,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 415 transitions, 7754 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:11,724 INFO L231 Difference]: Finished difference. Result has 281 places, 395 transitions, 7081 flow [2024-06-20 15:15:11,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6684, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7081, PETRI_PLACES=281, PETRI_TRANSITIONS=395} [2024-06-20 15:15:11,724 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-20 15:15:11,725 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 395 transitions, 7081 flow [2024-06-20 15:15:11,725 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) [2024-06-20 15:15:11,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:11,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:11,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:15:11,725 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:11,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash 698475590, now seen corresponding path program 10 times [2024-06-20 15:15:11,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:11,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389321786] [2024-06-20 15:15:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:11,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:11,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:11,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389321786] [2024-06-20 15:15:11,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389321786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:11,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:11,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:11,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937253229] [2024-06-20 15:15:11,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:11,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:11,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:11,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:11,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:11,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:11,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 395 transitions, 7081 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) [2024-06-20 15:15:11,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:11,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:11,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:12,907 INFO L124 PetriNetUnfolderBase]: 3511/6008 cut-off events. [2024-06-20 15:15:12,908 INFO L125 PetriNetUnfolderBase]: For 439775/439779 co-relation queries the response was YES. [2024-06-20 15:15:12,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47103 conditions, 6008 events. 3511/6008 cut-off events. For 439775/439779 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 41390 event pairs, 1130 based on Foata normal form. 3/6006 useless extension candidates. Maximal degree in co-relation 46969. Up to 5192 conditions per place. [2024-06-20 15:15:12,985 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 159 changer transitions 2/420 dead transitions. [2024-06-20 15:15:12,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 420 transitions, 7969 flow [2024-06-20 15:15:12,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-20 15:15:12,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-20 15:15:12,986 INFO L175 Difference]: Start difference. First operand has 281 places, 395 transitions, 7081 flow. Second operand 9 states and 212 transitions. [2024-06-20 15:15:12,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 420 transitions, 7969 flow [2024-06-20 15:15:14,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 420 transitions, 7541 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:14,622 INFO L231 Difference]: Finished difference. Result has 283 places, 393 transitions, 6962 flow [2024-06-20 15:15:14,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6653, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6962, PETRI_PLACES=283, PETRI_TRANSITIONS=393} [2024-06-20 15:15:14,622 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-20 15:15:14,623 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 393 transitions, 6962 flow [2024-06-20 15:15:14,623 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) [2024-06-20 15:15:14,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:14,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:14,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:15:14,623 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:14,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:14,624 INFO L85 PathProgramCache]: Analyzing trace with hash -347037844, now seen corresponding path program 6 times [2024-06-20 15:15:14,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:14,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807841715] [2024-06-20 15:15:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:14,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:14,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:14,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807841715] [2024-06-20 15:15:14,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807841715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:14,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:14,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:14,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283876344] [2024-06-20 15:15:14,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:14,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:14,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:14,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:14,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:14,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 393 transitions, 6962 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) [2024-06-20 15:15:14,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:14,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:14,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:15,757 INFO L124 PetriNetUnfolderBase]: 3449/5905 cut-off events. [2024-06-20 15:15:15,758 INFO L125 PetriNetUnfolderBase]: For 453032/453036 co-relation queries the response was YES. [2024-06-20 15:15:15,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46977 conditions, 5905 events. 3449/5905 cut-off events. For 453032/453036 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 40523 event pairs, 1097 based on Foata normal form. 2/5902 useless extension candidates. Maximal degree in co-relation 46842. Up to 4889 conditions per place. [2024-06-20 15:15:15,832 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 203 selfloop transitions, 224 changer transitions 0/434 dead transitions. [2024-06-20 15:15:15,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 434 transitions, 8556 flow [2024-06-20 15:15:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:15:15,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-20 15:15:15,834 INFO L175 Difference]: Start difference. First operand has 283 places, 393 transitions, 6962 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:15:15,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 434 transitions, 8556 flow [2024-06-20 15:15:17,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 434 transitions, 8092 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-20 15:15:17,684 INFO L231 Difference]: Finished difference. Result has 280 places, 407 transitions, 7420 flow [2024-06-20 15:15:17,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6516, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7420, PETRI_PLACES=280, PETRI_TRANSITIONS=407} [2024-06-20 15:15:17,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-20 15:15:17,685 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 407 transitions, 7420 flow [2024-06-20 15:15:17,685 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) [2024-06-20 15:15:17,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:17,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:17,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:15:17,686 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:17,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:17,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1307766168, now seen corresponding path program 7 times [2024-06-20 15:15:17,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:17,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336859421] [2024-06-20 15:15:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:17,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:17,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:17,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336859421] [2024-06-20 15:15:17,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336859421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:17,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:17,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:17,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753249568] [2024-06-20 15:15:17,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:17,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:17,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:17,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:17,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:17,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 407 transitions, 7420 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) [2024-06-20 15:15:17,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:17,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:17,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:18,841 INFO L124 PetriNetUnfolderBase]: 3454/5913 cut-off events. [2024-06-20 15:15:18,842 INFO L125 PetriNetUnfolderBase]: For 434379/434383 co-relation queries the response was YES. [2024-06-20 15:15:18,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47889 conditions, 5913 events. 3454/5913 cut-off events. For 434379/434383 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 40595 event pairs, 1098 based on Foata normal form. 2/5910 useless extension candidates. Maximal degree in co-relation 47755. Up to 4893 conditions per place. [2024-06-20 15:15:18,916 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 203 selfloop transitions, 224 changer transitions 0/434 dead transitions. [2024-06-20 15:15:18,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 434 transitions, 8781 flow [2024-06-20 15:15:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:15:18,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-20 15:15:18,917 INFO L175 Difference]: Start difference. First operand has 280 places, 407 transitions, 7420 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:15:18,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 434 transitions, 8781 flow [2024-06-20 15:15:20,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 434 transitions, 8445 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:20,615 INFO L231 Difference]: Finished difference. Result has 284 places, 410 transitions, 7627 flow [2024-06-20 15:15:20,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7110, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7627, PETRI_PLACES=284, PETRI_TRANSITIONS=410} [2024-06-20 15:15:20,616 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-20 15:15:20,616 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 410 transitions, 7627 flow [2024-06-20 15:15:20,616 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) [2024-06-20 15:15:20,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:20,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:20,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:15:20,617 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:20,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:20,617 INFO L85 PathProgramCache]: Analyzing trace with hash -346738942, now seen corresponding path program 2 times [2024-06-20 15:15:20,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:20,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570709295] [2024-06-20 15:15:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:20,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:20,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:20,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570709295] [2024-06-20 15:15:20,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570709295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:20,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:20,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:20,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239810303] [2024-06-20 15:15:20,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:20,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:20,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:20,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:20,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:20,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:20,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 410 transitions, 7627 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) [2024-06-20 15:15:20,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:20,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:20,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:21,792 INFO L124 PetriNetUnfolderBase]: 3459/5919 cut-off events. [2024-06-20 15:15:21,792 INFO L125 PetriNetUnfolderBase]: For 441610/441617 co-relation queries the response was YES. [2024-06-20 15:15:21,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47002 conditions, 5919 events. 3459/5919 cut-off events. For 441610/441617 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 40576 event pairs, 1086 based on Foata normal form. 7/5923 useless extension candidates. Maximal degree in co-relation 46868. Up to 5197 conditions per place. [2024-06-20 15:15:21,865 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 285 selfloop transitions, 144 changer transitions 0/436 dead transitions. [2024-06-20 15:15:21,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 436 transitions, 8860 flow [2024-06-20 15:15:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:15:21,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:15:21,866 INFO L175 Difference]: Start difference. First operand has 284 places, 410 transitions, 7627 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:15:21,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 436 transitions, 8860 flow [2024-06-20 15:15:23,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 436 transitions, 8383 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:23,742 INFO L231 Difference]: Finished difference. Result has 287 places, 413 transitions, 7519 flow [2024-06-20 15:15:23,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7154, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7519, PETRI_PLACES=287, PETRI_TRANSITIONS=413} [2024-06-20 15:15:23,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-20 15:15:23,743 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 413 transitions, 7519 flow [2024-06-20 15:15:23,743 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) [2024-06-20 15:15:23,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:23,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:23,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:15:23,744 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:23,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:23,744 INFO L85 PathProgramCache]: Analyzing trace with hash 957789780, now seen corresponding path program 3 times [2024-06-20 15:15:23,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:23,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191125157] [2024-06-20 15:15:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:23,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:23,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:23,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191125157] [2024-06-20 15:15:23,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191125157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:23,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:23,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:23,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312895086] [2024-06-20 15:15:23,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:23,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:23,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:23,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:23,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:23,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 413 transitions, 7519 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) [2024-06-20 15:15:23,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:23,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:23,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:24,993 INFO L124 PetriNetUnfolderBase]: 3464/5932 cut-off events. [2024-06-20 15:15:24,993 INFO L125 PetriNetUnfolderBase]: For 453036/453043 co-relation queries the response was YES. [2024-06-20 15:15:25,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47058 conditions, 5932 events. 3464/5932 cut-off events. For 453036/453043 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 40702 event pairs, 1089 based on Foata normal form. 7/5936 useless extension candidates. Maximal degree in co-relation 46923. Up to 5203 conditions per place. [2024-06-20 15:15:25,072 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 283 selfloop transitions, 147 changer transitions 0/437 dead transitions. [2024-06-20 15:15:25,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 437 transitions, 8878 flow [2024-06-20 15:15:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:25,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:15:25,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:15:25,074 INFO L175 Difference]: Start difference. First operand has 287 places, 413 transitions, 7519 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:15:25,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 437 transitions, 8878 flow [2024-06-20 15:15:27,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 437 transitions, 8534 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:27,085 INFO L231 Difference]: Finished difference. Result has 289 places, 416 transitions, 7552 flow [2024-06-20 15:15:27,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7552, PETRI_PLACES=289, PETRI_TRANSITIONS=416} [2024-06-20 15:15:27,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-20 15:15:27,086 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 416 transitions, 7552 flow [2024-06-20 15:15:27,086 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) [2024-06-20 15:15:27,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:27,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:27,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:15:27,087 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:27,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:27,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2038336406, now seen corresponding path program 8 times [2024-06-20 15:15:27,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:27,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229840623] [2024-06-20 15:15:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:27,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:27,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:27,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229840623] [2024-06-20 15:15:27,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229840623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:27,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:27,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:27,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906343370] [2024-06-20 15:15:27,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:27,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:27,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:27,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:27,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:27,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:27,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 416 transitions, 7552 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) [2024-06-20 15:15:27,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:27,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:27,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:28,217 INFO L124 PetriNetUnfolderBase]: 3469/5939 cut-off events. [2024-06-20 15:15:28,218 INFO L125 PetriNetUnfolderBase]: For 466414/466418 co-relation queries the response was YES. [2024-06-20 15:15:28,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47292 conditions, 5939 events. 3469/5939 cut-off events. For 466414/466418 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40747 event pairs, 1097 based on Foata normal form. 2/5936 useless extension candidates. Maximal degree in co-relation 47156. Up to 4905 conditions per place. [2024-06-20 15:15:28,291 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 198 selfloop transitions, 234 changer transitions 0/439 dead transitions. [2024-06-20 15:15:28,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 439 transitions, 8782 flow [2024-06-20 15:15:28,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:15:28,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:15:28,292 INFO L175 Difference]: Start difference. First operand has 289 places, 416 transitions, 7552 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:15:28,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 439 transitions, 8782 flow [2024-06-20 15:15:30,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 439 transitions, 8303 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:30,371 INFO L231 Difference]: Finished difference. Result has 290 places, 419 transitions, 7613 flow [2024-06-20 15:15:30,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7073, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7613, PETRI_PLACES=290, PETRI_TRANSITIONS=419} [2024-06-20 15:15:30,372 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-20 15:15:30,372 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 419 transitions, 7613 flow [2024-06-20 15:15:30,372 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) [2024-06-20 15:15:30,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:30,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:30,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:15:30,372 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:30,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1068674858, now seen corresponding path program 4 times [2024-06-20 15:15:30,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:30,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455160685] [2024-06-20 15:15:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:30,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:30,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:30,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455160685] [2024-06-20 15:15:30,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455160685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:30,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:30,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:30,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568724137] [2024-06-20 15:15:30,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:30,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:30,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:30,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:30,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:30,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:30,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 419 transitions, 7613 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) [2024-06-20 15:15:30,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:30,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:30,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:31,510 INFO L124 PetriNetUnfolderBase]: 3466/5937 cut-off events. [2024-06-20 15:15:31,510 INFO L125 PetriNetUnfolderBase]: For 478239/478246 co-relation queries the response was YES. [2024-06-20 15:15:31,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47215 conditions, 5937 events. 3466/5937 cut-off events. For 478239/478246 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40809 event pairs, 1089 based on Foata normal form. 7/5941 useless extension candidates. Maximal degree in co-relation 47080. Up to 5207 conditions per place. [2024-06-20 15:15:31,582 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 285 selfloop transitions, 147 changer transitions 0/439 dead transitions. [2024-06-20 15:15:31,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 439 transitions, 8781 flow [2024-06-20 15:15:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 15:15:31,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:15:31,583 INFO L175 Difference]: Start difference. First operand has 290 places, 419 transitions, 7613 flow. Second operand 8 states and 184 transitions. [2024-06-20 15:15:31,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 439 transitions, 8781 flow [2024-06-20 15:15:33,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 439 transitions, 8493 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:33,531 INFO L231 Difference]: Finished difference. Result has 294 places, 419 transitions, 7625 flow [2024-06-20 15:15:33,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7325, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7625, PETRI_PLACES=294, PETRI_TRANSITIONS=419} [2024-06-20 15:15:33,538 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-20 15:15:33,546 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 419 transitions, 7625 flow [2024-06-20 15:15:33,546 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) [2024-06-20 15:15:33,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:33,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:33,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:15:33,547 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:33,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash 946629308, now seen corresponding path program 11 times [2024-06-20 15:15:33,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:33,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020524923] [2024-06-20 15:15:33,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:33,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:33,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:33,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020524923] [2024-06-20 15:15:33,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020524923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:33,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:33,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:33,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181580228] [2024-06-20 15:15:33,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:33,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:33,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:33,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:33,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:33,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 419 transitions, 7625 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) [2024-06-20 15:15:33,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:33,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:33,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:34,708 INFO L124 PetriNetUnfolderBase]: 3508/6000 cut-off events. [2024-06-20 15:15:34,708 INFO L125 PetriNetUnfolderBase]: For 504193/504197 co-relation queries the response was YES. [2024-06-20 15:15:34,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48056 conditions, 6000 events. 3508/6000 cut-off events. For 504193/504197 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41163 event pairs, 1093 based on Foata normal form. 3/5998 useless extension candidates. Maximal degree in co-relation 47920. Up to 5273 conditions per place. [2024-06-20 15:15:34,785 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 332 selfloop transitions, 112 changer transitions 0/451 dead transitions. [2024-06-20 15:15:34,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 451 transitions, 9095 flow [2024-06-20 15:15:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-20 15:15:34,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 15:15:34,786 INFO L175 Difference]: Start difference. First operand has 294 places, 419 transitions, 7625 flow. Second operand 9 states and 204 transitions. [2024-06-20 15:15:34,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 451 transitions, 9095 flow [2024-06-20 15:15:37,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 451 transitions, 8685 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:37,223 INFO L231 Difference]: Finished difference. Result has 296 places, 433 transitions, 7790 flow [2024-06-20 15:15:37,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7215, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7790, PETRI_PLACES=296, PETRI_TRANSITIONS=433} [2024-06-20 15:15:37,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-20 15:15:37,224 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 433 transitions, 7790 flow [2024-06-20 15:15:37,224 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) [2024-06-20 15:15:37,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:37,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:37,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:15:37,225 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:37,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:37,225 INFO L85 PathProgramCache]: Analyzing trace with hash -870558362, now seen corresponding path program 5 times [2024-06-20 15:15:37,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:37,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971877782] [2024-06-20 15:15:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:37,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:37,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:37,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971877782] [2024-06-20 15:15:37,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971877782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:37,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:37,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:37,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686324292] [2024-06-20 15:15:37,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:37,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:37,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:37,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:37,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:37,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:37,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 433 transitions, 7790 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) [2024-06-20 15:15:37,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:37,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:37,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:38,435 INFO L124 PetriNetUnfolderBase]: 3505/6004 cut-off events. [2024-06-20 15:15:38,435 INFO L125 PetriNetUnfolderBase]: For 512865/512872 co-relation queries the response was YES. [2024-06-20 15:15:38,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48199 conditions, 6004 events. 3505/6004 cut-off events. For 512865/512872 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 41358 event pairs, 1086 based on Foata normal form. 7/6008 useless extension candidates. Maximal degree in co-relation 48061. Up to 5408 conditions per place. [2024-06-20 15:15:38,511 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 382 selfloop transitions, 61 changer transitions 0/450 dead transitions. [2024-06-20 15:15:38,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 450 transitions, 8848 flow [2024-06-20 15:15:38,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:38,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-20 15:15:38,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-20 15:15:38,512 INFO L175 Difference]: Start difference. First operand has 296 places, 433 transitions, 7790 flow. Second operand 9 states and 197 transitions. [2024-06-20 15:15:38,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 450 transitions, 8848 flow [2024-06-20 15:15:41,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 450 transitions, 8708 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:41,269 INFO L231 Difference]: Finished difference. Result has 301 places, 433 transitions, 7778 flow [2024-06-20 15:15:41,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7778, PETRI_PLACES=301, PETRI_TRANSITIONS=433} [2024-06-20 15:15:41,269 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-20 15:15:41,269 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 433 transitions, 7778 flow [2024-06-20 15:15:41,270 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) [2024-06-20 15:15:41,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:41,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:41,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:15:41,270 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:41,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:41,270 INFO L85 PathProgramCache]: Analyzing trace with hash 941088554, now seen corresponding path program 6 times [2024-06-20 15:15:41,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:41,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090452394] [2024-06-20 15:15:41,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:41,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:41,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:41,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090452394] [2024-06-20 15:15:41,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090452394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:41,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:41,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:41,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085204289] [2024-06-20 15:15:41,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:41,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:41,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:41,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:41,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:41,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 433 transitions, 7778 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) [2024-06-20 15:15:41,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:41,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:41,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:42,509 INFO L124 PetriNetUnfolderBase]: 3502/5999 cut-off events. [2024-06-20 15:15:42,510 INFO L125 PetriNetUnfolderBase]: For 524561/524568 co-relation queries the response was YES. [2024-06-20 15:15:42,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48354 conditions, 5999 events. 3502/5999 cut-off events. For 524561/524568 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 41298 event pairs, 1086 based on Foata normal form. 7/6003 useless extension candidates. Maximal degree in co-relation 48214. Up to 5405 conditions per place. [2024-06-20 15:15:42,588 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 381 selfloop transitions, 61 changer transitions 0/449 dead transitions. [2024-06-20 15:15:42,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 449 transitions, 8700 flow [2024-06-20 15:15:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-20 15:15:42,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-20 15:15:42,589 INFO L175 Difference]: Start difference. First operand has 301 places, 433 transitions, 7778 flow. Second operand 9 states and 196 transitions. [2024-06-20 15:15:42,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 449 transitions, 8700 flow [2024-06-20 15:15:44,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 449 transitions, 8532 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:44,671 INFO L231 Difference]: Finished difference. Result has 302 places, 433 transitions, 7738 flow [2024-06-20 15:15:44,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7610, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7738, PETRI_PLACES=302, PETRI_TRANSITIONS=433} [2024-06-20 15:15:44,672 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-20 15:15:44,672 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 433 transitions, 7738 flow [2024-06-20 15:15:44,672 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) [2024-06-20 15:15:44,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:44,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:44,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:15:44,672 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:44,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:44,673 INFO L85 PathProgramCache]: Analyzing trace with hash 941088182, now seen corresponding path program 9 times [2024-06-20 15:15:44,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:44,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130108912] [2024-06-20 15:15:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:44,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:44,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:44,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130108912] [2024-06-20 15:15:44,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130108912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:44,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:44,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:44,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495291895] [2024-06-20 15:15:44,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:44,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:44,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:44,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:44,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:44,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:44,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 433 transitions, 7738 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) [2024-06-20 15:15:44,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:44,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:44,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:45,886 INFO L124 PetriNetUnfolderBase]: 3496/5988 cut-off events. [2024-06-20 15:15:45,886 INFO L125 PetriNetUnfolderBase]: For 536511/536515 co-relation queries the response was YES. [2024-06-20 15:15:45,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48328 conditions, 5988 events. 3496/5988 cut-off events. For 536511/536515 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 41195 event pairs, 1094 based on Foata normal form. 3/5986 useless extension candidates. Maximal degree in co-relation 48187. Up to 5264 conditions per place. [2024-06-20 15:15:45,965 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 332 selfloop transitions, 112 changer transitions 0/451 dead transitions. [2024-06-20 15:15:45,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 451 transitions, 8940 flow [2024-06-20 15:15:45,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-20 15:15:45,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 15:15:45,967 INFO L175 Difference]: Start difference. First operand has 302 places, 433 transitions, 7738 flow. Second operand 9 states and 204 transitions. [2024-06-20 15:15:45,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 451 transitions, 8940 flow [2024-06-20 15:15:48,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 451 transitions, 8784 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:48,310 INFO L231 Difference]: Finished difference. Result has 303 places, 433 transitions, 7813 flow [2024-06-20 15:15:48,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7582, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7813, PETRI_PLACES=303, PETRI_TRANSITIONS=433} [2024-06-20 15:15:48,310 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-20 15:15:48,310 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 433 transitions, 7813 flow [2024-06-20 15:15:48,311 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) [2024-06-20 15:15:48,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:48,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:48,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:15:48,311 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:48,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:48,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1665056940, now seen corresponding path program 12 times [2024-06-20 15:15:48,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:48,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989377122] [2024-06-20 15:15:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:48,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:48,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:48,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989377122] [2024-06-20 15:15:48,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989377122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:48,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:48,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:48,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710381479] [2024-06-20 15:15:48,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:48,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:48,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:48,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:48,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:48,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:48,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 433 transitions, 7813 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) [2024-06-20 15:15:48,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:48,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:48,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:49,599 INFO L124 PetriNetUnfolderBase]: 3514/6016 cut-off events. [2024-06-20 15:15:49,600 INFO L125 PetriNetUnfolderBase]: For 554004/554008 co-relation queries the response was YES. [2024-06-20 15:15:49,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48999 conditions, 6016 events. 3514/6016 cut-off events. For 554004/554008 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 41391 event pairs, 1091 based on Foata normal form. 3/6014 useless extension candidates. Maximal degree in co-relation 48857. Up to 5042 conditions per place. [2024-06-20 15:15:49,673 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 244 selfloop transitions, 212 changer transitions 0/463 dead transitions. [2024-06-20 15:15:49,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 463 transitions, 9254 flow [2024-06-20 15:15:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-20 15:15:49,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-20 15:15:49,674 INFO L175 Difference]: Start difference. First operand has 303 places, 433 transitions, 7813 flow. Second operand 9 states and 209 transitions. [2024-06-20 15:15:49,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 463 transitions, 9254 flow [2024-06-20 15:15:52,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 463 transitions, 8977 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:52,297 INFO L231 Difference]: Finished difference. Result has 305 places, 442 transitions, 8183 flow [2024-06-20 15:15:52,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7536, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8183, PETRI_PLACES=305, PETRI_TRANSITIONS=442} [2024-06-20 15:15:52,297 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-20 15:15:52,297 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 442 transitions, 8183 flow [2024-06-20 15:15:52,297 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) [2024-06-20 15:15:52,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:52,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:52,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:15:52,298 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:52,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash 386186008, now seen corresponding path program 7 times [2024-06-20 15:15:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:52,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292876819] [2024-06-20 15:15:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:52,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:52,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:52,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292876819] [2024-06-20 15:15:52,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292876819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:52,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:52,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:52,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783124844] [2024-06-20 15:15:52,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:52,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:52,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:52,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:52,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:52,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:52,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 442 transitions, 8183 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) [2024-06-20 15:15:52,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:52,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:52,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:53,560 INFO L124 PetriNetUnfolderBase]: 3519/6029 cut-off events. [2024-06-20 15:15:53,561 INFO L125 PetriNetUnfolderBase]: For 566893/566900 co-relation queries the response was YES. [2024-06-20 15:15:53,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49550 conditions, 6029 events. 3519/6029 cut-off events. For 566893/566900 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 41567 event pairs, 1086 based on Foata normal form. 7/6033 useless extension candidates. Maximal degree in co-relation 49407. Up to 5315 conditions per place. [2024-06-20 15:15:53,644 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 339 selfloop transitions, 120 changer transitions 0/466 dead transitions. [2024-06-20 15:15:53,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 466 transitions, 9493 flow [2024-06-20 15:15:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-20 15:15:53,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-20 15:15:53,645 INFO L175 Difference]: Start difference. First operand has 305 places, 442 transitions, 8183 flow. Second operand 9 states and 203 transitions. [2024-06-20 15:15:53,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 466 transitions, 9493 flow [2024-06-20 15:15:55,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 466 transitions, 9343 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:55,860 INFO L231 Difference]: Finished difference. Result has 310 places, 445 transitions, 8349 flow [2024-06-20 15:15:55,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8037, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8349, PETRI_PLACES=310, PETRI_TRANSITIONS=445} [2024-06-20 15:15:55,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-20 15:15:55,861 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 445 transitions, 8349 flow [2024-06-20 15:15:55,861 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) [2024-06-20 15:15:55,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:55,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:55,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:15:55,862 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:55,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash 380644696, now seen corresponding path program 10 times [2024-06-20 15:15:55,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:55,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963764386] [2024-06-20 15:15:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:55,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:55,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:55,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963764386] [2024-06-20 15:15:55,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963764386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:55,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:55,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:55,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425566872] [2024-06-20 15:15:55,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:55,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:55,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:55,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:55,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:56,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:56,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 445 transitions, 8349 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) [2024-06-20 15:15:56,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:56,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:56,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:57,093 INFO L124 PetriNetUnfolderBase]: 3513/6020 cut-off events. [2024-06-20 15:15:57,094 INFO L125 PetriNetUnfolderBase]: For 565910/565914 co-relation queries the response was YES. [2024-06-20 15:15:57,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49565 conditions, 6020 events. 3513/6020 cut-off events. For 565910/565914 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 41519 event pairs, 1094 based on Foata normal form. 3/6018 useless extension candidates. Maximal degree in co-relation 49420. Up to 5041 conditions per place. [2024-06-20 15:15:57,305 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 245 selfloop transitions, 220 changer transitions 0/472 dead transitions. [2024-06-20 15:15:57,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 472 transitions, 9625 flow [2024-06-20 15:15:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:57,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:57,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 15:15:57,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:15:57,306 INFO L175 Difference]: Start difference. First operand has 310 places, 445 transitions, 8349 flow. Second operand 9 states and 216 transitions. [2024-06-20 15:15:57,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 472 transitions, 9625 flow [2024-06-20 15:15:59,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 472 transitions, 9362 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:59,622 INFO L231 Difference]: Finished difference. Result has 312 places, 445 transitions, 8546 flow [2024-06-20 15:15:59,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8090, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8546, PETRI_PLACES=312, PETRI_TRANSITIONS=445} [2024-06-20 15:15:59,622 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-20 15:15:59,623 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 445 transitions, 8546 flow [2024-06-20 15:15:59,623 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) [2024-06-20 15:15:59,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:59,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:59,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:15:59,623 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:59,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:59,624 INFO L85 PathProgramCache]: Analyzing trace with hash 380645068, now seen corresponding path program 8 times [2024-06-20 15:15:59,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:59,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211160592] [2024-06-20 15:15:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:59,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:59,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:59,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211160592] [2024-06-20 15:15:59,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211160592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:59,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:59,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:59,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458164986] [2024-06-20 15:15:59,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:59,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:59,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:59,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:59,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:59,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:59,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 445 transitions, 8546 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) [2024-06-20 15:15:59,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:59,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:59,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:00,949 INFO L124 PetriNetUnfolderBase]: 3510/6015 cut-off events. [2024-06-20 15:16:00,949 INFO L125 PetriNetUnfolderBase]: For 563171/563178 co-relation queries the response was YES. [2024-06-20 15:16:01,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49706 conditions, 6015 events. 3510/6015 cut-off events. For 563171/563178 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 41388 event pairs, 1083 based on Foata normal form. 7/6019 useless extension candidates. Maximal degree in co-relation 49561. Up to 5304 conditions per place. [2024-06-20 15:16:01,032 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 337 selfloop transitions, 124 changer transitions 0/468 dead transitions. [2024-06-20 15:16:01,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 468 transitions, 9664 flow [2024-06-20 15:16:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-20 15:16:01,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-20 15:16:01,033 INFO L175 Difference]: Start difference. First operand has 312 places, 445 transitions, 8546 flow. Second operand 9 states and 205 transitions. [2024-06-20 15:16:01,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 468 transitions, 9664 flow [2024-06-20 15:16:03,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 468 transitions, 9145 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-20 15:16:03,716 INFO L231 Difference]: Finished difference. Result has 311 places, 445 transitions, 8287 flow [2024-06-20 15:16:03,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8029, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8287, PETRI_PLACES=311, PETRI_TRANSITIONS=445} [2024-06-20 15:16:03,717 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-20 15:16:03,717 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 445 transitions, 8287 flow [2024-06-20 15:16:03,717 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) [2024-06-20 15:16:03,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:03,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:03,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:16:03,717 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:03,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:03,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1315944640, now seen corresponding path program 13 times [2024-06-20 15:16:03,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:03,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206103894] [2024-06-20 15:16:03,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:03,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:03,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206103894] [2024-06-20 15:16:03,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206103894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:03,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:03,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:03,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896357705] [2024-06-20 15:16:03,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:03,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:03,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:03,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:03,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:03,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:03,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 445 transitions, 8287 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) [2024-06-20 15:16:03,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:03,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:03,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:04,921 INFO L124 PetriNetUnfolderBase]: 3523/6035 cut-off events. [2024-06-20 15:16:04,922 INFO L125 PetriNetUnfolderBase]: For 566351/566358 co-relation queries the response was YES. [2024-06-20 15:16:04,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49670 conditions, 6035 events. 3523/6035 cut-off events. For 566351/566358 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 41611 event pairs, 1122 based on Foata normal form. 4/6031 useless extension candidates. Maximal degree in co-relation 49525. Up to 5049 conditions per place. [2024-06-20 15:16:04,999 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 215 changer transitions 0/470 dead transitions. [2024-06-20 15:16:05,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 470 transitions, 9967 flow [2024-06-20 15:16:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:16:05,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:16:05,001 INFO L175 Difference]: Start difference. First operand has 311 places, 445 transitions, 8287 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:16:05,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 470 transitions, 9967 flow [2024-06-20 15:16:07,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 470 transitions, 9608 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-20 15:16:07,842 INFO L231 Difference]: Finished difference. Result has 309 places, 451 transitions, 8522 flow [2024-06-20 15:16:07,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7936, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8522, PETRI_PLACES=309, PETRI_TRANSITIONS=451} [2024-06-20 15:16:07,843 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-20 15:16:07,844 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 451 transitions, 8522 flow [2024-06-20 15:16:07,844 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) [2024-06-20 15:16:07,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:07,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:07,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:16:07,844 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:07,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:07,845 INFO L85 PathProgramCache]: Analyzing trace with hash 122630972, now seen corresponding path program 14 times [2024-06-20 15:16:07,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:07,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694454256] [2024-06-20 15:16:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:07,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:07,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:07,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694454256] [2024-06-20 15:16:07,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694454256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:07,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:07,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:07,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207244755] [2024-06-20 15:16:07,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:07,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:07,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:07,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:07,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:08,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:08,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 451 transitions, 8522 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) [2024-06-20 15:16:08,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:08,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:08,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:09,073 INFO L124 PetriNetUnfolderBase]: 3520/6024 cut-off events. [2024-06-20 15:16:09,074 INFO L125 PetriNetUnfolderBase]: For 562753/562757 co-relation queries the response was YES. [2024-06-20 15:16:09,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49653 conditions, 6024 events. 3520/6024 cut-off events. For 562753/562757 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 41489 event pairs, 1089 based on Foata normal form. 2/6021 useless extension candidates. Maximal degree in co-relation 49509. Up to 5485 conditions per place. [2024-06-20 15:16:09,153 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 424 selfloop transitions, 31 changer transitions 0/462 dead transitions. [2024-06-20 15:16:09,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 462 transitions, 9458 flow [2024-06-20 15:16:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:16:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:16:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-20 15:16:09,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-20 15:16:09,154 INFO L175 Difference]: Start difference. First operand has 309 places, 451 transitions, 8522 flow. Second operand 7 states and 152 transitions. [2024-06-20 15:16:09,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 462 transitions, 9458 flow [2024-06-20 15:16:11,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 462 transitions, 8882 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:11,699 INFO L231 Difference]: Finished difference. Result has 311 places, 451 transitions, 8014 flow [2024-06-20 15:16:11,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7946, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8014, PETRI_PLACES=311, PETRI_TRANSITIONS=451} [2024-06-20 15:16:11,700 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-20 15:16:11,700 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 451 transitions, 8014 flow [2024-06-20 15:16:11,701 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) [2024-06-20 15:16:11,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:11,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:11,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:16:11,701 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:11,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:11,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1315944454, now seen corresponding path program 9 times [2024-06-20 15:16:11,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:11,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350056878] [2024-06-20 15:16:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:11,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:11,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:11,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350056878] [2024-06-20 15:16:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350056878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:11,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:11,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:11,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366612275] [2024-06-20 15:16:11,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:11,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:11,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:11,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:11,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 451 transitions, 8014 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) [2024-06-20 15:16:11,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:11,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:11,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:12,961 INFO L124 PetriNetUnfolderBase]: 3525/6051 cut-off events. [2024-06-20 15:16:12,962 INFO L125 PetriNetUnfolderBase]: For 575106/575116 co-relation queries the response was YES. [2024-06-20 15:16:13,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49196 conditions, 6051 events. 3525/6051 cut-off events. For 575106/575116 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41844 event pairs, 1105 based on Foata normal form. 9/6054 useless extension candidates. Maximal degree in co-relation 49052. Up to 5324 conditions per place. [2024-06-20 15:16:13,045 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 342 selfloop transitions, 122 changer transitions 0/471 dead transitions. [2024-06-20 15:16:13,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 471 transitions, 9187 flow [2024-06-20 15:16:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-20 15:16:13,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:16:13,046 INFO L175 Difference]: Start difference. First operand has 311 places, 451 transitions, 8014 flow. Second operand 9 states and 198 transitions. [2024-06-20 15:16:13,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 471 transitions, 9187 flow [2024-06-20 15:16:15,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 471 transitions, 9073 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:15,586 INFO L231 Difference]: Finished difference. Result has 312 places, 454 transitions, 8213 flow [2024-06-20 15:16:15,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7900, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8213, PETRI_PLACES=312, PETRI_TRANSITIONS=454} [2024-06-20 15:16:15,587 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-20 15:16:15,587 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 454 transitions, 8213 flow [2024-06-20 15:16:15,587 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) [2024-06-20 15:16:15,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:15,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:15,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:16:15,588 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:15,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:15,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1858996536, now seen corresponding path program 10 times [2024-06-20 15:16:15,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:15,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289421583] [2024-06-20 15:16:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:15,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:15,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:15,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289421583] [2024-06-20 15:16:15,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289421583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:15,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:15,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:15,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704797749] [2024-06-20 15:16:15,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:15,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:15,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:15,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:15,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:15,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 454 transitions, 8213 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) [2024-06-20 15:16:15,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:15,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:15,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:16,805 INFO L124 PetriNetUnfolderBase]: 3522/6043 cut-off events. [2024-06-20 15:16:16,806 INFO L125 PetriNetUnfolderBase]: For 588958/588968 co-relation queries the response was YES. [2024-06-20 15:16:16,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49499 conditions, 6043 events. 3522/6043 cut-off events. For 588958/588968 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41751 event pairs, 1103 based on Foata normal form. 9/6046 useless extension candidates. Maximal degree in co-relation 49355. Up to 5321 conditions per place. [2024-06-20 15:16:16,886 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 341 selfloop transitions, 121 changer transitions 0/469 dead transitions. [2024-06-20 15:16:16,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 469 transitions, 9173 flow [2024-06-20 15:16:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-20 15:16:16,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-20 15:16:16,887 INFO L175 Difference]: Start difference. First operand has 312 places, 454 transitions, 8213 flow. Second operand 8 states and 178 transitions. [2024-06-20 15:16:16,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 469 transitions, 9173 flow [2024-06-20 15:16:19,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 469 transitions, 8744 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:19,298 INFO L231 Difference]: Finished difference. Result has 312 places, 454 transitions, 8032 flow [2024-06-20 15:16:19,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7784, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8032, PETRI_PLACES=312, PETRI_TRANSITIONS=454} [2024-06-20 15:16:19,299 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-20 15:16:19,299 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 454 transitions, 8032 flow [2024-06-20 15:16:19,299 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) [2024-06-20 15:16:19,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:19,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:19,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:16:19,300 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:19,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:19,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1138813120, now seen corresponding path program 15 times [2024-06-20 15:16:19,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:19,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734823464] [2024-06-20 15:16:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:19,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:19,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:19,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734823464] [2024-06-20 15:16:19,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734823464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:19,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:19,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:19,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954810027] [2024-06-20 15:16:19,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:19,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:19,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:19,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:19,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:19,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:19,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 454 transitions, 8032 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) [2024-06-20 15:16:19,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:19,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:19,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:20,484 INFO L124 PetriNetUnfolderBase]: 3519/6032 cut-off events. [2024-06-20 15:16:20,484 INFO L125 PetriNetUnfolderBase]: For 600805/600812 co-relation queries the response was YES. [2024-06-20 15:16:20,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49290 conditions, 6032 events. 3519/6032 cut-off events. For 600805/600812 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 41632 event pairs, 1122 based on Foata normal form. 4/6028 useless extension candidates. Maximal degree in co-relation 49146. Up to 5047 conditions per place. [2024-06-20 15:16:20,564 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 218 changer transitions 0/471 dead transitions. [2024-06-20 15:16:20,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 471 transitions, 9292 flow [2024-06-20 15:16:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 15:16:20,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:16:20,565 INFO L175 Difference]: Start difference. First operand has 312 places, 454 transitions, 8032 flow. Second operand 8 states and 184 transitions. [2024-06-20 15:16:20,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 471 transitions, 9292 flow [2024-06-20 15:16:23,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 471 transitions, 8954 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:23,414 INFO L231 Difference]: Finished difference. Result has 312 places, 454 transitions, 8136 flow [2024-06-20 15:16:23,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7694, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8136, PETRI_PLACES=312, PETRI_TRANSITIONS=454} [2024-06-20 15:16:23,415 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-20 15:16:23,415 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 454 transitions, 8136 flow [2024-06-20 15:16:23,415 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) [2024-06-20 15:16:23,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:23,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:23,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:16:23,416 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:23,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1409342124, now seen corresponding path program 1 times [2024-06-20 15:16:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:23,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230742411] [2024-06-20 15:16:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:23,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:23,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:23,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230742411] [2024-06-20 15:16:23,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230742411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:23,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:23,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:23,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237593299] [2024-06-20 15:16:23,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:23,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:23,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:23,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:23,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:23,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:23,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 454 transitions, 8136 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) [2024-06-20 15:16:23,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:23,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:23,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:24,719 INFO L124 PetriNetUnfolderBase]: 3539/6064 cut-off events. [2024-06-20 15:16:24,719 INFO L125 PetriNetUnfolderBase]: For 628961/628961 co-relation queries the response was YES. [2024-06-20 15:16:24,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49892 conditions, 6064 events. 3539/6064 cut-off events. For 628961/628961 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 41836 event pairs, 1039 based on Foata normal form. 6/6068 useless extension candidates. Maximal degree in co-relation 49747. Up to 5383 conditions per place. [2024-06-20 15:16:24,793 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 428 selfloop transitions, 52 changer transitions 0/487 dead transitions. [2024-06-20 15:16:24,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 487 transitions, 9278 flow [2024-06-20 15:16:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:16:24,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:16:24,794 INFO L175 Difference]: Start difference. First operand has 312 places, 454 transitions, 8136 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:16:24,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 487 transitions, 9278 flow [2024-06-20 15:16:27,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 487 transitions, 8461 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-20 15:16:27,725 INFO L231 Difference]: Finished difference. Result has 310 places, 455 transitions, 7457 flow [2024-06-20 15:16:27,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7457, PETRI_PLACES=310, PETRI_TRANSITIONS=455} [2024-06-20 15:16:27,726 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-20 15:16:27,726 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 455 transitions, 7457 flow [2024-06-20 15:16:27,726 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) [2024-06-20 15:16:27,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:27,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:27,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:16:27,727 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:27,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1662454218, now seen corresponding path program 2 times [2024-06-20 15:16:27,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:27,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161347930] [2024-06-20 15:16:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:27,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:27,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:27,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161347930] [2024-06-20 15:16:27,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161347930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:27,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:27,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:27,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068985556] [2024-06-20 15:16:27,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:27,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:27,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:27,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:27,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:27,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:27,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 455 transitions, 7457 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) [2024-06-20 15:16:27,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:27,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:27,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:28,984 INFO L124 PetriNetUnfolderBase]: 3567/6118 cut-off events. [2024-06-20 15:16:28,985 INFO L125 PetriNetUnfolderBase]: For 645874/645874 co-relation queries the response was YES. [2024-06-20 15:16:29,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49707 conditions, 6118 events. 3567/6118 cut-off events. For 645874/645874 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42293 event pairs, 1090 based on Foata normal form. 8/6124 useless extension candidates. Maximal degree in co-relation 49562. Up to 5527 conditions per place. [2024-06-20 15:16:29,064 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 431 selfloop transitions, 43 changer transitions 0/481 dead transitions. [2024-06-20 15:16:29,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 481 transitions, 8555 flow [2024-06-20 15:16:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:29,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:29,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:16:29,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:16:29,065 INFO L175 Difference]: Start difference. First operand has 310 places, 455 transitions, 7457 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:16:29,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 481 transitions, 8555 flow [2024-06-20 15:16:31,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 481 transitions, 8427 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:31,893 INFO L231 Difference]: Finished difference. Result has 311 places, 456 transitions, 7445 flow [2024-06-20 15:16:31,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7330, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7445, PETRI_PLACES=311, PETRI_TRANSITIONS=456} [2024-06-20 15:16:31,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-20 15:16:31,894 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 456 transitions, 7445 flow [2024-06-20 15:16:31,894 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) [2024-06-20 15:16:31,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:31,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:31,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:16:31,895 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:31,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:31,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1575614538, now seen corresponding path program 3 times [2024-06-20 15:16:31,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:31,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768067831] [2024-06-20 15:16:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:31,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:32,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:32,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768067831] [2024-06-20 15:16:32,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768067831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:32,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:32,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:32,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572314016] [2024-06-20 15:16:32,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:32,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:32,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:32,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:32,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:32,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:32,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 456 transitions, 7445 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) [2024-06-20 15:16:32,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:32,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:32,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:33,246 INFO L124 PetriNetUnfolderBase]: 3587/6154 cut-off events. [2024-06-20 15:16:33,246 INFO L125 PetriNetUnfolderBase]: For 656125/656125 co-relation queries the response was YES. [2024-06-20 15:16:33,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49997 conditions, 6154 events. 3587/6154 cut-off events. For 656125/656125 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42599 event pairs, 1090 based on Foata normal form. 6/6158 useless extension candidates. Maximal degree in co-relation 49851. Up to 5529 conditions per place. [2024-06-20 15:16:33,318 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 433 selfloop transitions, 46 changer transitions 0/486 dead transitions. [2024-06-20 15:16:33,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 486 transitions, 8572 flow [2024-06-20 15:16:33,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-20 15:16:33,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 15:16:33,319 INFO L175 Difference]: Start difference. First operand has 311 places, 456 transitions, 7445 flow. Second operand 9 states and 200 transitions. [2024-06-20 15:16:33,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 486 transitions, 8572 flow [2024-06-20 15:16:35,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 486 transitions, 8471 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:35,736 INFO L231 Difference]: Finished difference. Result has 314 places, 457 transitions, 7466 flow [2024-06-20 15:16:35,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7344, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7466, PETRI_PLACES=314, PETRI_TRANSITIONS=457} [2024-06-20 15:16:35,736 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-20 15:16:35,736 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 457 transitions, 7466 flow [2024-06-20 15:16:35,736 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) [2024-06-20 15:16:35,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:35,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:35,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:16:35,737 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:35,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:35,737 INFO L85 PathProgramCache]: Analyzing trace with hash -875822534, now seen corresponding path program 4 times [2024-06-20 15:16:35,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:35,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572617452] [2024-06-20 15:16:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:35,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:35,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:35,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572617452] [2024-06-20 15:16:35,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572617452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:35,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:35,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:35,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255992085] [2024-06-20 15:16:35,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:35,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:35,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:35,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:35,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 457 transitions, 7466 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:35,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:35,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:35,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:37,022 INFO L124 PetriNetUnfolderBase]: 3655/6270 cut-off events. [2024-06-20 15:16:37,023 INFO L125 PetriNetUnfolderBase]: For 702220/702227 co-relation queries the response was YES. [2024-06-20 15:16:37,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51099 conditions, 6270 events. 3655/6270 cut-off events. For 702220/702227 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43569 event pairs, 1111 based on Foata normal form. 18/6285 useless extension candidates. Maximal degree in co-relation 50952. Up to 5414 conditions per place. [2024-06-20 15:16:37,106 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 424 selfloop transitions, 54 changer transitions 0/485 dead transitions. [2024-06-20 15:16:37,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 485 transitions, 8757 flow [2024-06-20 15:16:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 15:16:37,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:16:37,108 INFO L175 Difference]: Start difference. First operand has 314 places, 457 transitions, 7466 flow. Second operand 8 states and 184 transitions. [2024-06-20 15:16:37,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 485 transitions, 8757 flow [2024-06-20 15:16:40,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 485 transitions, 8667 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:40,140 INFO L231 Difference]: Finished difference. Result has 317 places, 462 transitions, 7607 flow [2024-06-20 15:16:40,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7376, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7607, PETRI_PLACES=317, PETRI_TRANSITIONS=462} [2024-06-20 15:16:40,140 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-20 15:16:40,141 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 462 transitions, 7607 flow [2024-06-20 15:16:40,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:40,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:40,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:40,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:16:40,141 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:40,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:40,141 INFO L85 PathProgramCache]: Analyzing trace with hash -870097082, now seen corresponding path program 1 times [2024-06-20 15:16:40,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:40,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413686258] [2024-06-20 15:16:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:40,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:40,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:40,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413686258] [2024-06-20 15:16:40,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413686258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:40,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:40,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:40,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291988136] [2024-06-20 15:16:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:40,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:40,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:40,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:40,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:40,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:40,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 462 transitions, 7607 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:40,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:40,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:40,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:41,439 INFO L124 PetriNetUnfolderBase]: 3629/6232 cut-off events. [2024-06-20 15:16:41,440 INFO L125 PetriNetUnfolderBase]: For 683997/684004 co-relation queries the response was YES. [2024-06-20 15:16:41,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50305 conditions, 6232 events. 3629/6232 cut-off events. For 683997/684004 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43234 event pairs, 1097 based on Foata normal form. 18/6247 useless extension candidates. Maximal degree in co-relation 50156. Up to 5402 conditions per place. [2024-06-20 15:16:41,528 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 424 selfloop transitions, 53 changer transitions 0/484 dead transitions. [2024-06-20 15:16:41,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 484 transitions, 8653 flow [2024-06-20 15:16:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:16:41,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 15:16:41,529 INFO L175 Difference]: Start difference. First operand has 317 places, 462 transitions, 7607 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:16:41,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 484 transitions, 8653 flow [2024-06-20 15:16:44,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 484 transitions, 8546 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:44,623 INFO L231 Difference]: Finished difference. Result has 322 places, 462 transitions, 7611 flow [2024-06-20 15:16:44,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7500, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7611, PETRI_PLACES=322, PETRI_TRANSITIONS=462} [2024-06-20 15:16:44,623 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-20 15:16:44,624 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 462 transitions, 7611 flow [2024-06-20 15:16:44,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:44,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:44,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:44,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:16:44,624 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:44,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1180926412, now seen corresponding path program 5 times [2024-06-20 15:16:44,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:44,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915042665] [2024-06-20 15:16:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:44,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:44,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:44,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915042665] [2024-06-20 15:16:44,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915042665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:44,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:44,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:16:44,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529052642] [2024-06-20 15:16:44,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:44,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:16:44,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:44,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:16:44,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:16:44,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:44,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 462 transitions, 7611 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:44,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:44,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:44,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:45,927 INFO L124 PetriNetUnfolderBase]: 3656/6287 cut-off events. [2024-06-20 15:16:45,927 INFO L125 PetriNetUnfolderBase]: For 699765/699772 co-relation queries the response was YES. [2024-06-20 15:16:45,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50237 conditions, 6287 events. 3656/6287 cut-off events. For 699765/699772 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43727 event pairs, 1025 based on Foata normal form. 24/6308 useless extension candidates. Maximal degree in co-relation 50086. Up to 4981 conditions per place. [2024-06-20 15:16:46,009 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 377 selfloop transitions, 109 changer transitions 0/493 dead transitions. [2024-06-20 15:16:46,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 493 transitions, 8889 flow [2024-06-20 15:16:46,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:16:46,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:16:46,011 INFO L175 Difference]: Start difference. First operand has 322 places, 462 transitions, 7611 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:16:46,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 493 transitions, 8889 flow [2024-06-20 15:16:49,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 493 transitions, 8787 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:49,309 INFO L231 Difference]: Finished difference. Result has 325 places, 464 transitions, 7785 flow [2024-06-20 15:16:49,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7785, PETRI_PLACES=325, PETRI_TRANSITIONS=464} [2024-06-20 15:16:49,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-20 15:16:49,309 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 464 transitions, 7785 flow [2024-06-20 15:16:49,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:49,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:49,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:49,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:16:49,310 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:49,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:49,310 INFO L85 PathProgramCache]: Analyzing trace with hash 641162548, now seen corresponding path program 1 times [2024-06-20 15:16:49,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:49,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682065519] [2024-06-20 15:16:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:49,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:49,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:49,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682065519] [2024-06-20 15:16:49,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682065519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:49,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:49,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:49,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250989797] [2024-06-20 15:16:49,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:49,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:49,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:49,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:49,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:49,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:49,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 464 transitions, 7785 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:49,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:49,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:49,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:50,666 INFO L124 PetriNetUnfolderBase]: 3653/6280 cut-off events. [2024-06-20 15:16:50,666 INFO L125 PetriNetUnfolderBase]: For 661404/661408 co-relation queries the response was YES. [2024-06-20 15:16:50,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50647 conditions, 6280 events. 3653/6280 cut-off events. For 661404/661408 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43730 event pairs, 1123 based on Foata normal form. 2/6277 useless extension candidates. Maximal degree in co-relation 50495. Up to 5545 conditions per place. [2024-06-20 15:16:50,749 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 359 selfloop transitions, 118 changer transitions 0/484 dead transitions. [2024-06-20 15:16:50,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 484 transitions, 8825 flow [2024-06-20 15:16:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:16:50,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-20 15:16:50,750 INFO L175 Difference]: Start difference. First operand has 325 places, 464 transitions, 7785 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:16:50,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 484 transitions, 8825 flow [2024-06-20 15:16:54,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 484 transitions, 8661 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:54,260 INFO L231 Difference]: Finished difference. Result has 328 places, 464 transitions, 7875 flow [2024-06-20 15:16:54,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7625, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7875, PETRI_PLACES=328, PETRI_TRANSITIONS=464} [2024-06-20 15:16:54,261 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-20 15:16:54,261 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 464 transitions, 7875 flow [2024-06-20 15:16:54,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:54,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:54,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:54,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:16:54,261 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:54,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:54,262 INFO L85 PathProgramCache]: Analyzing trace with hash -60534925, now seen corresponding path program 1 times [2024-06-20 15:16:54,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:54,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066108545] [2024-06-20 15:16:54,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:54,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:54,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:54,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066108545] [2024-06-20 15:16:54,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066108545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:54,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:54,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:54,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166497581] [2024-06-20 15:16:54,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:54,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:54,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:54,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:54,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:54,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:54,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 464 transitions, 7875 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) [2024-06-20 15:16:54,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:54,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:54,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:55,599 INFO L124 PetriNetUnfolderBase]: 3674/6314 cut-off events. [2024-06-20 15:16:55,600 INFO L125 PetriNetUnfolderBase]: For 655656/655663 co-relation queries the response was YES. [2024-06-20 15:16:55,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50907 conditions, 6314 events. 3674/6314 cut-off events. For 655656/655663 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44052 event pairs, 1020 based on Foata normal form. 8/6319 useless extension candidates. Maximal degree in co-relation 50754. Up to 5422 conditions per place. [2024-06-20 15:16:55,689 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 365 selfloop transitions, 124 changer transitions 0/496 dead transitions. [2024-06-20 15:16:55,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 496 transitions, 9239 flow [2024-06-20 15:16:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-20 15:16:55,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-20 15:16:55,691 INFO L175 Difference]: Start difference. First operand has 328 places, 464 transitions, 7875 flow. Second operand 9 states and 209 transitions. [2024-06-20 15:16:55,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 496 transitions, 9239 flow [2024-06-20 15:16:58,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 496 transitions, 8894 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:58,682 INFO L231 Difference]: Finished difference. Result has 330 places, 468 transitions, 7927 flow [2024-06-20 15:16:58,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7530, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7927, PETRI_PLACES=330, PETRI_TRANSITIONS=468} [2024-06-20 15:16:58,683 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-20 15:16:58,683 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 468 transitions, 7927 flow [2024-06-20 15:16:58,683 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) [2024-06-20 15:16:58,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:58,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:58,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:16:58,683 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:16:58,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:58,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1086128253, now seen corresponding path program 2 times [2024-06-20 15:16:58,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:58,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221805516] [2024-06-20 15:16:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:58,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:58,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:58,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221805516] [2024-06-20 15:16:58,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221805516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:58,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:58,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:16:58,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520047664] [2024-06-20 15:16:58,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:58,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:16:58,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:58,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:16:58,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:16:58,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:58,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 468 transitions, 7927 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) [2024-06-20 15:16:58,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:58,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:58,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:00,027 INFO L124 PetriNetUnfolderBase]: 3669/6305 cut-off events. [2024-06-20 15:17:00,027 INFO L125 PetriNetUnfolderBase]: For 664895/664902 co-relation queries the response was YES. [2024-06-20 15:17:00,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50992 conditions, 6305 events. 3669/6305 cut-off events. For 664895/664902 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 43941 event pairs, 1113 based on Foata normal form. 8/6308 useless extension candidates. Maximal degree in co-relation 50838. Up to 5588 conditions per place. [2024-06-20 15:17:00,114 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 374 selfloop transitions, 107 changer transitions 0/488 dead transitions. [2024-06-20 15:17:00,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 488 transitions, 8937 flow [2024-06-20 15:17:00,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:17:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:17:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-20 15:17:00,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 15:17:00,115 INFO L175 Difference]: Start difference. First operand has 330 places, 468 transitions, 7927 flow. Second operand 9 states and 201 transitions. [2024-06-20 15:17:00,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 488 transitions, 8937 flow [2024-06-20 15:17:03,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 488 transitions, 8702 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:03,047 INFO L231 Difference]: Finished difference. Result has 333 places, 468 transitions, 7915 flow [2024-06-20 15:17:03,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7692, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7915, PETRI_PLACES=333, PETRI_TRANSITIONS=468} [2024-06-20 15:17:03,047 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-20 15:17:03,047 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 468 transitions, 7915 flow [2024-06-20 15:17:03,047 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) [2024-06-20 15:17:03,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:03,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:03,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:17:03,048 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:03,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash -233172778, now seen corresponding path program 2 times [2024-06-20 15:17:03,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:03,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697937126] [2024-06-20 15:17:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:03,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:03,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:03,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697937126] [2024-06-20 15:17:03,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697937126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:03,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:03,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:03,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892159487] [2024-06-20 15:17:03,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:03,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:03,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:03,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:03,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:03,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:03,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 468 transitions, 7915 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:03,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:03,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:03,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:04,399 INFO L124 PetriNetUnfolderBase]: 3674/6313 cut-off events. [2024-06-20 15:17:04,399 INFO L125 PetriNetUnfolderBase]: For 662555/662559 co-relation queries the response was YES. [2024-06-20 15:17:04,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51086 conditions, 6313 events. 3674/6313 cut-off events. For 662555/662559 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 43960 event pairs, 1123 based on Foata normal form. 2/6310 useless extension candidates. Maximal degree in co-relation 50931. Up to 5388 conditions per place. [2024-06-20 15:17:04,487 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 310 selfloop transitions, 185 changer transitions 0/502 dead transitions. [2024-06-20 15:17:04,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 502 transitions, 9195 flow [2024-06-20 15:17:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:17:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:17:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-20 15:17:04,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727272727272728 [2024-06-20 15:17:04,489 INFO L175 Difference]: Start difference. First operand has 333 places, 468 transitions, 7915 flow. Second operand 11 states and 252 transitions. [2024-06-20 15:17:04,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 502 transitions, 9195 flow [2024-06-20 15:17:07,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 502 transitions, 8923 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-20 15:17:07,683 INFO L231 Difference]: Finished difference. Result has 335 places, 471 transitions, 8075 flow [2024-06-20 15:17:07,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7645, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8075, PETRI_PLACES=335, PETRI_TRANSITIONS=471} [2024-06-20 15:17:07,683 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-20 15:17:07,684 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 471 transitions, 8075 flow [2024-06-20 15:17:07,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:07,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:07,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:07,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:17:07,684 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:07,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1095389286, now seen corresponding path program 3 times [2024-06-20 15:17:07,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:07,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320717255] [2024-06-20 15:17:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:07,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:07,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:07,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320717255] [2024-06-20 15:17:07,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320717255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:07,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:07,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:07,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494831983] [2024-06-20 15:17:07,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:07,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:07,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:07,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:07,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:07,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:07,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 471 transitions, 8075 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:07,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:07,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:07,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:09,010 INFO L124 PetriNetUnfolderBase]: 3679/6322 cut-off events. [2024-06-20 15:17:09,010 INFO L125 PetriNetUnfolderBase]: For 663074/663078 co-relation queries the response was YES. [2024-06-20 15:17:09,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51287 conditions, 6322 events. 3679/6322 cut-off events. For 663074/663078 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 44021 event pairs, 1123 based on Foata normal form. 2/6319 useless extension candidates. Maximal degree in co-relation 51132. Up to 5394 conditions per place. [2024-06-20 15:17:09,094 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 296 selfloop transitions, 195 changer transitions 0/498 dead transitions. [2024-06-20 15:17:09,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 498 transitions, 9335 flow [2024-06-20 15:17:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-20 15:17:09,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-20 15:17:09,095 INFO L175 Difference]: Start difference. First operand has 335 places, 471 transitions, 8075 flow. Second operand 10 states and 227 transitions. [2024-06-20 15:17:09,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 498 transitions, 9335 flow [2024-06-20 15:17:12,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 498 transitions, 8935 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 15:17:12,146 INFO L231 Difference]: Finished difference. Result has 336 places, 474 transitions, 8131 flow [2024-06-20 15:17:12,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7681, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8131, PETRI_PLACES=336, PETRI_TRANSITIONS=474} [2024-06-20 15:17:12,146 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-20 15:17:12,147 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 474 transitions, 8131 flow [2024-06-20 15:17:12,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:12,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:12,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:12,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:17:12,147 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:12,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:12,148 INFO L85 PathProgramCache]: Analyzing trace with hash -57684568, now seen corresponding path program 4 times [2024-06-20 15:17:12,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:12,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333857455] [2024-06-20 15:17:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:12,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:12,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:12,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333857455] [2024-06-20 15:17:12,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333857455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:12,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:12,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:12,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716665034] [2024-06-20 15:17:12,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:12,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:12,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:12,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:12,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:12,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 474 transitions, 8131 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:12,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:12,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:12,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:13,510 INFO L124 PetriNetUnfolderBase]: 3684/6327 cut-off events. [2024-06-20 15:17:13,510 INFO L125 PetriNetUnfolderBase]: For 678888/678892 co-relation queries the response was YES. [2024-06-20 15:17:13,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51530 conditions, 6327 events. 3684/6327 cut-off events. For 678888/678892 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44125 event pairs, 1121 based on Foata normal form. 2/6324 useless extension candidates. Maximal degree in co-relation 51374. Up to 5400 conditions per place. [2024-06-20 15:17:13,602 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 294 selfloop transitions, 199 changer transitions 0/500 dead transitions. [2024-06-20 15:17:13,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 500 transitions, 9393 flow [2024-06-20 15:17:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:17:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:17:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-20 15:17:13,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479166666666667 [2024-06-20 15:17:13,604 INFO L175 Difference]: Start difference. First operand has 336 places, 474 transitions, 8131 flow. Second operand 12 states and 263 transitions. [2024-06-20 15:17:13,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 500 transitions, 9393 flow [2024-06-20 15:17:16,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 500 transitions, 8973 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:16,883 INFO L231 Difference]: Finished difference. Result has 340 places, 477 transitions, 8175 flow [2024-06-20 15:17:16,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7717, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8175, PETRI_PLACES=340, PETRI_TRANSITIONS=477} [2024-06-20 15:17:16,883 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-20 15:17:16,884 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 477 transitions, 8175 flow [2024-06-20 15:17:16,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:16,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:16,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:16,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:17:16,884 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:16,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash -57673408, now seen corresponding path program 5 times [2024-06-20 15:17:16,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:16,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667601931] [2024-06-20 15:17:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:16,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:16,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:16,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667601931] [2024-06-20 15:17:16,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667601931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:16,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:16,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:16,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703723145] [2024-06-20 15:17:16,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:16,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:16,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:16,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:16,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:17,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:17,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 477 transitions, 8175 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:17,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:17,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:17,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:18,211 INFO L124 PetriNetUnfolderBase]: 3681/6327 cut-off events. [2024-06-20 15:17:18,212 INFO L125 PetriNetUnfolderBase]: For 690585/690589 co-relation queries the response was YES. [2024-06-20 15:17:18,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51590 conditions, 6327 events. 3681/6327 cut-off events. For 690585/690589 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44154 event pairs, 1123 based on Foata normal form. 2/6324 useless extension candidates. Maximal degree in co-relation 51433. Up to 5397 conditions per place. [2024-06-20 15:17:18,298 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 197 changer transitions 0/497 dead transitions. [2024-06-20 15:17:18,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 497 transitions, 9203 flow [2024-06-20 15:17:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-20 15:17:18,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-20 15:17:18,300 INFO L175 Difference]: Start difference. First operand has 340 places, 477 transitions, 8175 flow. Second operand 10 states and 226 transitions. [2024-06-20 15:17:18,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 497 transitions, 9203 flow [2024-06-20 15:17:21,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 497 transitions, 8612 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-20 15:17:21,725 INFO L231 Difference]: Finished difference. Result has 339 places, 477 transitions, 7985 flow [2024-06-20 15:17:21,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7584, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7985, PETRI_PLACES=339, PETRI_TRANSITIONS=477} [2024-06-20 15:17:21,725 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-20 15:17:21,726 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 477 transitions, 7985 flow [2024-06-20 15:17:21,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:21,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:21,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:21,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:17:21,726 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:21,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:21,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1883196275, now seen corresponding path program 3 times [2024-06-20 15:17:21,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:21,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426613570] [2024-06-20 15:17:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:21,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:21,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:21,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426613570] [2024-06-20 15:17:21,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426613570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:21,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:21,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:21,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061153700] [2024-06-20 15:17:21,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:21,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:21,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:21,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:21,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:21,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:21,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 477 transitions, 7985 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) [2024-06-20 15:17:21,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:21,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:21,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:23,056 INFO L124 PetriNetUnfolderBase]: 3748/6422 cut-off events. [2024-06-20 15:17:23,056 INFO L125 PetriNetUnfolderBase]: For 747181/747188 co-relation queries the response was YES. [2024-06-20 15:17:23,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53304 conditions, 6422 events. 3748/6422 cut-off events. For 747181/747188 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 44841 event pairs, 1124 based on Foata normal form. 8/6427 useless extension candidates. Maximal degree in co-relation 53146. Up to 5550 conditions per place. [2024-06-20 15:17:23,149 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 346 selfloop transitions, 158 changer transitions 0/511 dead transitions. [2024-06-20 15:17:23,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 511 transitions, 9401 flow [2024-06-20 15:17:23,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:23,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:17:23,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-20 15:17:23,150 INFO L175 Difference]: Start difference. First operand has 339 places, 477 transitions, 7985 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:17:23,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 511 transitions, 9401 flow [2024-06-20 15:17:26,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 511 transitions, 9007 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 15:17:26,306 INFO L231 Difference]: Finished difference. Result has 338 places, 481 transitions, 8060 flow [2024-06-20 15:17:26,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7591, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8060, PETRI_PLACES=338, PETRI_TRANSITIONS=481} [2024-06-20 15:17:26,307 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-20 15:17:26,307 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 481 transitions, 8060 flow [2024-06-20 15:17:26,307 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) [2024-06-20 15:17:26,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:26,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:26,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:17:26,307 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:26,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1387804547, now seen corresponding path program 4 times [2024-06-20 15:17:26,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:26,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957804259] [2024-06-20 15:17:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:26,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:26,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:26,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957804259] [2024-06-20 15:17:26,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957804259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:26,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:26,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:26,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935269024] [2024-06-20 15:17:26,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:26,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:26,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:26,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:26,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:26,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:26,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 481 transitions, 8060 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) [2024-06-20 15:17:26,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:26,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:26,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:27,655 INFO L124 PetriNetUnfolderBase]: 3756/6439 cut-off events. [2024-06-20 15:17:27,655 INFO L125 PetriNetUnfolderBase]: For 765406/765413 co-relation queries the response was YES. [2024-06-20 15:17:27,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53694 conditions, 6439 events. 3756/6439 cut-off events. For 765406/765413 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44961 event pairs, 1131 based on Foata normal form. 8/6444 useless extension candidates. Maximal degree in co-relation 53535. Up to 5651 conditions per place. [2024-06-20 15:17:27,893 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 343 selfloop transitions, 155 changer transitions 0/505 dead transitions. [2024-06-20 15:17:27,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 505 transitions, 9186 flow [2024-06-20 15:17:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:17:27,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:17:27,894 INFO L175 Difference]: Start difference. First operand has 338 places, 481 transitions, 8060 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:17:27,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 505 transitions, 9186 flow [2024-06-20 15:17:31,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 505 transitions, 8898 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-20 15:17:31,031 INFO L231 Difference]: Finished difference. Result has 342 places, 483 transitions, 8167 flow [2024-06-20 15:17:31,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8167, PETRI_PLACES=342, PETRI_TRANSITIONS=483} [2024-06-20 15:17:31,031 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-20 15:17:31,032 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 483 transitions, 8167 flow [2024-06-20 15:17:31,032 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) [2024-06-20 15:17:31,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:31,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:31,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:17:31,032 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:31,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1031628675, now seen corresponding path program 5 times [2024-06-20 15:17:31,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:31,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397717675] [2024-06-20 15:17:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:31,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:31,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:31,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397717675] [2024-06-20 15:17:31,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397717675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:31,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:31,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:31,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27016515] [2024-06-20 15:17:31,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:31,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:31,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:31,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:31,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 483 transitions, 8167 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) [2024-06-20 15:17:31,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:31,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:31,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:32,422 INFO L124 PetriNetUnfolderBase]: 3856/6591 cut-off events. [2024-06-20 15:17:32,422 INFO L125 PetriNetUnfolderBase]: For 840801/840808 co-relation queries the response was YES. [2024-06-20 15:17:32,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56462 conditions, 6591 events. 3856/6591 cut-off events. For 840801/840808 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 46069 event pairs, 1033 based on Foata normal form. 8/6596 useless extension candidates. Maximal degree in co-relation 56301. Up to 5332 conditions per place. [2024-06-20 15:17:32,515 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 333 selfloop transitions, 183 changer transitions 0/523 dead transitions. [2024-06-20 15:17:32,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 523 transitions, 9849 flow [2024-06-20 15:17:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:17:32,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:17:32,516 INFO L175 Difference]: Start difference. First operand has 342 places, 483 transitions, 8167 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:17:32,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 523 transitions, 9849 flow [2024-06-20 15:17:36,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 523 transitions, 9488 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:36,984 INFO L231 Difference]: Finished difference. Result has 344 places, 488 transitions, 8357 flow [2024-06-20 15:17:36,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8357, PETRI_PLACES=344, PETRI_TRANSITIONS=488} [2024-06-20 15:17:36,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-20 15:17:36,984 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 488 transitions, 8357 flow [2024-06-20 15:17:36,985 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) [2024-06-20 15:17:36,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:36,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:36,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:17:36,985 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:36,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1541305203, now seen corresponding path program 6 times [2024-06-20 15:17:36,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:36,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489167154] [2024-06-20 15:17:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:36,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:37,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:37,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489167154] [2024-06-20 15:17:37,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489167154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:37,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:37,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:37,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645145115] [2024-06-20 15:17:37,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:37,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:37,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:37,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:37,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:37,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:37,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 488 transitions, 8357 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) [2024-06-20 15:17:37,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:37,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:37,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:38,488 INFO L124 PetriNetUnfolderBase]: 3864/6607 cut-off events. [2024-06-20 15:17:38,488 INFO L125 PetriNetUnfolderBase]: For 862369/862376 co-relation queries the response was YES. [2024-06-20 15:17:38,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57079 conditions, 6607 events. 3864/6607 cut-off events. For 862369/862376 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46256 event pairs, 1061 based on Foata normal form. 8/6612 useless extension candidates. Maximal degree in co-relation 56917. Up to 5340 conditions per place. [2024-06-20 15:17:38,572 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 326 selfloop transitions, 185 changer transitions 0/518 dead transitions. [2024-06-20 15:17:38,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 518 transitions, 9723 flow [2024-06-20 15:17:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:17:38,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 15:17:38,573 INFO L175 Difference]: Start difference. First operand has 344 places, 488 transitions, 8357 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:17:38,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 518 transitions, 9723 flow [2024-06-20 15:17:42,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 518 transitions, 9423 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-20 15:17:42,177 INFO L231 Difference]: Finished difference. Result has 349 places, 490 transitions, 8512 flow [2024-06-20 15:17:42,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8075, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8512, PETRI_PLACES=349, PETRI_TRANSITIONS=490} [2024-06-20 15:17:42,177 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-20 15:17:42,178 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 490 transitions, 8512 flow [2024-06-20 15:17:42,178 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) [2024-06-20 15:17:42,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:42,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:42,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:17:42,178 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:42,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:42,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1255014933, now seen corresponding path program 7 times [2024-06-20 15:17:42,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:42,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864499501] [2024-06-20 15:17:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:42,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:42,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:42,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864499501] [2024-06-20 15:17:42,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864499501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:42,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:42,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:42,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782102512] [2024-06-20 15:17:42,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:42,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:42,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:42,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:42,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:42,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:42,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 490 transitions, 8512 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) [2024-06-20 15:17:42,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:42,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:42,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:43,603 INFO L124 PetriNetUnfolderBase]: 3872/6619 cut-off events. [2024-06-20 15:17:43,603 INFO L125 PetriNetUnfolderBase]: For 878607/878614 co-relation queries the response was YES. [2024-06-20 15:17:43,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57561 conditions, 6619 events. 3872/6619 cut-off events. For 878607/878614 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 46322 event pairs, 1173 based on Foata normal form. 8/6624 useless extension candidates. Maximal degree in co-relation 57397. Up to 5827 conditions per place. [2024-06-20 15:17:43,698 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 349 selfloop transitions, 155 changer transitions 0/511 dead transitions. [2024-06-20 15:17:43,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 511 transitions, 9640 flow [2024-06-20 15:17:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 15:17:43,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 15:17:43,700 INFO L175 Difference]: Start difference. First operand has 349 places, 490 transitions, 8512 flow. Second operand 8 states and 182 transitions. [2024-06-20 15:17:43,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 511 transitions, 9640 flow [2024-06-20 15:17:48,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 511 transitions, 9273 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 15:17:48,802 INFO L231 Difference]: Finished difference. Result has 352 places, 492 transitions, 8538 flow [2024-06-20 15:17:48,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8147, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8538, PETRI_PLACES=352, PETRI_TRANSITIONS=492} [2024-06-20 15:17:48,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-20 15:17:48,803 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 492 transitions, 8538 flow [2024-06-20 15:17:48,803 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) [2024-06-20 15:17:48,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:48,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:48,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:17:48,804 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:48,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:48,804 INFO L85 PathProgramCache]: Analyzing trace with hash -506372221, now seen corresponding path program 8 times [2024-06-20 15:17:48,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:48,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21028396] [2024-06-20 15:17:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:48,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:48,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:48,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21028396] [2024-06-20 15:17:48,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21028396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:48,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:48,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:17:48,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834953502] [2024-06-20 15:17:48,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:48,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:17:48,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:48,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:17:48,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:17:48,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:48,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 492 transitions, 8538 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) [2024-06-20 15:17:48,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:48,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:48,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:50,243 INFO L124 PetriNetUnfolderBase]: 3880/6629 cut-off events. [2024-06-20 15:17:50,243 INFO L125 PetriNetUnfolderBase]: For 898003/898010 co-relation queries the response was YES. [2024-06-20 15:17:50,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57699 conditions, 6629 events. 3880/6629 cut-off events. For 898003/898010 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46464 event pairs, 1171 based on Foata normal form. 8/6632 useless extension candidates. Maximal degree in co-relation 57534. Up to 5811 conditions per place. [2024-06-20 15:17:50,336 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 345 selfloop transitions, 162 changer transitions 0/514 dead transitions. [2024-06-20 15:17:50,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 514 transitions, 9664 flow [2024-06-20 15:17:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:17:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:17:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:17:50,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 15:17:50,338 INFO L175 Difference]: Start difference. First operand has 352 places, 492 transitions, 8538 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:17:50,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 514 transitions, 9664 flow [2024-06-20 15:17:55,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 514 transitions, 9299 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 15:17:55,227 INFO L231 Difference]: Finished difference. Result has 354 places, 494 transitions, 8570 flow [2024-06-20 15:17:55,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8173, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8570, PETRI_PLACES=354, PETRI_TRANSITIONS=494} [2024-06-20 15:17:55,228 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-20 15:17:55,228 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 494 transitions, 8570 flow [2024-06-20 15:17:55,228 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) [2024-06-20 15:17:55,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:55,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:55,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:17:55,228 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:17:55,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1378543514, now seen corresponding path program 6 times [2024-06-20 15:17:55,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:55,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650254542] [2024-06-20 15:17:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:55,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:55,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650254542] [2024-06-20 15:17:55,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650254542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:55,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:55,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:55,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762730620] [2024-06-20 15:17:55,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:55,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:55,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:55,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:55,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:55,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 494 transitions, 8570 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:55,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:55,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:55,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:56,675 INFO L124 PetriNetUnfolderBase]: 3885/6633 cut-off events. [2024-06-20 15:17:56,675 INFO L125 PetriNetUnfolderBase]: For 912712/912716 co-relation queries the response was YES. [2024-06-20 15:17:56,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57950 conditions, 6633 events. 3885/6633 cut-off events. For 912712/912716 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46344 event pairs, 1184 based on Foata normal form. 2/6630 useless extension candidates. Maximal degree in co-relation 57784. Up to 5527 conditions per place. [2024-06-20 15:17:56,774 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 238 selfloop transitions, 279 changer transitions 0/524 dead transitions. [2024-06-20 15:17:56,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 524 transitions, 10092 flow [2024-06-20 15:17:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:17:56,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:17:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-20 15:17:56,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-20 15:17:56,776 INFO L175 Difference]: Start difference. First operand has 354 places, 494 transitions, 8570 flow. Second operand 9 states and 214 transitions. [2024-06-20 15:17:56,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 524 transitions, 10092 flow [2024-06-20 15:18:01,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 524 transitions, 9717 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:01,479 INFO L231 Difference]: Finished difference. Result has 357 places, 497 transitions, 8825 flow [2024-06-20 15:18:01,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8195, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8825, PETRI_PLACES=357, PETRI_TRANSITIONS=497} [2024-06-20 15:18:01,479 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-20 15:18:01,479 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 497 transitions, 8825 flow [2024-06-20 15:18:01,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:01,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:01,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:01,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:18:01,480 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:01,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:01,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1387809104, now seen corresponding path program 7 times [2024-06-20 15:18:01,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:01,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756420175] [2024-06-20 15:18:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:01,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:01,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756420175] [2024-06-20 15:18:01,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756420175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:01,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:01,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:01,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902720093] [2024-06-20 15:18:01,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:01,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:01,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:01,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:01,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:01,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:01,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 497 transitions, 8825 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:01,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:01,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:01,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:02,907 INFO L124 PetriNetUnfolderBase]: 3898/6659 cut-off events. [2024-06-20 15:18:02,907 INFO L125 PetriNetUnfolderBase]: For 937185/937189 co-relation queries the response was YES. [2024-06-20 15:18:02,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58670 conditions, 6659 events. 3898/6659 cut-off events. For 937185/937189 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46660 event pairs, 1186 based on Foata normal form. 2/6656 useless extension candidates. Maximal degree in co-relation 58503. Up to 5542 conditions per place. [2024-06-20 15:18:03,005 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 239 selfloop transitions, 282 changer transitions 0/528 dead transitions. [2024-06-20 15:18:03,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 528 transitions, 10611 flow [2024-06-20 15:18:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-20 15:18:03,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-20 15:18:03,007 INFO L175 Difference]: Start difference. First operand has 357 places, 497 transitions, 8825 flow. Second operand 9 states and 213 transitions. [2024-06-20 15:18:03,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 528 transitions, 10611 flow [2024-06-20 15:18:07,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 528 transitions, 9808 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-20 15:18:07,944 INFO L231 Difference]: Finished difference. Result has 358 places, 503 transitions, 8736 flow [2024-06-20 15:18:07,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8736, PETRI_PLACES=358, PETRI_TRANSITIONS=503} [2024-06-20 15:18:07,945 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 317 predicate places. [2024-06-20 15:18:07,945 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 503 transitions, 8736 flow [2024-06-20 15:18:07,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:07,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:07,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:07,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:18:07,946 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:07,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:07,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1387797944, now seen corresponding path program 8 times [2024-06-20 15:18:07,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:07,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116823280] [2024-06-20 15:18:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:07,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:08,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:08,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116823280] [2024-06-20 15:18:08,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116823280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:08,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:08,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:08,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953371154] [2024-06-20 15:18:08,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:08,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:08,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:08,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:08,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:08,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:08,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 503 transitions, 8736 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:08,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:08,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:08,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:09,400 INFO L124 PetriNetUnfolderBase]: 3895/6651 cut-off events. [2024-06-20 15:18:09,401 INFO L125 PetriNetUnfolderBase]: For 951305/951309 co-relation queries the response was YES. [2024-06-20 15:18:09,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58609 conditions, 6651 events. 3895/6651 cut-off events. For 951305/951309 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46573 event pairs, 1184 based on Foata normal form. 2/6648 useless extension candidates. Maximal degree in co-relation 58441. Up to 5539 conditions per place. [2024-06-20 15:18:09,499 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 239 selfloop transitions, 283 changer transitions 0/529 dead transitions. [2024-06-20 15:18:09,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 529 transitions, 10206 flow [2024-06-20 15:18:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:09,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-20 15:18:09,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636363636363636 [2024-06-20 15:18:09,500 INFO L175 Difference]: Start difference. First operand has 358 places, 503 transitions, 8736 flow. Second operand 11 states and 248 transitions. [2024-06-20 15:18:09,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 529 transitions, 10206 flow [2024-06-20 15:18:14,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 529 transitions, 9737 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-20 15:18:14,076 INFO L231 Difference]: Finished difference. Result has 364 places, 503 transitions, 8839 flow [2024-06-20 15:18:14,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8267, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8839, PETRI_PLACES=364, PETRI_TRANSITIONS=503} [2024-06-20 15:18:14,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-20 15:18:14,077 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 503 transitions, 8839 flow [2024-06-20 15:18:14,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:14,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:14,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:14,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:18:14,078 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:14,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:14,078 INFO L85 PathProgramCache]: Analyzing trace with hash -502051534, now seen corresponding path program 9 times [2024-06-20 15:18:14,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:14,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789901880] [2024-06-20 15:18:14,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:14,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:14,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:14,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789901880] [2024-06-20 15:18:14,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789901880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:14,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:14,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:14,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094330441] [2024-06-20 15:18:14,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:14,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:14,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:14,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:14,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:14,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:14,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 503 transitions, 8839 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:14,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:14,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:14,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:15,537 INFO L124 PetriNetUnfolderBase]: 3900/6660 cut-off events. [2024-06-20 15:18:15,537 INFO L125 PetriNetUnfolderBase]: For 973020/973024 co-relation queries the response was YES. [2024-06-20 15:18:15,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58920 conditions, 6660 events. 3900/6660 cut-off events. For 973020/973024 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46668 event pairs, 1184 based on Foata normal form. 2/6657 useless extension candidates. Maximal degree in co-relation 58751. Up to 5545 conditions per place. [2024-06-20 15:18:15,638 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 288 changer transitions 0/528 dead transitions. [2024-06-20 15:18:15,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 528 transitions, 10557 flow [2024-06-20 15:18:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-20 15:18:15,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-20 15:18:15,639 INFO L175 Difference]: Start difference. First operand has 364 places, 503 transitions, 8839 flow. Second operand 9 states and 209 transitions. [2024-06-20 15:18:15,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 528 transitions, 10557 flow [2024-06-20 15:18:21,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 528 transitions, 9789 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 15:18:21,559 INFO L231 Difference]: Finished difference. Result has 362 places, 506 transitions, 8725 flow [2024-06-20 15:18:21,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8080, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8725, PETRI_PLACES=362, PETRI_TRANSITIONS=506} [2024-06-20 15:18:21,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-20 15:18:21,560 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 506 transitions, 8725 flow [2024-06-20 15:18:21,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:21,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:21,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:21,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:18:21,560 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:21,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash -514938544, now seen corresponding path program 10 times [2024-06-20 15:18:21,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:21,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829338420] [2024-06-20 15:18:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:21,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:21,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:21,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829338420] [2024-06-20 15:18:21,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829338420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:21,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:21,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:21,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229600764] [2024-06-20 15:18:21,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:21,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:21,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:21,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:21,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 506 transitions, 8725 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:21,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:21,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:21,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:23,195 INFO L124 PetriNetUnfolderBase]: 3905/6669 cut-off events. [2024-06-20 15:18:23,195 INFO L125 PetriNetUnfolderBase]: For 991405/991409 co-relation queries the response was YES. [2024-06-20 15:18:23,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59128 conditions, 6669 events. 3905/6669 cut-off events. For 991405/991409 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 46717 event pairs, 1184 based on Foata normal form. 2/6666 useless extension candidates. Maximal degree in co-relation 58958. Up to 5551 conditions per place. [2024-06-20 15:18:23,284 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 291 changer transitions 0/531 dead transitions. [2024-06-20 15:18:23,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 531 transitions, 10452 flow [2024-06-20 15:18:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-20 15:18:23,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-20 15:18:23,285 INFO L175 Difference]: Start difference. First operand has 362 places, 506 transitions, 8725 flow. Second operand 9 states and 209 transitions. [2024-06-20 15:18:23,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 531 transitions, 10452 flow [2024-06-20 15:18:28,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 531 transitions, 9692 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-20 15:18:28,372 INFO L231 Difference]: Finished difference. Result has 364 places, 509 transitions, 8622 flow [2024-06-20 15:18:28,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7984, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8622, PETRI_PLACES=364, PETRI_TRANSITIONS=509} [2024-06-20 15:18:28,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-20 15:18:28,373 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 509 transitions, 8622 flow [2024-06-20 15:18:28,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:28,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:28,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:28,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:18:28,373 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:28,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:28,374 INFO L85 PathProgramCache]: Analyzing trace with hash -514949704, now seen corresponding path program 11 times [2024-06-20 15:18:28,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:28,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913867297] [2024-06-20 15:18:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:28,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:28,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:28,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913867297] [2024-06-20 15:18:28,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913867297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:28,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:28,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:28,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042970901] [2024-06-20 15:18:28,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:28,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:28,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:28,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:28,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:28,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:28,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 509 transitions, 8622 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:28,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:28,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:28,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:29,901 INFO L124 PetriNetUnfolderBase]: 3902/6665 cut-off events. [2024-06-20 15:18:29,901 INFO L125 PetriNetUnfolderBase]: For 1006793/1006797 co-relation queries the response was YES. [2024-06-20 15:18:29,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58724 conditions, 6665 events. 3902/6665 cut-off events. For 1006793/1006797 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 46741 event pairs, 1184 based on Foata normal form. 2/6662 useless extension candidates. Maximal degree in co-relation 58554. Up to 5548 conditions per place. [2024-06-20 15:18:30,005 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 292 changer transitions 0/532 dead transitions. [2024-06-20 15:18:30,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 532 transitions, 10102 flow [2024-06-20 15:18:30,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:18:30,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:18:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-20 15:18:30,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:18:30,007 INFO L175 Difference]: Start difference. First operand has 364 places, 509 transitions, 8622 flow. Second operand 11 states and 242 transitions. [2024-06-20 15:18:30,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 532 transitions, 10102 flow [2024-06-20 15:18:35,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 532 transitions, 9242 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-20 15:18:35,903 INFO L231 Difference]: Finished difference. Result has 367 places, 509 transitions, 8352 flow [2024-06-20 15:18:35,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7762, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8352, PETRI_PLACES=367, PETRI_TRANSITIONS=509} [2024-06-20 15:18:35,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 326 predicate places. [2024-06-20 15:18:35,903 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 509 transitions, 8352 flow [2024-06-20 15:18:35,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:35,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:35,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:35,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:18:35,904 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:35,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1389278427, now seen corresponding path program 9 times [2024-06-20 15:18:35,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:35,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632990330] [2024-06-20 15:18:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:35,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:36,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:36,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632990330] [2024-06-20 15:18:36,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632990330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:36,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:36,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:36,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023722996] [2024-06-20 15:18:36,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:36,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:36,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:36,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:36,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:36,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:36,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 509 transitions, 8352 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) [2024-06-20 15:18:36,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:36,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:36,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:37,453 INFO L124 PetriNetUnfolderBase]: 3938/6728 cut-off events. [2024-06-20 15:18:37,453 INFO L125 PetriNetUnfolderBase]: For 1067794/1067801 co-relation queries the response was YES. [2024-06-20 15:18:37,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59275 conditions, 6728 events. 3938/6728 cut-off events. For 1067794/1067801 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47260 event pairs, 1176 based on Foata normal form. 16/6741 useless extension candidates. Maximal degree in co-relation 59104. Up to 6040 conditions per place. [2024-06-20 15:18:37,553 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 461 selfloop transitions, 63 changer transitions 0/531 dead transitions. [2024-06-20 15:18:37,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 531 transitions, 9548 flow [2024-06-20 15:18:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-20 15:18:37,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-20 15:18:37,554 INFO L175 Difference]: Start difference. First operand has 367 places, 509 transitions, 8352 flow. Second operand 9 states and 199 transitions. [2024-06-20 15:18:37,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 531 transitions, 9548 flow [2024-06-20 15:18:42,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 531 transitions, 8956 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:42,915 INFO L231 Difference]: Finished difference. Result has 366 places, 511 transitions, 7972 flow [2024-06-20 15:18:42,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7760, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7972, PETRI_PLACES=366, PETRI_TRANSITIONS=511} [2024-06-20 15:18:42,915 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-20 15:18:42,916 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 511 transitions, 7972 flow [2024-06-20 15:18:42,916 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) [2024-06-20 15:18:42,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:42,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:42,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:18:42,916 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:42,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1380707547, now seen corresponding path program 10 times [2024-06-20 15:18:42,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:42,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644054121] [2024-06-20 15:18:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:43,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:43,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644054121] [2024-06-20 15:18:43,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644054121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:43,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:43,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:43,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820914452] [2024-06-20 15:18:43,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:43,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:43,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:43,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:43,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:43,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:43,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 511 transitions, 7972 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) [2024-06-20 15:18:43,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:43,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:43,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:44,469 INFO L124 PetriNetUnfolderBase]: 4020/6844 cut-off events. [2024-06-20 15:18:44,469 INFO L125 PetriNetUnfolderBase]: For 1127089/1127096 co-relation queries the response was YES. [2024-06-20 15:18:44,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60709 conditions, 6844 events. 4020/6844 cut-off events. For 1127089/1127096 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 48076 event pairs, 1180 based on Foata normal form. 16/6853 useless extension candidates. Maximal degree in co-relation 60537. Up to 6018 conditions per place. [2024-06-20 15:18:44,573 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 463 selfloop transitions, 69 changer transitions 0/539 dead transitions. [2024-06-20 15:18:44,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 539 transitions, 9431 flow [2024-06-20 15:18:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-20 15:18:44,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-20 15:18:44,574 INFO L175 Difference]: Start difference. First operand has 366 places, 511 transitions, 7972 flow. Second operand 9 states and 203 transitions. [2024-06-20 15:18:44,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 539 transitions, 9431 flow [2024-06-20 15:18:49,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 539 transitions, 9259 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-20 15:18:49,248 INFO L231 Difference]: Finished difference. Result has 369 places, 514 transitions, 8059 flow [2024-06-20 15:18:49,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7800, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8059, PETRI_PLACES=369, PETRI_TRANSITIONS=514} [2024-06-20 15:18:49,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-20 15:18:49,248 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 514 transitions, 8059 flow [2024-06-20 15:18:49,249 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) [2024-06-20 15:18:49,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:49,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:49,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:18:49,249 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:49,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1203687999, now seen corresponding path program 1 times [2024-06-20 15:18:49,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:49,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104865337] [2024-06-20 15:18:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:49,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:49,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:49,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104865337] [2024-06-20 15:18:49,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104865337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:49,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:49,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:49,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940386529] [2024-06-20 15:18:49,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:49,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:49,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:49,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:49,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:49,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:49,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 514 transitions, 8059 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) [2024-06-20 15:18:49,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:49,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:49,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:50,800 INFO L124 PetriNetUnfolderBase]: 4056/6906 cut-off events. [2024-06-20 15:18:50,800 INFO L125 PetriNetUnfolderBase]: For 1149887/1149894 co-relation queries the response was YES. [2024-06-20 15:18:50,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61393 conditions, 6906 events. 4056/6906 cut-off events. For 1149887/1149894 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 48584 event pairs, 1210 based on Foata normal form. 16/6919 useless extension candidates. Maximal degree in co-relation 61219. Up to 6222 conditions per place. [2024-06-20 15:18:50,911 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 466 selfloop transitions, 63 changer transitions 0/536 dead transitions. [2024-06-20 15:18:50,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 536 transitions, 9231 flow [2024-06-20 15:18:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-20 15:18:50,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-20 15:18:50,913 INFO L175 Difference]: Start difference. First operand has 369 places, 514 transitions, 8059 flow. Second operand 9 states and 199 transitions. [2024-06-20 15:18:50,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 536 transitions, 9231 flow [2024-06-20 15:18:55,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 536 transitions, 9063 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:55,714 INFO L231 Difference]: Finished difference. Result has 372 places, 516 transitions, 8069 flow [2024-06-20 15:18:55,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7891, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8069, PETRI_PLACES=372, PETRI_TRANSITIONS=516} [2024-06-20 15:18:55,715 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-06-20 15:18:55,715 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 516 transitions, 8069 flow [2024-06-20 15:18:55,715 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) [2024-06-20 15:18:55,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:55,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:55,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:18:55,716 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:55,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:55,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1203212769, now seen corresponding path program 2 times [2024-06-20 15:18:55,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:55,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559400326] [2024-06-20 15:18:55,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:55,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:55,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:55,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559400326] [2024-06-20 15:18:55,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559400326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:55,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:55,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:18:55,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452488490] [2024-06-20 15:18:55,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:55,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:18:55,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:55,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:18:55,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:18:55,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:55,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 516 transitions, 8069 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) [2024-06-20 15:18:55,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:55,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:55,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:57,367 INFO L124 PetriNetUnfolderBase]: 4138/7028 cut-off events. [2024-06-20 15:18:57,367 INFO L125 PetriNetUnfolderBase]: For 1212429/1212436 co-relation queries the response was YES. [2024-06-20 15:18:57,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63166 conditions, 7028 events. 4138/7028 cut-off events. For 1212429/1212436 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 49533 event pairs, 1216 based on Foata normal form. 16/7041 useless extension candidates. Maximal degree in co-relation 62991. Up to 6164 conditions per place. [2024-06-20 15:18:57,462 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 469 selfloop transitions, 68 changer transitions 0/544 dead transitions. [2024-06-20 15:18:57,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 544 transitions, 9517 flow [2024-06-20 15:18:57,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:18:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:18:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-20 15:18:57,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-20 15:18:57,463 INFO L175 Difference]: Start difference. First operand has 372 places, 516 transitions, 8069 flow. Second operand 9 states and 203 transitions. [2024-06-20 15:18:57,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 544 transitions, 9517 flow [2024-06-20 15:19:03,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 544 transitions, 9363 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:19:03,042 INFO L231 Difference]: Finished difference. Result has 374 places, 519 transitions, 8130 flow [2024-06-20 15:19:03,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7915, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8130, PETRI_PLACES=374, PETRI_TRANSITIONS=519} [2024-06-20 15:19:03,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-20 15:19:03,042 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 519 transitions, 8130 flow [2024-06-20 15:19:03,043 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) [2024-06-20 15:19:03,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:03,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:03,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:19:03,043 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:03,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:03,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1389273870, now seen corresponding path program 12 times [2024-06-20 15:19:03,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:03,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261566252] [2024-06-20 15:19:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:03,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:03,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:03,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261566252] [2024-06-20 15:19:03,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261566252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:03,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:03,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:03,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804088720] [2024-06-20 15:19:03,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:03,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:03,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:03,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:03,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:03,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 519 transitions, 8130 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:03,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:03,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:03,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:04,652 INFO L124 PetriNetUnfolderBase]: 4143/7038 cut-off events. [2024-06-20 15:19:04,652 INFO L125 PetriNetUnfolderBase]: For 1192714/1192718 co-relation queries the response was YES. [2024-06-20 15:19:04,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63492 conditions, 7038 events. 4143/7038 cut-off events. For 1192714/1192718 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 49644 event pairs, 1248 based on Foata normal form. 2/7035 useless extension candidates. Maximal degree in co-relation 63316. Up to 6259 conditions per place. [2024-06-20 15:19:04,759 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 419 selfloop transitions, 115 changer transitions 0/541 dead transitions. [2024-06-20 15:19:04,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 541 transitions, 9701 flow [2024-06-20 15:19:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:19:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:19:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-20 15:19:04,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-20 15:19:04,760 INFO L175 Difference]: Start difference. First operand has 374 places, 519 transitions, 8130 flow. Second operand 10 states and 223 transitions. [2024-06-20 15:19:04,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 541 transitions, 9701 flow [2024-06-20 15:19:10,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 541 transitions, 9584 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:10,983 INFO L231 Difference]: Finished difference. Result has 379 places, 522 transitions, 8312 flow [2024-06-20 15:19:10,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8013, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8312, PETRI_PLACES=379, PETRI_TRANSITIONS=522} [2024-06-20 15:19:10,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-20 15:19:10,984 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 522 transitions, 8312 flow [2024-06-20 15:19:10,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:10,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:10,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:10,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:19:10,985 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:10,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:10,985 INFO L85 PathProgramCache]: Analyzing trace with hash -891036342, now seen corresponding path program 13 times [2024-06-20 15:19:10,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:10,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653250505] [2024-06-20 15:19:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:10,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:11,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:11,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653250505] [2024-06-20 15:19:11,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653250505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:11,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:11,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:11,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545342331] [2024-06-20 15:19:11,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:11,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:11,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:11,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:11,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:11,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:11,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 522 transitions, 8312 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:11,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:11,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:11,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:12,623 INFO L124 PetriNetUnfolderBase]: 4140/7034 cut-off events. [2024-06-20 15:19:12,624 INFO L125 PetriNetUnfolderBase]: For 1210095/1210099 co-relation queries the response was YES. [2024-06-20 15:19:12,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63623 conditions, 7034 events. 4140/7034 cut-off events. For 1210095/1210099 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 49605 event pairs, 1248 based on Foata normal form. 2/7031 useless extension candidates. Maximal degree in co-relation 63445. Up to 6256 conditions per place. [2024-06-20 15:19:12,740 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 419 selfloop transitions, 116 changer transitions 0/542 dead transitions. [2024-06-20 15:19:12,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 542 transitions, 9628 flow [2024-06-20 15:19:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:19:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:19:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-20 15:19:12,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-06-20 15:19:12,742 INFO L175 Difference]: Start difference. First operand has 379 places, 522 transitions, 8312 flow. Second operand 12 states and 257 transitions. [2024-06-20 15:19:12,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 542 transitions, 9628 flow [2024-06-20 15:19:19,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 542 transitions, 9288 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-20 15:19:19,434 INFO L231 Difference]: Finished difference. Result has 383 places, 522 transitions, 8210 flow [2024-06-20 15:19:19,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7972, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8210, PETRI_PLACES=383, PETRI_TRANSITIONS=522} [2024-06-20 15:19:19,434 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-20 15:19:19,434 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 522 transitions, 8210 flow [2024-06-20 15:19:19,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:19,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:19,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:19,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:19:19,435 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:19,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:19,435 INFO L85 PathProgramCache]: Analyzing trace with hash -719256042, now seen corresponding path program 14 times [2024-06-20 15:19:19,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:19,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576784399] [2024-06-20 15:19:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:19,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:19,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576784399] [2024-06-20 15:19:19,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576784399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:19,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:19,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:19,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914685836] [2024-06-20 15:19:19,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:19,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:19,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:19,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:19,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 522 transitions, 8210 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:19,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:19,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:19,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:21,118 INFO L124 PetriNetUnfolderBase]: 4145/7047 cut-off events. [2024-06-20 15:19:21,119 INFO L125 PetriNetUnfolderBase]: For 1232560/1232564 co-relation queries the response was YES. [2024-06-20 15:19:21,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63847 conditions, 7047 events. 4145/7047 cut-off events. For 1232560/1232564 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49794 event pairs, 1248 based on Foata normal form. 2/7044 useless extension candidates. Maximal degree in co-relation 63668. Up to 6262 conditions per place. [2024-06-20 15:19:21,218 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 418 selfloop transitions, 118 changer transitions 0/543 dead transitions. [2024-06-20 15:19:21,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 543 transitions, 9593 flow [2024-06-20 15:19:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:19:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:19:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-20 15:19:21,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-20 15:19:21,220 INFO L175 Difference]: Start difference. First operand has 383 places, 522 transitions, 8210 flow. Second operand 10 states and 222 transitions. [2024-06-20 15:19:21,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 543 transitions, 9593 flow [2024-06-20 15:19:28,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 543 transitions, 9347 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 15:19:28,441 INFO L231 Difference]: Finished difference. Result has 382 places, 525 transitions, 8273 flow [2024-06-20 15:19:28,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7970, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8273, PETRI_PLACES=382, PETRI_TRANSITIONS=525} [2024-06-20 15:19:28,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-20 15:19:28,442 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 525 transitions, 8273 flow [2024-06-20 15:19:28,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:28,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:28,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:28,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:19:28,442 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:28,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1217510310, now seen corresponding path program 15 times [2024-06-20 15:19:28,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:28,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579546977] [2024-06-20 15:19:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:28,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:28,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:28,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579546977] [2024-06-20 15:19:28,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579546977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:28,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:28,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:28,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155772032] [2024-06-20 15:19:28,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:28,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:28,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:28,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:28,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:28,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:28,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 525 transitions, 8273 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:28,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:28,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:28,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:30,055 INFO L124 PetriNetUnfolderBase]: 4142/7039 cut-off events. [2024-06-20 15:19:30,055 INFO L125 PetriNetUnfolderBase]: For 1251263/1251267 co-relation queries the response was YES. [2024-06-20 15:19:30,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63931 conditions, 7039 events. 4142/7039 cut-off events. For 1251263/1251267 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49666 event pairs, 1246 based on Foata normal form. 2/7036 useless extension candidates. Maximal degree in co-relation 63751. Up to 6259 conditions per place. [2024-06-20 15:19:30,162 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 418 selfloop transitions, 119 changer transitions 0/544 dead transitions. [2024-06-20 15:19:30,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 544 transitions, 9391 flow [2024-06-20 15:19:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:19:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:19:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-06-20 15:19:30,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-20 15:19:30,163 INFO L175 Difference]: Start difference. First operand has 382 places, 525 transitions, 8273 flow. Second operand 12 states and 256 transitions. [2024-06-20 15:19:30,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 544 transitions, 9391 flow [2024-06-20 15:19:37,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 544 transitions, 9052 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-20 15:19:37,780 INFO L231 Difference]: Finished difference. Result has 386 places, 525 transitions, 8178 flow [2024-06-20 15:19:37,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7934, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8178, PETRI_PLACES=386, PETRI_TRANSITIONS=525} [2024-06-20 15:19:37,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-20 15:19:37,781 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 525 transitions, 8178 flow [2024-06-20 15:19:37,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:37,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:37,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:37,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:19:37,781 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:37,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:37,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1084908621, now seen corresponding path program 11 times [2024-06-20 15:19:37,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:37,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192023257] [2024-06-20 15:19:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:37,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:37,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:37,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192023257] [2024-06-20 15:19:37,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192023257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:37,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:37,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:37,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696932825] [2024-06-20 15:19:37,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:37,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:37,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:37,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:37,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:37,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:37,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 525 transitions, 8178 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) [2024-06-20 15:19:37,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:37,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:37,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:39,472 INFO L124 PetriNetUnfolderBase]: 4119/7008 cut-off events. [2024-06-20 15:19:39,472 INFO L125 PetriNetUnfolderBase]: For 1268277/1268284 co-relation queries the response was YES. [2024-06-20 15:19:39,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62794 conditions, 7008 events. 4119/7008 cut-off events. For 1268277/1268284 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 49542 event pairs, 1224 based on Foata normal form. 16/7021 useless extension candidates. Maximal degree in co-relation 62613. Up to 6152 conditions per place. [2024-06-20 15:19:39,585 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 414 selfloop transitions, 133 changer transitions 0/554 dead transitions. [2024-06-20 15:19:39,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 554 transitions, 9368 flow [2024-06-20 15:19:39,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-20 15:19:39,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-20 15:19:39,586 INFO L175 Difference]: Start difference. First operand has 386 places, 525 transitions, 8178 flow. Second operand 9 states and 211 transitions. [2024-06-20 15:19:39,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 554 transitions, 9368 flow [2024-06-20 15:19:47,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 554 transitions, 9082 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-20 15:19:47,022 INFO L231 Difference]: Finished difference. Result has 384 places, 525 transitions, 8171 flow [2024-06-20 15:19:47,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7892, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8171, PETRI_PLACES=384, PETRI_TRANSITIONS=525} [2024-06-20 15:19:47,022 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-20 15:19:47,022 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 525 transitions, 8171 flow [2024-06-20 15:19:47,022 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) [2024-06-20 15:19:47,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:47,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:47,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:19:47,023 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:47,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1076337741, now seen corresponding path program 12 times [2024-06-20 15:19:47,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:47,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024653777] [2024-06-20 15:19:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:47,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:47,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:47,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024653777] [2024-06-20 15:19:47,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024653777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:47,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:47,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:47,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363364763] [2024-06-20 15:19:47,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:47,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:47,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:47,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:47,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:47,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 525 transitions, 8171 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) [2024-06-20 15:19:47,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:47,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:47,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:48,736 INFO L124 PetriNetUnfolderBase]: 4096/6976 cut-off events. [2024-06-20 15:19:48,737 INFO L125 PetriNetUnfolderBase]: For 1237344/1237351 co-relation queries the response was YES. [2024-06-20 15:19:48,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61761 conditions, 6976 events. 4096/6976 cut-off events. For 1237344/1237351 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49276 event pairs, 1073 based on Foata normal form. 16/6989 useless extension candidates. Maximal degree in co-relation 61579. Up to 5734 conditions per place. [2024-06-20 15:19:48,846 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 398 selfloop transitions, 154 changer transitions 0/559 dead transitions. [2024-06-20 15:19:48,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 559 transitions, 9615 flow [2024-06-20 15:19:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:19:48,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-20 15:19:48,848 INFO L175 Difference]: Start difference. First operand has 384 places, 525 transitions, 8171 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:19:48,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 559 transitions, 9615 flow [2024-06-20 15:19:56,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 559 transitions, 9291 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-20 15:19:56,168 INFO L231 Difference]: Finished difference. Result has 385 places, 525 transitions, 8168 flow [2024-06-20 15:19:56,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7849, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8168, PETRI_PLACES=385, PETRI_TRANSITIONS=525} [2024-06-20 15:19:56,168 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-20 15:19:56,168 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 525 transitions, 8168 flow [2024-06-20 15:19:56,169 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) [2024-06-20 15:19:56,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:56,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:56,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:19:56,169 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:56,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:56,169 INFO L85 PathProgramCache]: Analyzing trace with hash -913127763, now seen corresponding path program 3 times [2024-06-20 15:19:56,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:56,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511903556] [2024-06-20 15:19:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:56,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:56,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:56,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511903556] [2024-06-20 15:19:56,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511903556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:56,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:56,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:56,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653038062] [2024-06-20 15:19:56,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:56,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:56,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:56,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:56,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:56,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 525 transitions, 8168 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) [2024-06-20 15:19:56,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:56,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:56,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:58,060 INFO L124 PetriNetUnfolderBase]: 4132/7028 cut-off events. [2024-06-20 15:19:58,061 INFO L125 PetriNetUnfolderBase]: For 1240025/1240032 co-relation queries the response was YES. [2024-06-20 15:19:58,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62299 conditions, 7028 events. 4132/7028 cut-off events. For 1240025/1240032 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 49617 event pairs, 1224 based on Foata normal form. 16/7041 useless extension candidates. Maximal degree in co-relation 62116. Up to 6193 conditions per place. [2024-06-20 15:19:58,161 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 416 selfloop transitions, 127 changer transitions 0/550 dead transitions. [2024-06-20 15:19:58,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 550 transitions, 9384 flow [2024-06-20 15:19:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:58,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-20 15:19:58,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 15:19:58,162 INFO L175 Difference]: Start difference. First operand has 385 places, 525 transitions, 8168 flow. Second operand 9 states and 204 transitions. [2024-06-20 15:19:58,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 550 transitions, 9384 flow [2024-06-20 15:20:05,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 550 transitions, 8984 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 15:20:05,464 INFO L231 Difference]: Finished difference. Result has 385 places, 527 transitions, 8086 flow [2024-06-20 15:20:05,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7768, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8086, PETRI_PLACES=385, PETRI_TRANSITIONS=527} [2024-06-20 15:20:05,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-20 15:20:05,465 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 527 transitions, 8086 flow [2024-06-20 15:20:05,465 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) [2024-06-20 15:20:05,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:05,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:05,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:20:05,466 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:05,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1868504883, now seen corresponding path program 4 times [2024-06-20 15:20:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335767315] [2024-06-20 15:20:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:05,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:05,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:05,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335767315] [2024-06-20 15:20:05,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335767315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:05,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:05,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:05,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517597801] [2024-06-20 15:20:05,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:05,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:05,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:05,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:05,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:05,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 527 transitions, 8086 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) [2024-06-20 15:20:05,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:05,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:05,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:07,485 INFO L124 PetriNetUnfolderBase]: 4214/7148 cut-off events. [2024-06-20 15:20:07,486 INFO L125 PetriNetUnfolderBase]: For 1284512/1284519 co-relation queries the response was YES. [2024-06-20 15:20:07,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63888 conditions, 7148 events. 4214/7148 cut-off events. For 1284512/1284519 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 50486 event pairs, 1212 based on Foata normal form. 16/7161 useless extension candidates. Maximal degree in co-relation 63704. Up to 5919 conditions per place. [2024-06-20 15:20:07,585 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 412 selfloop transitions, 139 changer transitions 0/558 dead transitions. [2024-06-20 15:20:07,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 558 transitions, 9594 flow [2024-06-20 15:20:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:07,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:20:07,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-20 15:20:07,586 INFO L175 Difference]: Start difference. First operand has 385 places, 527 transitions, 8086 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:20:07,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 558 transitions, 9594 flow [2024-06-20 15:20:14,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 558 transitions, 9314 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:14,969 INFO L231 Difference]: Finished difference. Result has 387 places, 530 transitions, 8178 flow [2024-06-20 15:20:14,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8178, PETRI_PLACES=387, PETRI_TRANSITIONS=530} [2024-06-20 15:20:14,970 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-20 15:20:14,970 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 530 transitions, 8178 flow [2024-06-20 15:20:14,970 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) [2024-06-20 15:20:14,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:14,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:14,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:20:14,970 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:14,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:14,971 INFO L85 PathProgramCache]: Analyzing trace with hash -929169909, now seen corresponding path program 5 times [2024-06-20 15:20:14,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:14,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764945948] [2024-06-20 15:20:14,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:14,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:15,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:15,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764945948] [2024-06-20 15:20:15,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764945948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:15,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:15,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:15,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681462306] [2024-06-20 15:20:15,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:15,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:15,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:15,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:15,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:15,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:15,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 530 transitions, 8178 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) [2024-06-20 15:20:15,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:15,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:15,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:16,917 INFO L124 PetriNetUnfolderBase]: 4235/7186 cut-off events. [2024-06-20 15:20:16,917 INFO L125 PetriNetUnfolderBase]: For 1279076/1279086 co-relation queries the response was YES. [2024-06-20 15:20:16,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64814 conditions, 7186 events. 4235/7186 cut-off events. For 1279076/1279086 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 50850 event pairs, 1271 based on Foata normal form. 10/7190 useless extension candidates. Maximal degree in co-relation 64629. Up to 6395 conditions per place. [2024-06-20 15:20:17,022 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 418 selfloop transitions, 127 changer transitions 0/552 dead transitions. [2024-06-20 15:20:17,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 552 transitions, 9636 flow [2024-06-20 15:20:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:20:17,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:20:17,023 INFO L175 Difference]: Start difference. First operand has 387 places, 530 transitions, 8178 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:20:17,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 552 transitions, 9636 flow [2024-06-20 15:20:24,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 552 transitions, 9426 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 15:20:24,189 INFO L231 Difference]: Finished difference. Result has 390 places, 534 transitions, 8349 flow [2024-06-20 15:20:24,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7978, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8349, PETRI_PLACES=390, PETRI_TRANSITIONS=534} [2024-06-20 15:20:24,189 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-20 15:20:24,189 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 534 transitions, 8349 flow [2024-06-20 15:20:24,189 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) [2024-06-20 15:20:24,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:24,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:24,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:20:24,190 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:24,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:24,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1084904064, now seen corresponding path program 16 times [2024-06-20 15:20:24,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:24,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451727111] [2024-06-20 15:20:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:24,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:24,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:24,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451727111] [2024-06-20 15:20:24,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451727111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:24,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:24,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:24,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034584420] [2024-06-20 15:20:24,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:24,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:24,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:24,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:24,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:24,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:24,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 534 transitions, 8349 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:24,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:24,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:24,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:26,311 INFO L124 PetriNetUnfolderBase]: 4240/7195 cut-off events. [2024-06-20 15:20:26,311 INFO L125 PetriNetUnfolderBase]: For 1270526/1270530 co-relation queries the response was YES. [2024-06-20 15:20:26,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64911 conditions, 7195 events. 4240/7195 cut-off events. For 1270526/1270530 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 50925 event pairs, 1267 based on Foata normal form. 2/7192 useless extension candidates. Maximal degree in co-relation 64724. Up to 6162 conditions per place. [2024-06-20 15:20:26,534 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 319 selfloop transitions, 236 changer transitions 0/562 dead transitions. [2024-06-20 15:20:26,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 562 transitions, 10002 flow [2024-06-20 15:20:26,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:20:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:20:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 15:20:26,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2024-06-20 15:20:26,536 INFO L175 Difference]: Start difference. First operand has 390 places, 534 transitions, 8349 flow. Second operand 10 states and 231 transitions. [2024-06-20 15:20:26,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 562 transitions, 10002 flow [2024-06-20 15:20:35,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 562 transitions, 9786 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-20 15:20:35,383 INFO L231 Difference]: Finished difference. Result has 396 places, 537 transitions, 8678 flow [2024-06-20 15:20:35,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8133, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8678, PETRI_PLACES=396, PETRI_TRANSITIONS=537} [2024-06-20 15:20:35,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-20 15:20:35,384 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 537 transitions, 8678 flow [2024-06-20 15:20:35,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:35,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:35,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:35,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:20:35,384 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:35,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:35,385 INFO L85 PathProgramCache]: Analyzing trace with hash -913140504, now seen corresponding path program 17 times [2024-06-20 15:20:35,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:35,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695475408] [2024-06-20 15:20:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:35,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:35,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:35,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695475408] [2024-06-20 15:20:35,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695475408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:35,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:35,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:35,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499751739] [2024-06-20 15:20:35,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:35,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:35,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:35,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:35,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:35,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:35,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 537 transitions, 8678 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:35,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:35,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:35,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:37,267 INFO L124 PetriNetUnfolderBase]: 4253/7221 cut-off events. [2024-06-20 15:20:37,267 INFO L125 PetriNetUnfolderBase]: For 1299624/1299628 co-relation queries the response was YES. [2024-06-20 15:20:37,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65852 conditions, 7221 events. 4253/7221 cut-off events. For 1299624/1299628 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 51249 event pairs, 1269 based on Foata normal form. 2/7218 useless extension candidates. Maximal degree in co-relation 65663. Up to 6177 conditions per place. [2024-06-20 15:20:37,370 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 324 selfloop transitions, 237 changer transitions 0/568 dead transitions. [2024-06-20 15:20:37,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 568 transitions, 10622 flow [2024-06-20 15:20:37,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:20:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:20:37,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-20 15:20:37,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:20:37,492 INFO L175 Difference]: Start difference. First operand has 396 places, 537 transitions, 8678 flow. Second operand 12 states and 264 transitions. [2024-06-20 15:20:37,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 568 transitions, 10622 flow [2024-06-20 15:20:45,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 568 transitions, 10010 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-20 15:20:45,544 INFO L231 Difference]: Finished difference. Result has 399 places, 543 transitions, 8684 flow [2024-06-20 15:20:45,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8084, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8684, PETRI_PLACES=399, PETRI_TRANSITIONS=543} [2024-06-20 15:20:45,545 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-20 15:20:45,545 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 543 transitions, 8684 flow [2024-06-20 15:20:45,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:45,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:45,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:45,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:20:45,545 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:45,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:45,546 INFO L85 PathProgramCache]: Analyzing trace with hash -943454709, now seen corresponding path program 6 times [2024-06-20 15:20:45,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:45,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853778393] [2024-06-20 15:20:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:45,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:45,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:45,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853778393] [2024-06-20 15:20:45,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853778393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:45,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:45,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:45,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854347561] [2024-06-20 15:20:45,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:45,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:45,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:45,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:45,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:45,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:45,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 543 transitions, 8684 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) [2024-06-20 15:20:45,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:45,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:45,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:47,534 INFO L124 PetriNetUnfolderBase]: 4261/7235 cut-off events. [2024-06-20 15:20:47,534 INFO L125 PetriNetUnfolderBase]: For 1307172/1307182 co-relation queries the response was YES. [2024-06-20 15:20:47,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65835 conditions, 7235 events. 4261/7235 cut-off events. For 1307172/1307182 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 51280 event pairs, 1277 based on Foata normal form. 10/7239 useless extension candidates. Maximal degree in co-relation 65646. Up to 6457 conditions per place. [2024-06-20 15:20:47,635 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 431 selfloop transitions, 123 changer transitions 0/561 dead transitions. [2024-06-20 15:20:47,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 561 transitions, 9872 flow [2024-06-20 15:20:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-20 15:20:47,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-20 15:20:47,636 INFO L175 Difference]: Start difference. First operand has 399 places, 543 transitions, 8684 flow. Second operand 8 states and 178 transitions. [2024-06-20 15:20:47,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 561 transitions, 9872 flow [2024-06-20 15:20:56,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 561 transitions, 9464 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-20 15:20:56,815 INFO L231 Difference]: Finished difference. Result has 398 places, 545 transitions, 8573 flow [2024-06-20 15:20:56,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8276, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8573, PETRI_PLACES=398, PETRI_TRANSITIONS=545} [2024-06-20 15:20:56,815 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-20 15:20:56,816 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 545 transitions, 8573 flow [2024-06-20 15:20:56,816 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) [2024-06-20 15:20:56,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:56,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:56,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:20:56,816 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:56,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:56,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1084915224, now seen corresponding path program 18 times [2024-06-20 15:20:56,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:56,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121897401] [2024-06-20 15:20:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:56,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:56,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:56,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121897401] [2024-06-20 15:20:56,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121897401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:56,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:56,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:56,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896954530] [2024-06-20 15:20:56,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:56,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:56,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:56,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:56,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:57,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:57,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 545 transitions, 8573 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:57,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:57,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:57,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:58,743 INFO L124 PetriNetUnfolderBase]: 4258/7221 cut-off events. [2024-06-20 15:20:58,744 INFO L125 PetriNetUnfolderBase]: For 1293722/1293726 co-relation queries the response was YES. [2024-06-20 15:20:58,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65402 conditions, 7221 events. 4258/7221 cut-off events. For 1293722/1293726 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 51146 event pairs, 1265 based on Foata normal form. 2/7218 useless extension candidates. Maximal degree in co-relation 65213. Up to 6186 conditions per place. [2024-06-20 15:20:58,957 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 322 selfloop transitions, 245 changer transitions 0/574 dead transitions. [2024-06-20 15:20:58,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 574 transitions, 9989 flow [2024-06-20 15:20:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:20:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:20:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-20 15:20:58,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604166666666667 [2024-06-20 15:20:58,958 INFO L175 Difference]: Start difference. First operand has 398 places, 545 transitions, 8573 flow. Second operand 12 states and 269 transitions. [2024-06-20 15:20:58,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 574 transitions, 9989 flow [2024-06-20 15:21:06,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 574 transitions, 9694 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 15:21:06,937 INFO L231 Difference]: Finished difference. Result has 404 places, 545 transitions, 8778 flow [2024-06-20 15:21:06,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8278, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8778, PETRI_PLACES=404, PETRI_TRANSITIONS=545} [2024-06-20 15:21:06,938 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 363 predicate places. [2024-06-20 15:21:06,938 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 545 transitions, 8778 flow [2024-06-20 15:21:06,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:06,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:06,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:06,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:21:06,938 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:06,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:06,939 INFO L85 PathProgramCache]: Analyzing trace with hash -913134924, now seen corresponding path program 19 times [2024-06-20 15:21:06,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:06,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719491699] [2024-06-20 15:21:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:06,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:07,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:07,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719491699] [2024-06-20 15:21:07,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719491699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:07,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:07,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:07,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005365931] [2024-06-20 15:21:07,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:07,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:07,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:07,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:07,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:07,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:07,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 545 transitions, 8778 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:07,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:07,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:07,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:08,779 INFO L124 PetriNetUnfolderBase]: 4255/7225 cut-off events. [2024-06-20 15:21:08,779 INFO L125 PetriNetUnfolderBase]: For 1311594/1311598 co-relation queries the response was YES. [2024-06-20 15:21:08,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65750 conditions, 7225 events. 4255/7225 cut-off events. For 1311594/1311598 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 51223 event pairs, 1269 based on Foata normal form. 2/7222 useless extension candidates. Maximal degree in co-relation 65560. Up to 6183 conditions per place. [2024-06-20 15:21:09,012 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 324 selfloop transitions, 235 changer transitions 0/566 dead transitions. [2024-06-20 15:21:09,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 566 transitions, 10160 flow [2024-06-20 15:21:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:21:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:21:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-20 15:21:09,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-20 15:21:09,014 INFO L175 Difference]: Start difference. First operand has 404 places, 545 transitions, 8778 flow. Second operand 10 states and 227 transitions. [2024-06-20 15:21:09,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 566 transitions, 10160 flow [2024-06-20 15:21:18,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 566 transitions, 9632 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-20 15:21:18,122 INFO L231 Difference]: Finished difference. Result has 402 places, 545 transitions, 8732 flow [2024-06-20 15:21:18,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8252, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8732, PETRI_PLACES=402, PETRI_TRANSITIONS=545} [2024-06-20 15:21:18,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-20 15:21:18,123 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 545 transitions, 8732 flow [2024-06-20 15:21:18,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:18,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:18,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:18,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:21:18,123 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:18,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash -484678491, now seen corresponding path program 7 times [2024-06-20 15:21:18,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:18,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473853490] [2024-06-20 15:21:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:18,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:18,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:18,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473853490] [2024-06-20 15:21:18,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473853490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:18,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:18,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:18,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188983988] [2024-06-20 15:21:18,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:18,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:18,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:18,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:18,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:18,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:18,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 545 transitions, 8732 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) [2024-06-20 15:21:18,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:18,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:18,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:19,986 INFO L124 PetriNetUnfolderBase]: 4263/7241 cut-off events. [2024-06-20 15:21:19,986 INFO L125 PetriNetUnfolderBase]: For 1319814/1319824 co-relation queries the response was YES. [2024-06-20 15:21:20,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65836 conditions, 7241 events. 4263/7241 cut-off events. For 1319814/1319824 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 51449 event pairs, 1277 based on Foata normal form. 10/7245 useless extension candidates. Maximal degree in co-relation 65646. Up to 6362 conditions per place. [2024-06-20 15:21:20,213 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 430 selfloop transitions, 133 changer transitions 0/570 dead transitions. [2024-06-20 15:21:20,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 570 transitions, 10242 flow [2024-06-20 15:21:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 15:21:20,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:21:20,214 INFO L175 Difference]: Start difference. First operand has 402 places, 545 transitions, 8732 flow. Second operand 8 states and 184 transitions. [2024-06-20 15:21:20,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 570 transitions, 10242 flow [2024-06-20 15:21:27,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 570 transitions, 9764 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:21:27,823 INFO L231 Difference]: Finished difference. Result has 401 places, 549 transitions, 8646 flow [2024-06-20 15:21:27,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8256, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8646, PETRI_PLACES=401, PETRI_TRANSITIONS=549} [2024-06-20 15:21:27,824 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-20 15:21:27,824 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 549 transitions, 8646 flow [2024-06-20 15:21:27,824 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) [2024-06-20 15:21:27,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:27,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:27,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:21:27,824 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:27,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:27,825 INFO L85 PathProgramCache]: Analyzing trace with hash -493249371, now seen corresponding path program 8 times [2024-06-20 15:21:27,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:27,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360673400] [2024-06-20 15:21:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:27,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:27,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:27,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360673400] [2024-06-20 15:21:27,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360673400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:27,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:27,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:27,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728793558] [2024-06-20 15:21:27,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:27,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:27,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:27,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:27,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:27,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:27,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 549 transitions, 8646 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) [2024-06-20 15:21:27,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:27,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:27,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:29,658 INFO L124 PetriNetUnfolderBase]: 4258/7228 cut-off events. [2024-06-20 15:21:29,658 INFO L125 PetriNetUnfolderBase]: For 1309355/1309365 co-relation queries the response was YES. [2024-06-20 15:21:29,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65502 conditions, 7228 events. 4258/7228 cut-off events. For 1309355/1309365 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 51369 event pairs, 1276 based on Foata normal form. 10/7232 useless extension candidates. Maximal degree in co-relation 65311. Up to 6454 conditions per place. [2024-06-20 15:21:29,763 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 434 selfloop transitions, 124 changer transitions 0/565 dead transitions. [2024-06-20 15:21:29,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 565 transitions, 9800 flow [2024-06-20 15:21:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-20 15:21:29,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-20 15:21:29,764 INFO L175 Difference]: Start difference. First operand has 401 places, 549 transitions, 8646 flow. Second operand 8 states and 179 transitions. [2024-06-20 15:21:29,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 565 transitions, 9800 flow [2024-06-20 15:21:38,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 565 transitions, 9544 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-20 15:21:38,424 INFO L231 Difference]: Finished difference. Result has 405 places, 549 transitions, 8643 flow [2024-06-20 15:21:38,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8390, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8643, PETRI_PLACES=405, PETRI_TRANSITIONS=549} [2024-06-20 15:21:38,425 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-20 15:21:38,425 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 549 transitions, 8643 flow [2024-06-20 15:21:38,425 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) [2024-06-20 15:21:38,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:38,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:38,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:21:38,426 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:38,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1288053011, now seen corresponding path program 9 times [2024-06-20 15:21:38,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:38,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164364724] [2024-06-20 15:21:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:38,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:38,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:38,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164364724] [2024-06-20 15:21:38,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164364724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:38,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:38,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:38,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001813493] [2024-06-20 15:21:38,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:38,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:38,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:38,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:38,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:38,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:38,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 549 transitions, 8643 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) [2024-06-20 15:21:38,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:38,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:38,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:40,449 INFO L124 PetriNetUnfolderBase]: 4266/7240 cut-off events. [2024-06-20 15:21:40,449 INFO L125 PetriNetUnfolderBase]: For 1332137/1332147 co-relation queries the response was YES. [2024-06-20 15:21:40,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65924 conditions, 7240 events. 4266/7240 cut-off events. For 1332137/1332147 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 51390 event pairs, 1210 based on Foata normal form. 10/7244 useless extension candidates. Maximal degree in co-relation 65731. Up to 5895 conditions per place. [2024-06-20 15:21:40,555 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 415 selfloop transitions, 156 changer transitions 0/578 dead transitions. [2024-06-20 15:21:40,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 578 transitions, 10459 flow [2024-06-20 15:21:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:21:40,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-20 15:21:40,556 INFO L175 Difference]: Start difference. First operand has 405 places, 549 transitions, 8643 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:21:40,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 578 transitions, 10459 flow [2024-06-20 15:21:48,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 578 transitions, 10199 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:48,818 INFO L231 Difference]: Finished difference. Result has 407 places, 555 transitions, 8927 flow [2024-06-20 15:21:48,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8383, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8927, PETRI_PLACES=407, PETRI_TRANSITIONS=555} [2024-06-20 15:21:48,818 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-20 15:21:48,819 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 555 transitions, 8927 flow [2024-06-20 15:21:48,819 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) [2024-06-20 15:21:48,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:48,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:48,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:21:48,819 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:48,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:48,819 INFO L85 PathProgramCache]: Analyzing trace with hash -83393721, now seen corresponding path program 10 times [2024-06-20 15:21:48,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:48,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381639857] [2024-06-20 15:21:48,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:48,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:48,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:48,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381639857] [2024-06-20 15:21:48,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381639857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:48,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:48,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:48,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616244218] [2024-06-20 15:21:48,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:48,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:48,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:48,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:48,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 555 transitions, 8927 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) [2024-06-20 15:21:48,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:48,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:48,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:50,728 INFO L124 PetriNetUnfolderBase]: 4261/7233 cut-off events. [2024-06-20 15:21:50,728 INFO L125 PetriNetUnfolderBase]: For 1346562/1346572 co-relation queries the response was YES. [2024-06-20 15:21:50,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66503 conditions, 7233 events. 4261/7233 cut-off events. For 1346562/1346572 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 51316 event pairs, 1176 based on Foata normal form. 10/7237 useless extension candidates. Maximal degree in co-relation 66308. Up to 5891 conditions per place. [2024-06-20 15:21:50,837 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 415 selfloop transitions, 158 changer transitions 0/580 dead transitions. [2024-06-20 15:21:50,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 580 transitions, 10399 flow [2024-06-20 15:21:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 15:21:50,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-20 15:21:50,838 INFO L175 Difference]: Start difference. First operand has 407 places, 555 transitions, 8927 flow. Second operand 8 states and 187 transitions. [2024-06-20 15:21:50,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 580 transitions, 10399 flow [2024-06-20 15:21:59,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 580 transitions, 10137 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-20 15:21:59,980 INFO L231 Difference]: Finished difference. Result has 412 places, 555 transitions, 8986 flow [2024-06-20 15:21:59,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8665, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8986, PETRI_PLACES=412, PETRI_TRANSITIONS=555} [2024-06-20 15:21:59,989 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-06-20 15:21:59,989 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 555 transitions, 8986 flow [2024-06-20 15:21:59,989 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) [2024-06-20 15:21:59,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:59,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:59,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:21:59,990 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:59,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:59,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1794318484, now seen corresponding path program 20 times [2024-06-20 15:21:59,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:59,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557013876] [2024-06-20 15:21:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:59,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:00,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:00,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557013876] [2024-06-20 15:22:00,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557013876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:00,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:00,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:00,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936495298] [2024-06-20 15:22:00,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:00,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:00,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:00,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:00,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:00,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:00,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 555 transitions, 8986 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:00,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:00,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:00,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:02,030 INFO L124 PetriNetUnfolderBase]: 4274/7256 cut-off events. [2024-06-20 15:22:02,031 INFO L125 PetriNetUnfolderBase]: For 1370228/1370235 co-relation queries the response was YES. [2024-06-20 15:22:02,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67310 conditions, 7256 events. 4274/7256 cut-off events. For 1370228/1370235 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 51530 event pairs, 1300 based on Foata normal form. 4/7252 useless extension candidates. Maximal degree in co-relation 67113. Up to 6208 conditions per place. [2024-06-20 15:22:02,145 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 333 selfloop transitions, 239 changer transitions 0/579 dead transitions. [2024-06-20 15:22:02,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 579 transitions, 10734 flow [2024-06-20 15:22:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-20 15:22:02,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 15:22:02,146 INFO L175 Difference]: Start difference. First operand has 412 places, 555 transitions, 8986 flow. Second operand 9 states and 204 transitions. [2024-06-20 15:22:02,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 579 transitions, 10734 flow [2024-06-20 15:22:09,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 579 transitions, 10304 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:09,892 INFO L231 Difference]: Finished difference. Result has 414 places, 561 transitions, 9162 flow [2024-06-20 15:22:09,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8556, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9162, PETRI_PLACES=414, PETRI_TRANSITIONS=561} [2024-06-20 15:22:09,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2024-06-20 15:22:09,892 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 561 transitions, 9162 flow [2024-06-20 15:22:09,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:09,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:09,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:09,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:22:09,893 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:09,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:09,893 INFO L85 PathProgramCache]: Analyzing trace with hash -943467450, now seen corresponding path program 21 times [2024-06-20 15:22:09,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:09,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554557747] [2024-06-20 15:22:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:09,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:10,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:10,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554557747] [2024-06-20 15:22:10,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554557747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:10,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:10,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:10,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803039691] [2024-06-20 15:22:10,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:10,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:10,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:10,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:10,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 561 transitions, 9162 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:10,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:10,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:10,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:11,873 INFO L124 PetriNetUnfolderBase]: 4271/7252 cut-off events. [2024-06-20 15:22:11,873 INFO L125 PetriNetUnfolderBase]: For 1386906/1386913 co-relation queries the response was YES. [2024-06-20 15:22:11,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67000 conditions, 7252 events. 4271/7252 cut-off events. For 1386906/1386913 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 51532 event pairs, 1300 based on Foata normal form. 4/7248 useless extension candidates. Maximal degree in co-relation 66803. Up to 6205 conditions per place. [2024-06-20 15:22:11,979 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 333 selfloop transitions, 240 changer transitions 0/580 dead transitions. [2024-06-20 15:22:11,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 580 transitions, 10574 flow [2024-06-20 15:22:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:22:11,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:22:11,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-20 15:22:11,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2024-06-20 15:22:11,981 INFO L175 Difference]: Start difference. First operand has 414 places, 561 transitions, 9162 flow. Second operand 11 states and 237 transitions. [2024-06-20 15:22:11,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 580 transitions, 10574 flow [2024-06-20 15:22:21,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 580 transitions, 10138 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:21,634 INFO L231 Difference]: Finished difference. Result has 420 places, 561 transitions, 9212 flow [2024-06-20 15:22:21,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8726, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9212, PETRI_PLACES=420, PETRI_TRANSITIONS=561} [2024-06-20 15:22:21,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-20 15:22:21,635 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 561 transitions, 9212 flow [2024-06-20 15:22:21,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:21,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:21,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:21,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:22:21,635 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:21,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:21,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1142913390, now seen corresponding path program 22 times [2024-06-20 15:22:21,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:21,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613872438] [2024-06-20 15:22:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:21,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:21,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:21,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613872438] [2024-06-20 15:22:21,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613872438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:21,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:21,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:21,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899363497] [2024-06-20 15:22:21,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:21,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:21,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:21,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:21,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:21,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:21,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 561 transitions, 9212 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:21,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:21,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:21,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:23,612 INFO L124 PetriNetUnfolderBase]: 4276/7258 cut-off events. [2024-06-20 15:22:23,612 INFO L125 PetriNetUnfolderBase]: For 1410040/1410044 co-relation queries the response was YES. [2024-06-20 15:22:23,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67284 conditions, 7258 events. 4276/7258 cut-off events. For 1410040/1410044 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 51527 event pairs, 1269 based on Foata normal form. 2/7255 useless extension candidates. Maximal degree in co-relation 67086. Up to 6650 conditions per place. [2024-06-20 15:22:23,724 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 535 selfloop transitions, 34 changer transitions 0/576 dead transitions. [2024-06-20 15:22:23,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 576 transitions, 10448 flow [2024-06-20 15:22:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-20 15:22:23,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-20 15:22:23,725 INFO L175 Difference]: Start difference. First operand has 420 places, 561 transitions, 9212 flow. Second operand 8 states and 170 transitions. [2024-06-20 15:22:23,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 576 transitions, 10448 flow [2024-06-20 15:22:33,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 576 transitions, 10075 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:22:33,420 INFO L231 Difference]: Finished difference. Result has 419 places, 564 transitions, 8989 flow [2024-06-20 15:22:33,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8842, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8989, PETRI_PLACES=419, PETRI_TRANSITIONS=564} [2024-06-20 15:22:33,421 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-20 15:22:33,421 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 564 transitions, 8989 flow [2024-06-20 15:22:33,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:33,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:33,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:33,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:22:33,422 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:33,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:33,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2139571694, now seen corresponding path program 23 times [2024-06-20 15:22:33,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:33,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364773821] [2024-06-20 15:22:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:33,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:33,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:33,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364773821] [2024-06-20 15:22:33,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364773821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:33,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:33,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:33,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123642839] [2024-06-20 15:22:33,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:33,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:33,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:33,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:33,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 564 transitions, 8989 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:33,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:33,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:33,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:35,468 INFO L124 PetriNetUnfolderBase]: 4281/7270 cut-off events. [2024-06-20 15:22:35,468 INFO L125 PetriNetUnfolderBase]: For 1435248/1435255 co-relation queries the response was YES. [2024-06-20 15:22:35,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67108 conditions, 7270 events. 4281/7270 cut-off events. For 1435248/1435255 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51657 event pairs, 1300 based on Foata normal form. 4/7266 useless extension candidates. Maximal degree in co-relation 66909. Up to 6217 conditions per place. [2024-06-20 15:22:35,577 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 334 selfloop transitions, 244 changer transitions 0/585 dead transitions. [2024-06-20 15:22:35,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 585 transitions, 10486 flow [2024-06-20 15:22:35,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:22:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:22:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-20 15:22:35,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-20 15:22:35,579 INFO L175 Difference]: Start difference. First operand has 419 places, 564 transitions, 8989 flow. Second operand 10 states and 223 transitions. [2024-06-20 15:22:35,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 585 transitions, 10486 flow [2024-06-20 15:22:43,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 585 transitions, 10376 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:43,436 INFO L231 Difference]: Finished difference. Result has 423 places, 567 transitions, 9446 flow [2024-06-20 15:22:43,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8879, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9446, PETRI_PLACES=423, PETRI_TRANSITIONS=567} [2024-06-20 15:22:43,453 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 382 predicate places. [2024-06-20 15:22:43,453 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 567 transitions, 9446 flow [2024-06-20 15:22:43,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:43,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:43,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:43,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:22:43,453 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:43,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:43,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2139577274, now seen corresponding path program 24 times [2024-06-20 15:22:43,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:43,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480253498] [2024-06-20 15:22:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:43,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:43,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:43,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480253498] [2024-06-20 15:22:43,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480253498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:43,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:43,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:43,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683083372] [2024-06-20 15:22:43,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:43,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:43,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:43,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:43,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:43,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:43,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 567 transitions, 9446 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:43,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:43,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:43,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:45,452 INFO L124 PetriNetUnfolderBase]: 4278/7270 cut-off events. [2024-06-20 15:22:45,452 INFO L125 PetriNetUnfolderBase]: For 1455383/1455390 co-relation queries the response was YES. [2024-06-20 15:22:45,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67693 conditions, 7270 events. 4278/7270 cut-off events. For 1455383/1455390 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51709 event pairs, 1302 based on Foata normal form. 4/7266 useless extension candidates. Maximal degree in co-relation 67493. Up to 6214 conditions per place. [2024-06-20 15:22:45,562 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 334 selfloop transitions, 245 changer transitions 0/586 dead transitions. [2024-06-20 15:22:45,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 586 transitions, 10648 flow [2024-06-20 15:22:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:22:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:22:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-20 15:22:45,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-20 15:22:45,564 INFO L175 Difference]: Start difference. First operand has 423 places, 567 transitions, 9446 flow. Second operand 12 states and 258 transitions. [2024-06-20 15:22:45,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 586 transitions, 10648 flow [2024-06-20 15:22:53,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 586 transitions, 9395 flow, removed 47 selfloop flow, removed 13 redundant places. [2024-06-20 15:22:53,943 INFO L231 Difference]: Finished difference. Result has 422 places, 567 transitions, 8689 flow [2024-06-20 15:22:53,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8193, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8689, PETRI_PLACES=422, PETRI_TRANSITIONS=567} [2024-06-20 15:22:53,956 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-20 15:22:53,956 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 567 transitions, 8689 flow [2024-06-20 15:22:53,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:53,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:53,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:53,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:22:53,957 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:53,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:53,957 INFO L85 PathProgramCache]: Analyzing trace with hash -727524499, now seen corresponding path program 1 times [2024-06-20 15:22:53,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:53,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001823590] [2024-06-20 15:22:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:53,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:54,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:54,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001823590] [2024-06-20 15:22:54,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001823590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:54,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:54,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:54,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140470644] [2024-06-20 15:22:54,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:54,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:54,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:54,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:54,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:54,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:54,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 567 transitions, 8689 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:54,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:54,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:54,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:56,396 INFO L124 PetriNetUnfolderBase]: 4891/8312 cut-off events. [2024-06-20 15:22:56,396 INFO L125 PetriNetUnfolderBase]: For 2140297/2140301 co-relation queries the response was YES. [2024-06-20 15:22:56,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84551 conditions, 8312 events. 4891/8312 cut-off events. For 2140297/2140301 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 60433 event pairs, 1119 based on Foata normal form. 7/8314 useless extension candidates. Maximal degree in co-relation 84352. Up to 4208 conditions per place. [2024-06-20 15:22:56,529 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 485 selfloop transitions, 142 changer transitions 0/634 dead transitions. [2024-06-20 15:22:56,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 634 transitions, 11296 flow [2024-06-20 15:22:56,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-20 15:22:56,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-20 15:22:56,530 INFO L175 Difference]: Start difference. First operand has 422 places, 567 transitions, 8689 flow. Second operand 9 states and 232 transitions. [2024-06-20 15:22:56,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 634 transitions, 11296 flow [2024-06-20 15:23:11,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 634 transitions, 10784 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:23:11,497 INFO L231 Difference]: Finished difference. Result has 423 places, 577 transitions, 8854 flow [2024-06-20 15:23:11,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8181, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8854, PETRI_PLACES=423, PETRI_TRANSITIONS=577} [2024-06-20 15:23:11,497 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 382 predicate places. [2024-06-20 15:23:11,497 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 577 transitions, 8854 flow [2024-06-20 15:23:11,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:11,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:11,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:11,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:23:11,498 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:11,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:11,498 INFO L85 PathProgramCache]: Analyzing trace with hash -727404343, now seen corresponding path program 1 times [2024-06-20 15:23:11,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:11,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637246535] [2024-06-20 15:23:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:11,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:11,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:11,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637246535] [2024-06-20 15:23:11,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637246535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:11,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:11,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:23:11,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237863482] [2024-06-20 15:23:11,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:11,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:23:11,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:23:11,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:23:11,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:11,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 577 transitions, 8854 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:11,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:11,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:11,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:14,095 INFO L124 PetriNetUnfolderBase]: 5096/8693 cut-off events. [2024-06-20 15:23:14,096 INFO L125 PetriNetUnfolderBase]: For 2452871/2452875 co-relation queries the response was YES. [2024-06-20 15:23:14,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90570 conditions, 8693 events. 5096/8693 cut-off events. For 2452871/2452875 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 63901 event pairs, 1352 based on Foata normal form. 25/8713 useless extension candidates. Maximal degree in co-relation 90367. Up to 7469 conditions per place. [2024-06-20 15:23:14,228 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 559 selfloop transitions, 51 changer transitions 0/617 dead transitions. [2024-06-20 15:23:14,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 617 transitions, 10548 flow [2024-06-20 15:23:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:23:14,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:23:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:23:14,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-20 15:23:14,230 INFO L175 Difference]: Start difference. First operand has 423 places, 577 transitions, 8854 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:23:14,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 617 transitions, 10548 flow [2024-06-20 15:23:28,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 617 transitions, 10313 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 15:23:28,143 INFO L231 Difference]: Finished difference. Result has 429 places, 581 transitions, 8841 flow [2024-06-20 15:23:28,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8633, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8841, PETRI_PLACES=429, PETRI_TRANSITIONS=581} [2024-06-20 15:23:28,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-20 15:23:28,144 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 581 transitions, 8841 flow [2024-06-20 15:23:28,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:28,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:28,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:28,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:23:28,144 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:28,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash -727404529, now seen corresponding path program 2 times [2024-06-20 15:23:28,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:28,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287964181] [2024-06-20 15:23:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:28,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:28,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:28,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287964181] [2024-06-20 15:23:28,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287964181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:28,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:28,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:23:28,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225593183] [2024-06-20 15:23:28,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:28,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:23:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:28,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:23:28,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:23:28,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:28,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 581 transitions, 8841 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:28,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:28,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:28,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:30,737 INFO L124 PetriNetUnfolderBase]: 5035/8584 cut-off events. [2024-06-20 15:23:30,737 INFO L125 PetriNetUnfolderBase]: For 2343653/2343657 co-relation queries the response was YES. [2024-06-20 15:23:30,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86865 conditions, 8584 events. 5035/8584 cut-off events. For 2343653/2343657 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 63058 event pairs, 1336 based on Foata normal form. 25/8604 useless extension candidates. Maximal degree in co-relation 86660. Up to 7469 conditions per place. [2024-06-20 15:23:30,867 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 544 selfloop transitions, 46 changer transitions 19/616 dead transitions. [2024-06-20 15:23:30,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 616 transitions, 10191 flow [2024-06-20 15:23:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:23:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:23:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-20 15:23:30,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:23:30,869 INFO L175 Difference]: Start difference. First operand has 429 places, 581 transitions, 8841 flow. Second operand 9 states and 207 transitions. [2024-06-20 15:23:30,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 616 transitions, 10191 flow [2024-06-20 15:23:45,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 616 transitions, 10019 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:45,743 INFO L231 Difference]: Finished difference. Result has 433 places, 576 transitions, 8712 flow [2024-06-20 15:23:45,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8669, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8712, PETRI_PLACES=433, PETRI_TRANSITIONS=576} [2024-06-20 15:23:45,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-20 15:23:45,744 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 576 transitions, 8712 flow [2024-06-20 15:23:45,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:45,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:45,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:45,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:23:45,745 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:45,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:45,745 INFO L85 PathProgramCache]: Analyzing trace with hash -550272823, now seen corresponding path program 2 times [2024-06-20 15:23:45,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:45,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163422728] [2024-06-20 15:23:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:45,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:45,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:45,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163422728] [2024-06-20 15:23:45,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163422728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:45,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:45,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:23:45,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651294186] [2024-06-20 15:23:45,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:45,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:23:45,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:45,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:23:45,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:23:45,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:45,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 576 transitions, 8712 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:45,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:45,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:45,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:48,405 INFO L124 PetriNetUnfolderBase]: 5125/8728 cut-off events. [2024-06-20 15:23:48,405 INFO L125 PetriNetUnfolderBase]: For 2591164/2591168 co-relation queries the response was YES. [2024-06-20 15:23:48,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91576 conditions, 8728 events. 5125/8728 cut-off events. For 2591164/2591168 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 64088 event pairs, 1386 based on Foata normal form. 25/8748 useless extension candidates. Maximal degree in co-relation 91370. Up to 7188 conditions per place. [2024-06-20 15:23:48,544 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 562 selfloop transitions, 53 changer transitions 0/622 dead transitions. [2024-06-20 15:23:48,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 622 transitions, 10721 flow [2024-06-20 15:23:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:23:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:23:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-20 15:23:48,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:23:48,545 INFO L175 Difference]: Start difference. First operand has 433 places, 576 transitions, 8712 flow. Second operand 10 states and 230 transitions. [2024-06-20 15:23:48,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 622 transitions, 10721 flow [2024-06-20 15:24:04,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 622 transitions, 10605 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 15:24:04,936 INFO L231 Difference]: Finished difference. Result has 429 places, 580 transitions, 8774 flow [2024-06-20 15:24:04,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8612, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8774, PETRI_PLACES=429, PETRI_TRANSITIONS=580} [2024-06-20 15:24:04,937 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-20 15:24:04,937 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 580 transitions, 8774 flow [2024-06-20 15:24:04,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:04,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:04,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:04,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:24:04,938 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:04,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:04,938 INFO L85 PathProgramCache]: Analyzing trace with hash -68038273, now seen corresponding path program 3 times [2024-06-20 15:24:04,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:04,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210045062] [2024-06-20 15:24:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:04,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:05,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:05,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210045062] [2024-06-20 15:24:05,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210045062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:05,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:05,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:24:05,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081492543] [2024-06-20 15:24:05,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:05,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:24:05,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:05,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:24:05,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:24:05,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:05,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 580 transitions, 8774 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:05,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:05,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:05,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:07,554 INFO L124 PetriNetUnfolderBase]: 5079/8664 cut-off events. [2024-06-20 15:24:07,554 INFO L125 PetriNetUnfolderBase]: For 2389792/2389796 co-relation queries the response was YES. [2024-06-20 15:24:07,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88074 conditions, 8664 events. 5079/8664 cut-off events. For 2389792/2389796 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 63657 event pairs, 1342 based on Foata normal form. 25/8684 useless extension candidates. Maximal degree in co-relation 87870. Up to 7188 conditions per place. [2024-06-20 15:24:07,687 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 556 selfloop transitions, 49 changer transitions 10/622 dead transitions. [2024-06-20 15:24:07,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 622 transitions, 10722 flow [2024-06-20 15:24:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:24:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:24:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-20 15:24:07,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-20 15:24:07,688 INFO L175 Difference]: Start difference. First operand has 429 places, 580 transitions, 8774 flow. Second operand 10 states and 229 transitions. [2024-06-20 15:24:07,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 622 transitions, 10722 flow [2024-06-20 15:24:24,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 622 transitions, 10571 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 15:24:24,014 INFO L231 Difference]: Finished difference. Result has 435 places, 575 transitions, 8661 flow [2024-06-20 15:24:24,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8623, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8661, PETRI_PLACES=435, PETRI_TRANSITIONS=575} [2024-06-20 15:24:24,014 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-20 15:24:24,015 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 575 transitions, 8661 flow [2024-06-20 15:24:24,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:24,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:24,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:24,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:24:24,015 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:24,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:24,015 INFO L85 PathProgramCache]: Analyzing trace with hash -550035673, now seen corresponding path program 3 times [2024-06-20 15:24:24,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:24,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996249569] [2024-06-20 15:24:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:24,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:24,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:24,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996249569] [2024-06-20 15:24:24,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996249569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:24,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:24,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:24:24,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857418046] [2024-06-20 15:24:24,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:24,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:24:24,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:24,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:24:24,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:24:24,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:24,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 575 transitions, 8661 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:24,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:24,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:24,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:26,772 INFO L124 PetriNetUnfolderBase]: 5032/8583 cut-off events. [2024-06-20 15:24:26,772 INFO L125 PetriNetUnfolderBase]: For 2378195/2378199 co-relation queries the response was YES. [2024-06-20 15:24:27,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88986 conditions, 8583 events. 5032/8583 cut-off events. For 2378195/2378199 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 62957 event pairs, 1300 based on Foata normal form. 7/8585 useless extension candidates. Maximal degree in co-relation 88781. Up to 7188 conditions per place. [2024-06-20 15:24:27,057 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 551 selfloop transitions, 47 changer transitions 8/613 dead transitions. [2024-06-20 15:24:27,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 613 transitions, 10571 flow [2024-06-20 15:24:27,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:24:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:24:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-20 15:24:27,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:24:27,059 INFO L175 Difference]: Start difference. First operand has 435 places, 575 transitions, 8661 flow. Second operand 9 states and 207 transitions. [2024-06-20 15:24:27,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 613 transitions, 10571 flow [2024-06-20 15:24:42,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 613 transitions, 10415 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-20 15:24:42,996 INFO L231 Difference]: Finished difference. Result has 433 places, 573 transitions, 8664 flow [2024-06-20 15:24:42,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8509, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8664, PETRI_PLACES=433, PETRI_TRANSITIONS=573} [2024-06-20 15:24:42,997 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-20 15:24:42,997 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 573 transitions, 8664 flow [2024-06-20 15:24:42,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:42,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:42,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:42,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:24:42,998 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:42,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:42,998 INFO L85 PathProgramCache]: Analyzing trace with hash 763070971, now seen corresponding path program 4 times [2024-06-20 15:24:42,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:42,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161415089] [2024-06-20 15:24:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:42,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:43,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:43,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161415089] [2024-06-20 15:24:43,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161415089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:43,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:43,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:24:43,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68593348] [2024-06-20 15:24:43,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:43,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:24:43,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:43,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:24:43,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:24:43,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:43,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 573 transitions, 8664 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:43,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:43,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:43,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:45,641 INFO L124 PetriNetUnfolderBase]: 5103/8680 cut-off events. [2024-06-20 15:24:45,641 INFO L125 PetriNetUnfolderBase]: For 2596167/2596171 co-relation queries the response was YES. [2024-06-20 15:24:45,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93541 conditions, 8680 events. 5103/8680 cut-off events. For 2596167/2596171 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 63765 event pairs, 1357 based on Foata normal form. 7/8682 useless extension candidates. Maximal degree in co-relation 93335. Up to 5094 conditions per place. [2024-06-20 15:24:45,772 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 479 selfloop transitions, 135 changer transitions 0/621 dead transitions. [2024-06-20 15:24:45,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 621 transitions, 10837 flow [2024-06-20 15:24:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:45,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:24:45,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-20 15:24:45,773 INFO L175 Difference]: Start difference. First operand has 433 places, 573 transitions, 8664 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:24:45,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 621 transitions, 10837 flow [2024-06-20 15:25:01,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 621 transitions, 10690 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-20 15:25:01,838 INFO L231 Difference]: Finished difference. Result has 428 places, 577 transitions, 9082 flow [2024-06-20 15:25:01,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8539, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9082, PETRI_PLACES=428, PETRI_TRANSITIONS=577} [2024-06-20 15:25:01,838 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-20 15:25:01,838 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 577 transitions, 9082 flow [2024-06-20 15:25:01,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:01,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:01,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:01,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:25:01,839 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:01,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:01,839 INFO L85 PathProgramCache]: Analyzing trace with hash 685736851, now seen corresponding path program 5 times [2024-06-20 15:25:01,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:01,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343991366] [2024-06-20 15:25:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:01,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:01,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:01,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343991366] [2024-06-20 15:25:01,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343991366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:01,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:01,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:25:01,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109837489] [2024-06-20 15:25:01,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:01,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:25:01,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:25:01,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:25:02,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:02,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 577 transitions, 9082 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:02,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:02,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:02,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:04,396 INFO L124 PetriNetUnfolderBase]: 5131/8720 cut-off events. [2024-06-20 15:25:04,396 INFO L125 PetriNetUnfolderBase]: For 2531942/2531946 co-relation queries the response was YES. [2024-06-20 15:25:04,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94336 conditions, 8720 events. 5131/8720 cut-off events. For 2531942/2531946 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 64086 event pairs, 1597 based on Foata normal form. 9/8716 useless extension candidates. Maximal degree in co-relation 94131. Up to 7238 conditions per place. [2024-06-20 15:25:04,656 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 469 selfloop transitions, 140 changer transitions 0/616 dead transitions. [2024-06-20 15:25:04,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 616 transitions, 10861 flow [2024-06-20 15:25:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:25:04,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:25:04,657 INFO L175 Difference]: Start difference. First operand has 428 places, 577 transitions, 9082 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:25:04,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 616 transitions, 10861 flow [2024-06-20 15:25:18,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 616 transitions, 10543 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:18,810 INFO L231 Difference]: Finished difference. Result has 432 places, 582 transitions, 9254 flow [2024-06-20 15:25:18,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8764, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9254, PETRI_PLACES=432, PETRI_TRANSITIONS=582} [2024-06-20 15:25:18,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-20 15:25:18,810 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 582 transitions, 9254 flow [2024-06-20 15:25:18,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:18,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:18,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:18,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:25:18,811 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:18,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:18,811 INFO L85 PathProgramCache]: Analyzing trace with hash 694307731, now seen corresponding path program 6 times [2024-06-20 15:25:18,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:18,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379499373] [2024-06-20 15:25:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:18,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:18,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:18,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379499373] [2024-06-20 15:25:18,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379499373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:18,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:18,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:25:18,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294947234] [2024-06-20 15:25:18,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:18,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:25:18,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:18,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:25:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:25:19,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:19,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 582 transitions, 9254 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:19,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:19,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:19,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:21,414 INFO L124 PetriNetUnfolderBase]: 5113/8698 cut-off events. [2024-06-20 15:25:21,415 INFO L125 PetriNetUnfolderBase]: For 2517483/2517487 co-relation queries the response was YES. [2024-06-20 15:25:21,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93177 conditions, 8698 events. 5113/8698 cut-off events. For 2517483/2517487 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 63911 event pairs, 1810 based on Foata normal form. 9/8700 useless extension candidates. Maximal degree in co-relation 92970. Up to 7799 conditions per place. [2024-06-20 15:25:21,554 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 476 selfloop transitions, 123 changer transitions 0/606 dead transitions. [2024-06-20 15:25:21,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 606 transitions, 10566 flow [2024-06-20 15:25:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:21,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:25:21,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 15:25:21,555 INFO L175 Difference]: Start difference. First operand has 432 places, 582 transitions, 9254 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:25:21,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 606 transitions, 10566 flow [2024-06-20 15:25:35,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 606 transitions, 10369 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:35,775 INFO L231 Difference]: Finished difference. Result has 436 places, 582 transitions, 9314 flow [2024-06-20 15:25:35,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9057, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9314, PETRI_PLACES=436, PETRI_TRANSITIONS=582} [2024-06-20 15:25:35,775 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-20 15:25:35,775 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 582 transitions, 9314 flow [2024-06-20 15:25:35,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:35,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:35,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:35,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:25:35,776 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:35,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash 763190941, now seen corresponding path program 7 times [2024-06-20 15:25:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:35,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784798670] [2024-06-20 15:25:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:35,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:35,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:35,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784798670] [2024-06-20 15:25:35,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784798670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:35,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:35,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:25:35,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220609814] [2024-06-20 15:25:35,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:35,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:25:35,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:35,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:25:35,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:25:35,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:35,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 582 transitions, 9314 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:35,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:35,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:35,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:38,443 INFO L124 PetriNetUnfolderBase]: 5082/8662 cut-off events. [2024-06-20 15:25:38,443 INFO L125 PetriNetUnfolderBase]: For 2501299/2501303 co-relation queries the response was YES. [2024-06-20 15:25:38,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90369 conditions, 8662 events. 5082/8662 cut-off events. For 2501299/2501303 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 63845 event pairs, 1631 based on Foata normal form. 25/8671 useless extension candidates. Maximal degree in co-relation 90160. Up to 7542 conditions per place. [2024-06-20 15:25:38,577 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 562 selfloop transitions, 44 changer transitions 0/613 dead transitions. [2024-06-20 15:25:38,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 613 transitions, 10884 flow [2024-06-20 15:25:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:38,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:25:38,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-20 15:25:38,578 INFO L175 Difference]: Start difference. First operand has 436 places, 582 transitions, 9314 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:25:38,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 613 transitions, 10884 flow [2024-06-20 15:25:53,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 613 transitions, 10577 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 15:25:53,460 INFO L231 Difference]: Finished difference. Result has 438 places, 582 transitions, 9100 flow [2024-06-20 15:25:53,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9007, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9100, PETRI_PLACES=438, PETRI_TRANSITIONS=582} [2024-06-20 15:25:53,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-20 15:25:53,461 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 582 transitions, 9100 flow [2024-06-20 15:25:53,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:53,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:53,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:53,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:25:53,462 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:53,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:53,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1032820167, now seen corresponding path program 4 times [2024-06-20 15:25:53,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:53,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600358613] [2024-06-20 15:25:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:53,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:53,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:53,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600358613] [2024-06-20 15:25:53,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600358613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:53,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:53,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:25:53,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038047303] [2024-06-20 15:25:53,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:53,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:25:53,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:53,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:25:53,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:25:53,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:53,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 582 transitions, 9100 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:53,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:53,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:53,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:56,147 INFO L124 PetriNetUnfolderBase]: 5021/8553 cut-off events. [2024-06-20 15:25:56,147 INFO L125 PetriNetUnfolderBase]: For 2384417/2384421 co-relation queries the response was YES. [2024-06-20 15:25:56,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86749 conditions, 8553 events. 5021/8553 cut-off events. For 2384417/2384421 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 62888 event pairs, 1615 based on Foata normal form. 25/8562 useless extension candidates. Maximal degree in co-relation 86539. Up to 7542 conditions per place. [2024-06-20 15:25:56,284 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 547 selfloop transitions, 39 changer transitions 19/612 dead transitions. [2024-06-20 15:25:56,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 612 transitions, 10430 flow [2024-06-20 15:25:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:56,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 15:25:56,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:25:56,285 INFO L175 Difference]: Start difference. First operand has 438 places, 582 transitions, 9100 flow. Second operand 8 states and 184 transitions. [2024-06-20 15:25:56,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 612 transitions, 10430 flow [2024-06-20 15:26:08,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 612 transitions, 10313 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:08,929 INFO L231 Difference]: Finished difference. Result has 438 places, 577 transitions, 9006 flow [2024-06-20 15:26:08,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8983, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9006, PETRI_PLACES=438, PETRI_TRANSITIONS=577} [2024-06-20 15:26:08,929 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-20 15:26:08,930 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 577 transitions, 9006 flow [2024-06-20 15:26:08,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:08,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:08,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:08,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 15:26:08,930 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:08,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:08,931 INFO L85 PathProgramCache]: Analyzing trace with hash 809451031, now seen corresponding path program 8 times [2024-06-20 15:26:08,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:08,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299785880] [2024-06-20 15:26:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:08,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:09,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:09,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299785880] [2024-06-20 15:26:09,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299785880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:09,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:09,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:26:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138749008] [2024-06-20 15:26:09,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:09,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:26:09,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:26:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:26:09,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:09,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 577 transitions, 9006 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:09,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:09,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:09,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:11,602 INFO L124 PetriNetUnfolderBase]: 4963/8446 cut-off events. [2024-06-20 15:26:11,602 INFO L125 PetriNetUnfolderBase]: For 2436670/2436674 co-relation queries the response was YES. [2024-06-20 15:26:11,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85992 conditions, 8446 events. 4963/8446 cut-off events. For 2436670/2436674 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 61696 event pairs, 1542 based on Foata normal form. 31/8472 useless extension candidates. Maximal degree in co-relation 85781. Up to 6606 conditions per place. [2024-06-20 15:26:11,736 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 520 selfloop transitions, 79 changer transitions 0/606 dead transitions. [2024-06-20 15:26:11,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 606 transitions, 10593 flow [2024-06-20 15:26:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:11,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:26:11,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-20 15:26:11,737 INFO L175 Difference]: Start difference. First operand has 438 places, 577 transitions, 9006 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:26:11,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 606 transitions, 10593 flow [2024-06-20 15:26:24,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 606 transitions, 10473 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-20 15:26:24,422 INFO L231 Difference]: Finished difference. Result has 432 places, 577 transitions, 9060 flow [2024-06-20 15:26:24,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8892, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9060, PETRI_PLACES=432, PETRI_TRANSITIONS=577} [2024-06-20 15:26:24,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-20 15:26:24,423 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 577 transitions, 9060 flow [2024-06-20 15:26:24,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:24,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:24,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:24,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 15:26:24,423 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:24,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:24,424 INFO L85 PathProgramCache]: Analyzing trace with hash -727111449, now seen corresponding path program 9 times [2024-06-20 15:26:24,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:24,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56166028] [2024-06-20 15:26:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:24,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:24,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:24,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56166028] [2024-06-20 15:26:24,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56166028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:24,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:24,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:26:24,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562326860] [2024-06-20 15:26:24,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:24,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:26:24,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:24,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:26:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:26:24,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:24,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 577 transitions, 9060 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:24,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:24,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:24,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:27,079 INFO L124 PetriNetUnfolderBase]: 4894/8341 cut-off events. [2024-06-20 15:26:27,080 INFO L125 PetriNetUnfolderBase]: For 2189791/2189795 co-relation queries the response was YES. [2024-06-20 15:26:27,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81205 conditions, 8341 events. 4894/8341 cut-off events. For 2189791/2189795 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 61178 event pairs, 1599 based on Foata normal form. 35/8363 useless extension candidates. Maximal degree in co-relation 80997. Up to 7373 conditions per place. [2024-06-20 15:26:27,213 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 516 selfloop transitions, 73 changer transitions 2/598 dead transitions. [2024-06-20 15:26:27,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 598 transitions, 10330 flow [2024-06-20 15:26:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:26:27,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:26:27,228 INFO L175 Difference]: Start difference. First operand has 432 places, 577 transitions, 9060 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:26:27,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 598 transitions, 10330 flow [2024-06-20 15:26:38,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 598 transitions, 10180 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:38,562 INFO L231 Difference]: Finished difference. Result has 434 places, 575 transitions, 9032 flow [2024-06-20 15:26:38,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8910, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9032, PETRI_PLACES=434, PETRI_TRANSITIONS=575} [2024-06-20 15:26:38,563 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-20 15:26:38,563 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 575 transitions, 9032 flow [2024-06-20 15:26:38,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:38,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:38,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:38,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 15:26:38,563 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:38,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:38,564 INFO L85 PathProgramCache]: Analyzing trace with hash -766796457, now seen corresponding path program 5 times [2024-06-20 15:26:38,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:38,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432278664] [2024-06-20 15:26:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:38,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:38,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:38,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432278664] [2024-06-20 15:26:38,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432278664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:38,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:38,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:26:38,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496027063] [2024-06-20 15:26:38,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:38,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:26:38,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:38,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:26:38,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:26:38,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:38,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 575 transitions, 9032 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:38,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:38,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:38,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:41,140 INFO L124 PetriNetUnfolderBase]: 4882/8333 cut-off events. [2024-06-20 15:26:41,140 INFO L125 PetriNetUnfolderBase]: For 2158399/2158403 co-relation queries the response was YES. [2024-06-20 15:26:41,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80389 conditions, 8333 events. 4882/8333 cut-off events. For 2158399/2158403 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 61079 event pairs, 1606 based on Foata normal form. 35/8363 useless extension candidates. Maximal degree in co-relation 80181. Up to 7296 conditions per place. [2024-06-20 15:26:41,271 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 516 selfloop transitions, 66 changer transitions 8/597 dead transitions. [2024-06-20 15:26:41,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 597 transitions, 10329 flow [2024-06-20 15:26:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:26:41,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:26:41,273 INFO L175 Difference]: Start difference. First operand has 434 places, 575 transitions, 9032 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:26:41,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 597 transitions, 10329 flow [2024-06-20 15:26:52,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 597 transitions, 10138 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:52,335 INFO L231 Difference]: Finished difference. Result has 435 places, 570 transitions, 8903 flow [2024-06-20 15:26:52,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8841, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8903, PETRI_PLACES=435, PETRI_TRANSITIONS=570} [2024-06-20 15:26:52,336 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-20 15:26:52,336 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 570 transitions, 8903 flow [2024-06-20 15:26:52,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:52,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:52,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:52,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 15:26:52,337 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:52,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:52,337 INFO L85 PathProgramCache]: Analyzing trace with hash 809451217, now seen corresponding path program 6 times [2024-06-20 15:26:52,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:52,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892819696] [2024-06-20 15:26:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:52,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:52,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:52,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892819696] [2024-06-20 15:26:52,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892819696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:52,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:52,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:26:52,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140420383] [2024-06-20 15:26:52,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:52,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:26:52,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:52,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:26:52,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:26:52,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:52,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 570 transitions, 8903 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:52,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:52,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:52,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:54,808 INFO L124 PetriNetUnfolderBase]: 4672/7977 cut-off events. [2024-06-20 15:26:54,809 INFO L125 PetriNetUnfolderBase]: For 1948120/1948124 co-relation queries the response was YES. [2024-06-20 15:26:54,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75217 conditions, 7977 events. 4672/7977 cut-off events. For 1948120/1948124 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 57903 event pairs, 1408 based on Foata normal form. 31/8003 useless extension candidates. Maximal degree in co-relation 75008. Up to 6606 conditions per place. [2024-06-20 15:26:54,932 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 509 selfloop transitions, 67 changer transitions 15/598 dead transitions. [2024-06-20 15:26:54,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 598 transitions, 10230 flow [2024-06-20 15:26:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:26:54,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 15:26:54,933 INFO L175 Difference]: Start difference. First operand has 435 places, 570 transitions, 8903 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:26:54,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 598 transitions, 10230 flow [2024-06-20 15:27:07,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 598 transitions, 10067 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 15:27:07,180 INFO L231 Difference]: Finished difference. Result has 436 places, 561 transitions, 8742 flow [2024-06-20 15:27:07,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8740, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8742, PETRI_PLACES=436, PETRI_TRANSITIONS=561} [2024-06-20 15:27:07,180 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-20 15:27:07,180 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 561 transitions, 8742 flow [2024-06-20 15:27:07,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:07,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:07,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 15:27:07,181 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:07,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:07,181 INFO L85 PathProgramCache]: Analyzing trace with hash -735220137, now seen corresponding path program 7 times [2024-06-20 15:27:07,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:07,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300401496] [2024-06-20 15:27:07,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:07,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:07,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:07,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300401496] [2024-06-20 15:27:07,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300401496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:07,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:07,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:27:07,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163033793] [2024-06-20 15:27:07,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:07,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:27:07,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:07,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:27:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:27:07,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:27:07,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 561 transitions, 8742 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:07,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:07,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:27:07,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:09,735 INFO L124 PetriNetUnfolderBase]: 4759/8150 cut-off events. [2024-06-20 15:27:09,735 INFO L125 PetriNetUnfolderBase]: For 1891096/1891100 co-relation queries the response was YES. [2024-06-20 15:27:09,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75936 conditions, 8150 events. 4759/8150 cut-off events. For 1891096/1891100 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 59640 event pairs, 1099 based on Foata normal form. 25/8170 useless extension candidates. Maximal degree in co-relation 75726. Up to 5197 conditions per place. [2024-06-20 15:27:09,860 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 453 selfloop transitions, 139 changer transitions 9/608 dead transitions. [2024-06-20 15:27:09,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 608 transitions, 10695 flow [2024-06-20 15:27:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 15:27:09,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.659375 [2024-06-20 15:27:09,862 INFO L175 Difference]: Start difference. First operand has 436 places, 561 transitions, 8742 flow. Second operand 8 states and 211 transitions. [2024-06-20 15:27:09,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 608 transitions, 10695 flow [2024-06-20 15:27:21,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 608 transitions, 10397 flow, removed 10 selfloop flow, removed 17 redundant places. [2024-06-20 15:27:21,066 INFO L231 Difference]: Finished difference. Result has 428 places, 560 transitions, 8816 flow [2024-06-20 15:27:21,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8456, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8816, PETRI_PLACES=428, PETRI_TRANSITIONS=560} [2024-06-20 15:27:21,066 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-20 15:27:21,066 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 560 transitions, 8816 flow [2024-06-20 15:27:21,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:21,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:21,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:21,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 15:27:21,067 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:21,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:21,067 INFO L85 PathProgramCache]: Analyzing trace with hash -734982987, now seen corresponding path program 8 times [2024-06-20 15:27:21,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:21,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663147260] [2024-06-20 15:27:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:21,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:21,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:21,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663147260] [2024-06-20 15:27:21,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663147260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:21,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:21,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:27:21,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976266334] [2024-06-20 15:27:21,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:21,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:27:21,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:21,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:27:21,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:27:21,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:27:21,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 560 transitions, 8816 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:21,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:21,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:27:21,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:23,651 INFO L124 PetriNetUnfolderBase]: 4842/8287 cut-off events. [2024-06-20 15:27:23,651 INFO L125 PetriNetUnfolderBase]: For 1916933/1916937 co-relation queries the response was YES. [2024-06-20 15:27:23,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80298 conditions, 8287 events. 4842/8287 cut-off events. For 1916933/1916937 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 60865 event pairs, 1155 based on Foata normal form. 7/8289 useless extension candidates. Maximal degree in co-relation 80090. Up to 5197 conditions per place. [2024-06-20 15:27:23,781 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 443 selfloop transitions, 144 changer transitions 8/602 dead transitions. [2024-06-20 15:27:23,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 602 transitions, 10734 flow [2024-06-20 15:27:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:27:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:27:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:27:23,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-06-20 15:27:23,782 INFO L175 Difference]: Start difference. First operand has 428 places, 560 transitions, 8816 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:27:23,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 602 transitions, 10734 flow Killed by 15