./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe003_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe003_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe003_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:02:39,196 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:02:39,262 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:02:39,266 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:02:39,266 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:02:39,281 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:02:39,282 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:02:39,282 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:02:39,283 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:02:39,283 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:02:39,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:02:39,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:02:39,284 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:02:39,284 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:02:39,284 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:02:39,285 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:02:39,285 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:02:39,285 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:02:39,286 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:02:39,286 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:02:39,286 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:02:39,287 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:02:39,287 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:02:39,287 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:02:39,288 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:02:39,288 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:02:39,288 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:02:39,289 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:02:39,289 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:02:39,289 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:02:39,290 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:02:39,290 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:02:39,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:02:39,290 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:02:39,291 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:02:39,291 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:02:39,291 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:02:39,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:02:39,291 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:02:39,292 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:02:39,292 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:02:39,292 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:02:39,292 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:02:39,293 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:02:39,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:02:39,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:02:39,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:02:39,552 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:02:39,552 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:02:39,554 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-06-21 20:02:40,744 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:02:40,955 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:02:40,955 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-06-21 20:02:40,968 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/475d1c1a3/c872daea0e414314bb0a176b39184654/FLAG698e3b1ab [2024-06-21 20:02:40,986 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/475d1c1a3/c872daea0e414314bb0a176b39184654 [2024-06-21 20:02:40,990 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:02:40,991 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:02:40,991 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe003_tso.yml/witness.yml [2024-06-21 20:02:41,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:02:41,118 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:02:41,121 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:02:41,121 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:02:41,125 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:02:41,125 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:02:40" (1/2) ... [2024-06-21 20:02:41,126 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612a65d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41, skipping insertion in model container [2024-06-21 20:02:41,126 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:02:40" (1/2) ... [2024-06-21 20:02:41,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d1d6704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:41, skipping insertion in model container [2024-06-21 20:02:41,128 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:41" (2/2) ... [2024-06-21 20:02:41,128 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612a65d6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41, skipping insertion in model container [2024-06-21 20:02:41,128 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:41" (2/2) ... [2024-06-21 20:02:41,129 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:02:41,168 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:02:41,169 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 20:02:41,169 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 20:02:41,170 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 20:02:41,170 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:02:41,170 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-21 20:02:41,204 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:02:41,509 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:02:41,518 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:02:41,620 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:02:41,647 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:02:41,647 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41 WrapperNode [2024-06-21 20:02:41,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:02:41,648 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:02:41,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:02:41,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:02:41,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,682 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,709 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-21 20:02:41,709 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:02:41,710 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:02:41,710 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:02:41,710 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:02:41,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,720 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,748 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:02:41,749 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,749 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,813 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,822 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,824 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:02:41,824 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:02:41,834 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:02:41,834 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:02:41,835 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (1/1) ... [2024-06-21 20:02:41,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:02:41,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:02:41,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:02:41,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:02:41,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:02:41,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:02:41,915 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:02:41,915 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:02:41,915 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:02:41,916 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:02:41,916 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:02:41,916 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:02:41,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:02:41,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:02:41,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:02:41,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:02:41,918 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:02:42,017 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:02:42,018 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:02:42,148 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:02:42,148 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:02:42,205 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:02:42,205 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:02:42,205 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:02:42 BoogieIcfgContainer [2024-06-21 20:02:42,206 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:02:42,207 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:02:42,207 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:02:42,210 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:02:42,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:02:40" (1/4) ... [2024-06-21 20:02:42,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793b1d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:02:42, skipping insertion in model container [2024-06-21 20:02:42,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:41" (2/4) ... [2024-06-21 20:02:42,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793b1d20 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:02:42, skipping insertion in model container [2024-06-21 20:02:42,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:41" (3/4) ... [2024-06-21 20:02:42,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793b1d20 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:02:42, skipping insertion in model container [2024-06-21 20:02:42,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:02:42" (4/4) ... [2024-06-21 20:02:42,212 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_tso.i [2024-06-21 20:02:42,225 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:02:42,226 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:02:42,226 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:02:42,263 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:02:42,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 20:02:42,325 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 20:02:42,325 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:02:42,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:02:42,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 20:02:42,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 20:02:42,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:02:42,348 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;@66e0edb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:02:42,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:02:42,352 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:02:42,352 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:02:42,352 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:02:42,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:42,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:02:42,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:42,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:42,357 INFO L85 PathProgramCache]: Analyzing trace with hash 219930474, now seen corresponding path program 1 times [2024-06-21 20:02:42,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:42,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040955354] [2024-06-21 20:02:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:42,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:42,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:42,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040955354] [2024-06-21 20:02:42,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040955354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:42,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:42,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:02:42,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517762249] [2024-06-21 20:02:42,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:42,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:02:42,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:42,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:02:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:02:42,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 20:02:42,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:42,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:42,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 20:02:42,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:42,962 INFO L124 PetriNetUnfolderBase]: 474/798 cut-off events. [2024-06-21 20:02:42,962 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-21 20:02:42,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 798 events. 474/798 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3918 event pairs, 292 based on Foata normal form. 1/755 useless extension candidates. Maximal degree in co-relation 1595. Up to 744 conditions per place. [2024-06-21 20:02:42,974 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-21 20:02:42,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-21 20:02:42,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:02:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:02:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-21 20:02:42,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-21 20:02:42,986 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-21 20:02:42,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-21 20:02:42,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:42,991 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 20:02:42,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 20:02:43,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 20:02:43,001 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 20:02:43,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:43,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:43,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:02:43,002 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:43,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:43,003 INFO L85 PathProgramCache]: Analyzing trace with hash 899799369, now seen corresponding path program 1 times [2024-06-21 20:02:43,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:43,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484583034] [2024-06-21 20:02:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:43,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:43,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:43,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484583034] [2024-06-21 20:02:43,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484583034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:43,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:43,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:02:43,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647786172] [2024-06-21 20:02:43,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:43,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:02:43,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:43,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:02:43,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:02:43,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:43,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:43,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:43,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:43,362 INFO L124 PetriNetUnfolderBase]: 742/1214 cut-off events. [2024-06-21 20:02:43,363 INFO L125 PetriNetUnfolderBase]: For 234/237 co-relation queries the response was YES. [2024-06-21 20:02:43,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2778 conditions, 1214 events. 742/1214 cut-off events. For 234/237 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5946 event pairs, 380 based on Foata normal form. 7/1214 useless extension candidates. Maximal degree in co-relation 2766. Up to 1086 conditions per place. [2024-06-21 20:02:43,369 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 42 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-21 20:02:43,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 60 transitions, 276 flow [2024-06-21 20:02:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-21 20:02:43,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.69375 [2024-06-21 20:02:43,371 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 111 transitions. [2024-06-21 20:02:43,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 60 transitions, 276 flow [2024-06-21 20:02:43,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 60 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:43,373 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 169 flow [2024-06-21 20:02:43,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-06-21 20:02:43,374 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 20:02:43,374 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 169 flow [2024-06-21 20:02:43,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:43,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:43,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:02:43,375 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:43,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2123977079, now seen corresponding path program 1 times [2024-06-21 20:02:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:43,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079328513] [2024-06-21 20:02:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:43,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:43,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:43,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079328513] [2024-06-21 20:02:43,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079328513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:43,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:43,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:43,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109632154] [2024-06-21 20:02:43,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:43,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:43,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:43,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:43,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:43,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:43,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:43,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:43,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:43,724 INFO L124 PetriNetUnfolderBase]: 926/1520 cut-off events. [2024-06-21 20:02:43,725 INFO L125 PetriNetUnfolderBase]: For 1002/1002 co-relation queries the response was YES. [2024-06-21 20:02:43,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4068 conditions, 1520 events. 926/1520 cut-off events. For 1002/1002 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7475 event pairs, 372 based on Foata normal form. 3/1521 useless extension candidates. Maximal degree in co-relation 4053. Up to 1374 conditions per place. [2024-06-21 20:02:43,733 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 56 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2024-06-21 20:02:43,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 73 transitions, 390 flow [2024-06-21 20:02:43,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:43,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 20:02:43,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-21 20:02:43,735 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 169 flow. Second operand 5 states and 127 transitions. [2024-06-21 20:02:43,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 73 transitions, 390 flow [2024-06-21 20:02:43,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 388 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:43,738 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 254 flow [2024-06-21 20:02:43,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-06-21 20:02:43,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-21 20:02:43,739 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 254 flow [2024-06-21 20:02:43,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:43,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:43,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:02:43,739 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:43,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:43,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1032521654, now seen corresponding path program 1 times [2024-06-21 20:02:43,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:43,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349997596] [2024-06-21 20:02:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:43,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:43,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:43,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349997596] [2024-06-21 20:02:43,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349997596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:43,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:43,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:43,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886271824] [2024-06-21 20:02:43,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:43,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:43,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:43,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:43,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 254 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:43,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:43,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:43,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:44,050 INFO L124 PetriNetUnfolderBase]: 917/1503 cut-off events. [2024-06-21 20:02:44,050 INFO L125 PetriNetUnfolderBase]: For 1558/1558 co-relation queries the response was YES. [2024-06-21 20:02:44,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4482 conditions, 1503 events. 917/1503 cut-off events. For 1558/1558 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7364 event pairs, 251 based on Foata normal form. 6/1507 useless extension candidates. Maximal degree in co-relation 4462. Up to 1329 conditions per place. [2024-06-21 20:02:44,061 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 60 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-06-21 20:02:44,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 466 flow [2024-06-21 20:02:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:02:44,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:02:44,063 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 254 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:02:44,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 466 flow [2024-06-21 20:02:44,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 464 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:44,067 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 289 flow [2024-06-21 20:02:44,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-21 20:02:44,068 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-21 20:02:44,068 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 289 flow [2024-06-21 20:02:44,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:44,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:44,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:02:44,069 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:44,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:44,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1088277451, now seen corresponding path program 1 times [2024-06-21 20:02:44,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:44,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393230192] [2024-06-21 20:02:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:44,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:44,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:44,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393230192] [2024-06-21 20:02:44,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393230192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:44,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:44,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:44,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123931822] [2024-06-21 20:02:44,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:44,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:44,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:44,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:44,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:44,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:44,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:44,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:44,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:44,329 INFO L124 PetriNetUnfolderBase]: 904/1470 cut-off events. [2024-06-21 20:02:44,329 INFO L125 PetriNetUnfolderBase]: For 2292/2303 co-relation queries the response was YES. [2024-06-21 20:02:44,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4689 conditions, 1470 events. 904/1470 cut-off events. For 2292/2303 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7201 event pairs, 348 based on Foata normal form. 12/1476 useless extension candidates. Maximal degree in co-relation 4666. Up to 1305 conditions per place. [2024-06-21 20:02:44,338 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 45 selfloop transitions, 14 changer transitions 0/66 dead transitions. [2024-06-21 20:02:44,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 446 flow [2024-06-21 20:02:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-21 20:02:44,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:02:44,339 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 289 flow. Second operand 4 states and 102 transitions. [2024-06-21 20:02:44,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 446 flow [2024-06-21 20:02:44,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 419 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:44,343 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 324 flow [2024-06-21 20:02:44,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=324, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-21 20:02:44,344 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-21 20:02:44,360 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 324 flow [2024-06-21 20:02:44,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:44,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:44,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:02:44,361 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:44,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:44,361 INFO L85 PathProgramCache]: Analyzing trace with hash -958029466, now seen corresponding path program 1 times [2024-06-21 20:02:44,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:44,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521279137] [2024-06-21 20:02:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:44,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:44,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:44,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521279137] [2024-06-21 20:02:44,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521279137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:44,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:44,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:44,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083304447] [2024-06-21 20:02:44,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:44,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:44,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:44,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:44,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:44,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:44,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 324 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:44,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:44,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:44,739 INFO L124 PetriNetUnfolderBase]: 931/1524 cut-off events. [2024-06-21 20:02:44,739 INFO L125 PetriNetUnfolderBase]: For 2825/2825 co-relation queries the response was YES. [2024-06-21 20:02:44,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5039 conditions, 1524 events. 931/1524 cut-off events. For 2825/2825 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7512 event pairs, 315 based on Foata normal form. 2/1517 useless extension candidates. Maximal degree in co-relation 5014. Up to 1275 conditions per place. [2024-06-21 20:02:44,749 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 60 selfloop transitions, 27 changer transitions 0/94 dead transitions. [2024-06-21 20:02:44,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 666 flow [2024-06-21 20:02:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 20:02:44,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-21 20:02:44,751 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 324 flow. Second operand 6 states and 158 transitions. [2024-06-21 20:02:44,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 666 flow [2024-06-21 20:02:44,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 94 transitions, 651 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:44,756 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 435 flow [2024-06-21 20:02:44,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=435, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-21 20:02:44,757 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-06-21 20:02:44,757 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 435 flow [2024-06-21 20:02:44,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:44,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:44,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:02:44,758 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:44,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:44,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1104153096, now seen corresponding path program 2 times [2024-06-21 20:02:44,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:44,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808849706] [2024-06-21 20:02:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:44,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:44,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:44,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808849706] [2024-06-21 20:02:44,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808849706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:44,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:44,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:44,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881530835] [2024-06-21 20:02:44,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:44,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:44,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:44,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:44,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:44,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:44,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:44,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:44,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:44,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:45,067 INFO L124 PetriNetUnfolderBase]: 953/1565 cut-off events. [2024-06-21 20:02:45,067 INFO L125 PetriNetUnfolderBase]: For 4244/4244 co-relation queries the response was YES. [2024-06-21 20:02:45,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5698 conditions, 1565 events. 953/1565 cut-off events. For 4244/4244 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7732 event pairs, 314 based on Foata normal form. 2/1560 useless extension candidates. Maximal degree in co-relation 5671. Up to 1358 conditions per place. [2024-06-21 20:02:45,075 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 64 selfloop transitions, 22 changer transitions 0/93 dead transitions. [2024-06-21 20:02:45,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 721 flow [2024-06-21 20:02:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:45,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:45,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:02:45,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 20:02:45,076 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 435 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:02:45,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 721 flow [2024-06-21 20:02:45,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 691 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:45,082 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 521 flow [2024-06-21 20:02:45,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=521, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-06-21 20:02:45,083 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-21 20:02:45,083 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 521 flow [2024-06-21 20:02:45,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:45,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:45,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:02:45,084 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:45,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:45,084 INFO L85 PathProgramCache]: Analyzing trace with hash 936426212, now seen corresponding path program 3 times [2024-06-21 20:02:45,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:45,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431347234] [2024-06-21 20:02:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:45,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:45,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:45,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431347234] [2024-06-21 20:02:45,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431347234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:45,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:45,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:45,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653764630] [2024-06-21 20:02:45,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:45,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:45,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:45,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:45,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:45,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:45,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 521 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:45,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:45,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:45,388 INFO L124 PetriNetUnfolderBase]: 959/1579 cut-off events. [2024-06-21 20:02:45,388 INFO L125 PetriNetUnfolderBase]: For 5340/5340 co-relation queries the response was YES. [2024-06-21 20:02:45,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5941 conditions, 1579 events. 959/1579 cut-off events. For 5340/5340 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7855 event pairs, 314 based on Foata normal form. 4/1576 useless extension candidates. Maximal degree in co-relation 5911. Up to 1313 conditions per place. [2024-06-21 20:02:45,398 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 63 selfloop transitions, 31 changer transitions 0/101 dead transitions. [2024-06-21 20:02:45,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 101 transitions, 827 flow [2024-06-21 20:02:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 20:02:45,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-21 20:02:45,400 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 521 flow. Second operand 6 states and 155 transitions. [2024-06-21 20:02:45,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 101 transitions, 827 flow [2024-06-21 20:02:45,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 769 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:45,409 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 576 flow [2024-06-21 20:02:45,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=576, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-21 20:02:45,409 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 20:02:45,410 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 576 flow [2024-06-21 20:02:45,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:45,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:45,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:02:45,410 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:45,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:45,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1409483106, now seen corresponding path program 1 times [2024-06-21 20:02:45,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:45,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312482355] [2024-06-21 20:02:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:45,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:45,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:45,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312482355] [2024-06-21 20:02:45,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312482355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:45,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:45,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:45,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217597194] [2024-06-21 20:02:45,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:45,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:45,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:45,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:45,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:45,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:45,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 576 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:45,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:45,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:45,709 INFO L124 PetriNetUnfolderBase]: 968/1599 cut-off events. [2024-06-21 20:02:45,710 INFO L125 PetriNetUnfolderBase]: For 6823/6837 co-relation queries the response was YES. [2024-06-21 20:02:45,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6194 conditions, 1599 events. 968/1599 cut-off events. For 6823/6837 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8023 event pairs, 295 based on Foata normal form. 18/1610 useless extension candidates. Maximal degree in co-relation 6162. Up to 1355 conditions per place. [2024-06-21 20:02:45,720 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 66 selfloop transitions, 20 changer transitions 0/93 dead transitions. [2024-06-21 20:02:45,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 808 flow [2024-06-21 20:02:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-21 20:02:45,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-21 20:02:45,721 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 576 flow. Second operand 5 states and 124 transitions. [2024-06-21 20:02:45,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 808 flow [2024-06-21 20:02:45,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 744 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:45,730 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 586 flow [2024-06-21 20:02:45,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=586, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-06-21 20:02:45,731 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-21 20:02:45,731 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 586 flow [2024-06-21 20:02:45,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:45,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:45,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:02:45,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:45,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:45,732 INFO L85 PathProgramCache]: Analyzing trace with hash 365858918, now seen corresponding path program 1 times [2024-06-21 20:02:45,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:45,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730147332] [2024-06-21 20:02:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:45,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:45,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:45,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730147332] [2024-06-21 20:02:45,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730147332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:45,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:45,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:45,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696284566] [2024-06-21 20:02:45,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:45,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:45,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:45,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:45,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:45,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:45,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 586 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:45,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:45,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:45,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:46,026 INFO L124 PetriNetUnfolderBase]: 963/1587 cut-off events. [2024-06-21 20:02:46,026 INFO L125 PetriNetUnfolderBase]: For 6648/6659 co-relation queries the response was YES. [2024-06-21 20:02:46,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6286 conditions, 1587 events. 963/1587 cut-off events. For 6648/6659 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7916 event pairs, 324 based on Foata normal form. 10/1589 useless extension candidates. Maximal degree in co-relation 6253. Up to 1303 conditions per place. [2024-06-21 20:02:46,034 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 64 selfloop transitions, 30 changer transitions 0/101 dead transitions. [2024-06-21 20:02:46,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 101 transitions, 866 flow [2024-06-21 20:02:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:02:46,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:02:46,036 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 586 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:02:46,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 101 transitions, 866 flow [2024-06-21 20:02:46,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 816 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:46,044 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 604 flow [2024-06-21 20:02:46,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=604, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-06-21 20:02:46,045 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-21 20:02:46,045 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 604 flow [2024-06-21 20:02:46,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:46,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:46,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:02:46,046 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:46,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:46,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1114055078, now seen corresponding path program 2 times [2024-06-21 20:02:46,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:46,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692083534] [2024-06-21 20:02:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:46,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:46,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:46,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692083534] [2024-06-21 20:02:46,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692083534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:46,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:46,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:46,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831753495] [2024-06-21 20:02:46,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:46,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:46,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:46,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:46,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:46,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:46,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 604 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:46,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:46,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:46,332 INFO L124 PetriNetUnfolderBase]: 974/1608 cut-off events. [2024-06-21 20:02:46,333 INFO L125 PetriNetUnfolderBase]: For 7787/7798 co-relation queries the response was YES. [2024-06-21 20:02:46,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6487 conditions, 1608 events. 974/1608 cut-off events. For 7787/7798 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8056 event pairs, 324 based on Foata normal form. 10/1610 useless extension candidates. Maximal degree in co-relation 6453. Up to 1333 conditions per place. [2024-06-21 20:02:46,342 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 64 selfloop transitions, 29 changer transitions 0/100 dead transitions. [2024-06-21 20:02:46,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 100 transitions, 906 flow [2024-06-21 20:02:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 20:02:46,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-21 20:02:46,343 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 604 flow. Second operand 5 states and 129 transitions. [2024-06-21 20:02:46,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 100 transitions, 906 flow [2024-06-21 20:02:46,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 797 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:46,353 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 592 flow [2024-06-21 20:02:46,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=592, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-21 20:02:46,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-21 20:02:46,354 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 592 flow [2024-06-21 20:02:46,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:46,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:46,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:02:46,354 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:46,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:46,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1114060658, now seen corresponding path program 3 times [2024-06-21 20:02:46,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:46,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301146562] [2024-06-21 20:02:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:46,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:46,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:46,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301146562] [2024-06-21 20:02:46,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301146562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:46,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:46,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:46,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063599813] [2024-06-21 20:02:46,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:46,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:46,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:46,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:46,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 592 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:46,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:46,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:46,647 INFO L124 PetriNetUnfolderBase]: 969/1603 cut-off events. [2024-06-21 20:02:46,647 INFO L125 PetriNetUnfolderBase]: For 8534/8548 co-relation queries the response was YES. [2024-06-21 20:02:46,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6483 conditions, 1603 events. 969/1603 cut-off events. For 8534/8548 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8024 event pairs, 316 based on Foata normal form. 12/1608 useless extension candidates. Maximal degree in co-relation 6450. Up to 1328 conditions per place. [2024-06-21 20:02:46,656 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 66 selfloop transitions, 33 changer transitions 0/106 dead transitions. [2024-06-21 20:02:46,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 106 transitions, 856 flow [2024-06-21 20:02:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:02:46,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:02:46,657 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 592 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:02:46,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 106 transitions, 856 flow [2024-06-21 20:02:46,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 106 transitions, 808 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:46,668 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 618 flow [2024-06-21 20:02:46,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=618, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2024-06-21 20:02:46,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-21 20:02:46,669 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 618 flow [2024-06-21 20:02:46,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:46,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:46,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:02:46,669 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:46,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:46,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1546136027, now seen corresponding path program 1 times [2024-06-21 20:02:46,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:46,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251465938] [2024-06-21 20:02:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:46,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:46,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:46,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251465938] [2024-06-21 20:02:46,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251465938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:46,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:46,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:46,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336508022] [2024-06-21 20:02:46,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:46,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:46,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:46,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:46,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:46,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:46,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 618 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:46,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:46,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:46,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:47,021 INFO L124 PetriNetUnfolderBase]: 1072/1755 cut-off events. [2024-06-21 20:02:47,021 INFO L125 PetriNetUnfolderBase]: For 11190/11190 co-relation queries the response was YES. [2024-06-21 20:02:47,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7399 conditions, 1755 events. 1072/1755 cut-off events. For 11190/11190 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8873 event pairs, 227 based on Foata normal form. 4/1748 useless extension candidates. Maximal degree in co-relation 7365. Up to 1264 conditions per place. [2024-06-21 20:02:47,031 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 69 selfloop transitions, 44 changer transitions 0/120 dead transitions. [2024-06-21 20:02:47,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 120 transitions, 1024 flow [2024-06-21 20:02:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:02:47,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-21 20:02:47,033 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 618 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:02:47,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 120 transitions, 1024 flow [2024-06-21 20:02:47,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 120 transitions, 936 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:02:47,049 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 669 flow [2024-06-21 20:02:47,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=669, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-21 20:02:47,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-21 20:02:47,050 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 669 flow [2024-06-21 20:02:47,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:47,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:47,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:02:47,051 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:47,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:47,051 INFO L85 PathProgramCache]: Analyzing trace with hash 118948389, now seen corresponding path program 2 times [2024-06-21 20:02:47,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:47,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311030302] [2024-06-21 20:02:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:47,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:47,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:47,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311030302] [2024-06-21 20:02:47,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311030302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:47,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:47,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:47,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477332355] [2024-06-21 20:02:47,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:47,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:47,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:47,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:47,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:47,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 669 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:47,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:47,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:47,394 INFO L124 PetriNetUnfolderBase]: 1089/1782 cut-off events. [2024-06-21 20:02:47,394 INFO L125 PetriNetUnfolderBase]: For 13181/13181 co-relation queries the response was YES. [2024-06-21 20:02:47,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7812 conditions, 1782 events. 1089/1782 cut-off events. For 13181/13181 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9057 event pairs, 313 based on Foata normal form. 4/1775 useless extension candidates. Maximal degree in co-relation 7777. Up to 1488 conditions per place. [2024-06-21 20:02:47,404 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 68 selfloop transitions, 41 changer transitions 0/116 dead transitions. [2024-06-21 20:02:47,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 987 flow [2024-06-21 20:02:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:47,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:02:47,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:02:47,406 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 669 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:02:47,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 987 flow [2024-06-21 20:02:47,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 116 transitions, 922 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:47,424 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 721 flow [2024-06-21 20:02:47,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=721, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-06-21 20:02:47,425 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-21 20:02:47,425 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 721 flow [2024-06-21 20:02:47,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:47,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:47,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:02:47,426 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:47,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:47,426 INFO L85 PathProgramCache]: Analyzing trace with hash -386090205, now seen corresponding path program 3 times [2024-06-21 20:02:47,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:47,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567311988] [2024-06-21 20:02:47,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:47,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:47,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:47,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567311988] [2024-06-21 20:02:47,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567311988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:47,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:47,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:47,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234133887] [2024-06-21 20:02:47,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:47,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:47,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:47,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:47,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:47,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 721 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:47,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:47,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:47,823 INFO L124 PetriNetUnfolderBase]: 1106/1815 cut-off events. [2024-06-21 20:02:47,823 INFO L125 PetriNetUnfolderBase]: For 15359/15359 co-relation queries the response was YES. [2024-06-21 20:02:47,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8229 conditions, 1815 events. 1106/1815 cut-off events. For 15359/15359 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9256 event pairs, 301 based on Foata normal form. 4/1812 useless extension candidates. Maximal degree in co-relation 8192. Up to 1589 conditions per place. [2024-06-21 20:02:47,833 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 84 selfloop transitions, 24 changer transitions 0/115 dead transitions. [2024-06-21 20:02:47,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 1033 flow [2024-06-21 20:02:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:02:47,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:02:47,835 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 721 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:02:47,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 1033 flow [2024-06-21 20:02:47,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 115 transitions, 938 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:47,852 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 713 flow [2024-06-21 20:02:47,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=713, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2024-06-21 20:02:47,853 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-21 20:02:47,853 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 713 flow [2024-06-21 20:02:47,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:47,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:47,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:02:47,854 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:47,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:47,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1370740891, now seen corresponding path program 1 times [2024-06-21 20:02:47,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:47,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291365513] [2024-06-21 20:02:47,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:47,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:47,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:47,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291365513] [2024-06-21 20:02:47,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291365513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:47,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:47,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:47,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901750743] [2024-06-21 20:02:47,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:47,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:47,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:47,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:47,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:47,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:47,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 713 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:47,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:47,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:47,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:48,130 INFO L124 PetriNetUnfolderBase]: 1071/1772 cut-off events. [2024-06-21 20:02:48,130 INFO L125 PetriNetUnfolderBase]: For 17109/17109 co-relation queries the response was YES. [2024-06-21 20:02:48,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8141 conditions, 1772 events. 1071/1772 cut-off events. For 17109/17109 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9167 event pairs, 292 based on Foata normal form. 3/1754 useless extension candidates. Maximal degree in co-relation 8103. Up to 1511 conditions per place. [2024-06-21 20:02:48,140 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 79 selfloop transitions, 28 changer transitions 0/119 dead transitions. [2024-06-21 20:02:48,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 119 transitions, 1107 flow [2024-06-21 20:02:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:48,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:48,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 20:02:48,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:02:48,142 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 713 flow. Second operand 5 states and 130 transitions. [2024-06-21 20:02:48,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 119 transitions, 1107 flow [2024-06-21 20:02:48,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 119 transitions, 1042 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:48,163 INFO L231 Difference]: Finished difference. Result has 87 places, 101 transitions, 816 flow [2024-06-21 20:02:48,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=816, PETRI_PLACES=87, PETRI_TRANSITIONS=101} [2024-06-21 20:02:48,163 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-21 20:02:48,164 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 101 transitions, 816 flow [2024-06-21 20:02:48,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:48,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:48,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:48,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:02:48,166 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:48,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:48,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2037506013, now seen corresponding path program 4 times [2024-06-21 20:02:48,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:48,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359790441] [2024-06-21 20:02:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:48,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:48,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:48,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359790441] [2024-06-21 20:02:48,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359790441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:48,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:48,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:48,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233880253] [2024-06-21 20:02:48,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:48,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:48,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:48,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:48,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:48,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:48,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 101 transitions, 816 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:48,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:48,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:48,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:48,566 INFO L124 PetriNetUnfolderBase]: 1093/1791 cut-off events. [2024-06-21 20:02:48,566 INFO L125 PetriNetUnfolderBase]: For 18924/18924 co-relation queries the response was YES. [2024-06-21 20:02:48,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8360 conditions, 1791 events. 1093/1791 cut-off events. For 18924/18924 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9084 event pairs, 196 based on Foata normal form. 20/1804 useless extension candidates. Maximal degree in co-relation 8320. Up to 1369 conditions per place. [2024-06-21 20:02:48,578 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 87 selfloop transitions, 40 changer transitions 0/134 dead transitions. [2024-06-21 20:02:48,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 134 transitions, 1162 flow [2024-06-21 20:02:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:02:48,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-21 20:02:48,580 INFO L175 Difference]: Start difference. First operand has 87 places, 101 transitions, 816 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:02:48,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 134 transitions, 1162 flow [2024-06-21 20:02:48,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 134 transitions, 1136 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:48,605 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 884 flow [2024-06-21 20:02:48,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=884, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-06-21 20:02:48,606 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-21 20:02:48,606 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 884 flow [2024-06-21 20:02:48,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:48,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:48,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:48,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:02:48,607 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:48,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:48,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1607104067, now seen corresponding path program 1 times [2024-06-21 20:02:48,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:48,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311634936] [2024-06-21 20:02:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:48,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:48,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:48,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311634936] [2024-06-21 20:02:48,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311634936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:48,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:48,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:48,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708874123] [2024-06-21 20:02:48,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:48,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:48,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:48,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:48,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:48,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:48,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 884 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:48,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:48,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:48,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:48,940 INFO L124 PetriNetUnfolderBase]: 1110/1818 cut-off events. [2024-06-21 20:02:48,940 INFO L125 PetriNetUnfolderBase]: For 19375/19375 co-relation queries the response was YES. [2024-06-21 20:02:48,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8757 conditions, 1818 events. 1110/1818 cut-off events. For 19375/19375 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9232 event pairs, 287 based on Foata normal form. 4/1815 useless extension candidates. Maximal degree in co-relation 8714. Up to 1601 conditions per place. [2024-06-21 20:02:48,949 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 95 selfloop transitions, 20 changer transitions 0/122 dead transitions. [2024-06-21 20:02:48,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 1184 flow [2024-06-21 20:02:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 20:02:48,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-21 20:02:48,951 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 884 flow. Second operand 5 states and 127 transitions. [2024-06-21 20:02:48,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 1184 flow [2024-06-21 20:02:48,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 122 transitions, 1093 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:48,973 INFO L231 Difference]: Finished difference. Result has 93 places, 103 transitions, 866 flow [2024-06-21 20:02:48,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=93, PETRI_TRANSITIONS=103} [2024-06-21 20:02:48,974 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-06-21 20:02:48,974 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 103 transitions, 866 flow [2024-06-21 20:02:48,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:48,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:48,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:48,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:02:48,975 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:48,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1598533187, now seen corresponding path program 2 times [2024-06-21 20:02:48,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:48,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717686623] [2024-06-21 20:02:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:48,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:49,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:49,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717686623] [2024-06-21 20:02:49,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717686623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:49,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:49,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:49,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653921603] [2024-06-21 20:02:49,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:49,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:49,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:49,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:49,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:49,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 103 transitions, 866 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:49,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:49,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:49,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:49,253 INFO L124 PetriNetUnfolderBase]: 1102/1813 cut-off events. [2024-06-21 20:02:49,254 INFO L125 PetriNetUnfolderBase]: For 19057/19068 co-relation queries the response was YES. [2024-06-21 20:02:49,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8604 conditions, 1813 events. 1102/1813 cut-off events. For 19057/19068 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9247 event pairs, 275 based on Foata normal form. 12/1817 useless extension candidates. Maximal degree in co-relation 8560. Up to 1530 conditions per place. [2024-06-21 20:02:49,265 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 95 selfloop transitions, 20 changer transitions 0/122 dead transitions. [2024-06-21 20:02:49,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 122 transitions, 1164 flow [2024-06-21 20:02:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 20:02:49,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-21 20:02:49,266 INFO L175 Difference]: Start difference. First operand has 93 places, 103 transitions, 866 flow. Second operand 5 states and 123 transitions. [2024-06-21 20:02:49,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 122 transitions, 1164 flow [2024-06-21 20:02:49,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 122 transitions, 1109 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:49,287 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 888 flow [2024-06-21 20:02:49,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=888, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-06-21 20:02:49,288 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-21 20:02:49,288 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 888 flow [2024-06-21 20:02:49,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:49,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:49,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:49,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:02:49,289 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:49,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:49,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1979878801, now seen corresponding path program 2 times [2024-06-21 20:02:49,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:49,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535185424] [2024-06-21 20:02:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:49,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:49,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:49,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535185424] [2024-06-21 20:02:49,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535185424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:49,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:49,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:49,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851029324] [2024-06-21 20:02:49,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:49,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:49,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:49,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:49,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:49,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:49,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 888 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:49,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:49,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:49,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:49,591 INFO L124 PetriNetUnfolderBase]: 1092/1813 cut-off events. [2024-06-21 20:02:49,592 INFO L125 PetriNetUnfolderBase]: For 21175/21175 co-relation queries the response was YES. [2024-06-21 20:02:49,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8844 conditions, 1813 events. 1092/1813 cut-off events. For 21175/21175 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9399 event pairs, 272 based on Foata normal form. 6/1802 useless extension candidates. Maximal degree in co-relation 8799. Up to 1536 conditions per place. [2024-06-21 20:02:49,603 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 91 selfloop transitions, 37 changer transitions 0/140 dead transitions. [2024-06-21 20:02:49,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 140 transitions, 1353 flow [2024-06-21 20:02:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 20:02:49,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.67 [2024-06-21 20:02:49,604 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 888 flow. Second operand 5 states and 134 transitions. [2024-06-21 20:02:49,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 140 transitions, 1353 flow [2024-06-21 20:02:49,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 140 transitions, 1294 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:49,632 INFO L231 Difference]: Finished difference. Result has 98 places, 120 transitions, 1093 flow [2024-06-21 20:02:49,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1093, PETRI_PLACES=98, PETRI_TRANSITIONS=120} [2024-06-21 20:02:49,633 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-21 20:02:49,633 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 120 transitions, 1093 flow [2024-06-21 20:02:49,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:49,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:49,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:49,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:02:49,634 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:49,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:49,634 INFO L85 PathProgramCache]: Analyzing trace with hash -696131705, now seen corresponding path program 1 times [2024-06-21 20:02:49,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:49,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313402845] [2024-06-21 20:02:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:49,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:49,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:49,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313402845] [2024-06-21 20:02:49,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313402845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:49,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:49,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:49,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72579827] [2024-06-21 20:02:49,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:49,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:49,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:49,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:49,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:49,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:49,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 120 transitions, 1093 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:49,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:49,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:49,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:50,050 INFO L124 PetriNetUnfolderBase]: 1254/2077 cut-off events. [2024-06-21 20:02:50,051 INFO L125 PetriNetUnfolderBase]: For 28432/28443 co-relation queries the response was YES. [2024-06-21 20:02:50,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10615 conditions, 2077 events. 1254/2077 cut-off events. For 28432/28443 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11119 event pairs, 230 based on Foata normal form. 20/2089 useless extension candidates. Maximal degree in co-relation 10568. Up to 1322 conditions per place. [2024-06-21 20:02:50,063 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 111 selfloop transitions, 40 changer transitions 0/158 dead transitions. [2024-06-21 20:02:50,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 158 transitions, 1605 flow [2024-06-21 20:02:50,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:02:50,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:02:50,064 INFO L175 Difference]: Start difference. First operand has 98 places, 120 transitions, 1093 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:02:50,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 158 transitions, 1605 flow [2024-06-21 20:02:50,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 158 transitions, 1583 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:50,095 INFO L231 Difference]: Finished difference. Result has 104 places, 122 transitions, 1195 flow [2024-06-21 20:02:50,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1195, PETRI_PLACES=104, PETRI_TRANSITIONS=122} [2024-06-21 20:02:50,096 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-21 20:02:50,096 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 122 transitions, 1195 flow [2024-06-21 20:02:50,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:50,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:50,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:50,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:02:50,097 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:50,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:50,097 INFO L85 PathProgramCache]: Analyzing trace with hash -597009529, now seen corresponding path program 2 times [2024-06-21 20:02:50,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:50,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020479764] [2024-06-21 20:02:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:50,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:50,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:50,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020479764] [2024-06-21 20:02:50,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020479764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:50,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:50,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:50,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614741163] [2024-06-21 20:02:50,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:50,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:50,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:50,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:50,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:50,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:50,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 122 transitions, 1195 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:50,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:50,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:50,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:50,503 INFO L124 PetriNetUnfolderBase]: 1381/2290 cut-off events. [2024-06-21 20:02:50,504 INFO L125 PetriNetUnfolderBase]: For 35355/35366 co-relation queries the response was YES. [2024-06-21 20:02:50,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12155 conditions, 2290 events. 1381/2290 cut-off events. For 35355/35366 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12573 event pairs, 359 based on Foata normal form. 20/2302 useless extension candidates. Maximal degree in co-relation 12106. Up to 1766 conditions per place. [2024-06-21 20:02:50,519 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 116 selfloop transitions, 36 changer transitions 0/159 dead transitions. [2024-06-21 20:02:50,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 159 transitions, 1715 flow [2024-06-21 20:02:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:50,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:02:50,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:02:50,521 INFO L175 Difference]: Start difference. First operand has 104 places, 122 transitions, 1195 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:02:50,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 159 transitions, 1715 flow [2024-06-21 20:02:50,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 159 transitions, 1665 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:50,561 INFO L231 Difference]: Finished difference. Result has 108 places, 124 transitions, 1265 flow [2024-06-21 20:02:50,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1265, PETRI_PLACES=108, PETRI_TRANSITIONS=124} [2024-06-21 20:02:50,562 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-21 20:02:50,562 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 124 transitions, 1265 flow [2024-06-21 20:02:50,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:50,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:50,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:50,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:02:50,563 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:50,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:50,564 INFO L85 PathProgramCache]: Analyzing trace with hash -596861659, now seen corresponding path program 3 times [2024-06-21 20:02:50,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:50,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076535029] [2024-06-21 20:02:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:50,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:50,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:50,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076535029] [2024-06-21 20:02:50,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076535029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:50,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:50,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:50,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802756897] [2024-06-21 20:02:50,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:50,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:50,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:50,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:50,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:50,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:50,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 124 transitions, 1265 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:50,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:50,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:50,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:51,006 INFO L124 PetriNetUnfolderBase]: 1353/2246 cut-off events. [2024-06-21 20:02:51,006 INFO L125 PetriNetUnfolderBase]: For 36453/36464 co-relation queries the response was YES. [2024-06-21 20:02:51,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11923 conditions, 2246 events. 1353/2246 cut-off events. For 36453/36464 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12262 event pairs, 358 based on Foata normal form. 24/2262 useless extension candidates. Maximal degree in co-relation 11872. Up to 1845 conditions per place. [2024-06-21 20:02:51,027 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 113 selfloop transitions, 34 changer transitions 0/154 dead transitions. [2024-06-21 20:02:51,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 154 transitions, 1645 flow [2024-06-21 20:02:51,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:02:51,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 20:02:51,029 INFO L175 Difference]: Start difference. First operand has 108 places, 124 transitions, 1265 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:02:51,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 154 transitions, 1645 flow [2024-06-21 20:02:51,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 154 transitions, 1588 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:51,087 INFO L231 Difference]: Finished difference. Result has 112 places, 124 transitions, 1283 flow [2024-06-21 20:02:51,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1283, PETRI_PLACES=112, PETRI_TRANSITIONS=124} [2024-06-21 20:02:51,088 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-21 20:02:51,088 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 124 transitions, 1283 flow [2024-06-21 20:02:51,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:51,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:51,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:51,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:02:51,089 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:51,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash -93838727, now seen corresponding path program 1 times [2024-06-21 20:02:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:51,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739677509] [2024-06-21 20:02:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:51,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:51,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:51,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739677509] [2024-06-21 20:02:51,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739677509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:51,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:51,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:51,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543000690] [2024-06-21 20:02:51,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:51,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:51,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:51,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:51,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:51,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:51,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 124 transitions, 1283 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:51,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:51,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:51,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:51,423 INFO L124 PetriNetUnfolderBase]: 1358/2269 cut-off events. [2024-06-21 20:02:51,423 INFO L125 PetriNetUnfolderBase]: For 35027/35027 co-relation queries the response was YES. [2024-06-21 20:02:51,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12103 conditions, 2269 events. 1358/2269 cut-off events. For 35027/35027 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12473 event pairs, 329 based on Foata normal form. 1/2268 useless extension candidates. Maximal degree in co-relation 12050. Up to 2053 conditions per place. [2024-06-21 20:02:51,436 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 132 selfloop transitions, 22 changer transitions 0/161 dead transitions. [2024-06-21 20:02:51,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 161 transitions, 1779 flow [2024-06-21 20:02:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:02:51,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:02:51,437 INFO L175 Difference]: Start difference. First operand has 112 places, 124 transitions, 1283 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:02:51,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 161 transitions, 1779 flow [2024-06-21 20:02:51,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 161 transitions, 1706 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:51,487 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 1381 flow [2024-06-21 20:02:51,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1381, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2024-06-21 20:02:51,487 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-21 20:02:51,488 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 1381 flow [2024-06-21 20:02:51,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:51,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:51,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:51,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:02:51,488 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:51,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:51,489 INFO L85 PathProgramCache]: Analyzing trace with hash 916254695, now seen corresponding path program 4 times [2024-06-21 20:02:51,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:51,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231442228] [2024-06-21 20:02:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:51,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:51,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:51,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231442228] [2024-06-21 20:02:51,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231442228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:51,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:51,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:51,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501672088] [2024-06-21 20:02:51,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:51,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:51,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:51,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:51,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:51,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:51,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 1381 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:51,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:51,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:51,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:51,896 INFO L124 PetriNetUnfolderBase]: 1416/2371 cut-off events. [2024-06-21 20:02:51,896 INFO L125 PetriNetUnfolderBase]: For 42250/42261 co-relation queries the response was YES. [2024-06-21 20:02:51,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12843 conditions, 2371 events. 1416/2371 cut-off events. For 42250/42261 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13285 event pairs, 369 based on Foata normal form. 24/2387 useless extension candidates. Maximal degree in co-relation 12787. Up to 1968 conditions per place. [2024-06-21 20:02:51,914 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 128 selfloop transitions, 30 changer transitions 0/165 dead transitions. [2024-06-21 20:02:51,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 165 transitions, 1797 flow [2024-06-21 20:02:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:02:51,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:02:51,915 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 1381 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:02:51,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 165 transitions, 1797 flow [2024-06-21 20:02:51,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 165 transitions, 1777 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:51,970 INFO L231 Difference]: Finished difference. Result has 120 places, 139 transitions, 1452 flow [2024-06-21 20:02:51,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1452, PETRI_PLACES=120, PETRI_TRANSITIONS=139} [2024-06-21 20:02:51,971 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-21 20:02:51,971 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 139 transitions, 1452 flow [2024-06-21 20:02:51,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:51,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:51,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:51,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:02:51,972 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:51,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:51,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1165472049, now seen corresponding path program 5 times [2024-06-21 20:02:51,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:51,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418472239] [2024-06-21 20:02:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:51,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:52,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418472239] [2024-06-21 20:02:52,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418472239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:52,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:52,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:52,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120544065] [2024-06-21 20:02:52,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:52,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:52,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:52,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:52,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:52,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:52,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 139 transitions, 1452 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:52,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:52,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:52,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:52,416 INFO L124 PetriNetUnfolderBase]: 1449/2442 cut-off events. [2024-06-21 20:02:52,416 INFO L125 PetriNetUnfolderBase]: For 45782/45796 co-relation queries the response was YES. [2024-06-21 20:02:52,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13284 conditions, 2442 events. 1449/2442 cut-off events. For 45782/45796 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13891 event pairs, 374 based on Foata normal form. 26/2461 useless extension candidates. Maximal degree in co-relation 13225. Up to 2027 conditions per place. [2024-06-21 20:02:52,433 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-21 20:02:52,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 174 transitions, 1908 flow [2024-06-21 20:02:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:52,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 20:02:52,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-21 20:02:52,435 INFO L175 Difference]: Start difference. First operand has 120 places, 139 transitions, 1452 flow. Second operand 8 states and 193 transitions. [2024-06-21 20:02:52,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 174 transitions, 1908 flow [2024-06-21 20:02:52,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 174 transitions, 1839 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:52,497 INFO L231 Difference]: Finished difference. Result has 124 places, 140 transitions, 1484 flow [2024-06-21 20:02:52,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1484, PETRI_PLACES=124, PETRI_TRANSITIONS=140} [2024-06-21 20:02:52,497 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-21 20:02:52,497 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 140 transitions, 1484 flow [2024-06-21 20:02:52,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:52,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:52,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:52,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:02:52,498 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:52,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1159961799, now seen corresponding path program 6 times [2024-06-21 20:02:52,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:52,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259530970] [2024-06-21 20:02:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:52,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:52,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:52,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259530970] [2024-06-21 20:02:52,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259530970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:52,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:52,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221448858] [2024-06-21 20:02:52,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:52,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:52,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:52,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:52,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:52,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:52,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 140 transitions, 1484 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:52,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:52,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:52,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:52,951 INFO L124 PetriNetUnfolderBase]: 1429/2408 cut-off events. [2024-06-21 20:02:52,952 INFO L125 PetriNetUnfolderBase]: For 44482/44493 co-relation queries the response was YES. [2024-06-21 20:02:52,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12952 conditions, 2408 events. 1429/2408 cut-off events. For 44482/44493 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13681 event pairs, 273 based on Foata normal form. 20/2420 useless extension candidates. Maximal degree in co-relation 12892. Up to 1666 conditions per place. [2024-06-21 20:02:52,969 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 126 selfloop transitions, 36 changer transitions 0/169 dead transitions. [2024-06-21 20:02:52,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 169 transitions, 1900 flow [2024-06-21 20:02:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:02:52,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:02:52,971 INFO L175 Difference]: Start difference. First operand has 124 places, 140 transitions, 1484 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:02:52,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 169 transitions, 1900 flow [2024-06-21 20:02:53,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 169 transitions, 1815 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:53,104 INFO L231 Difference]: Finished difference. Result has 124 places, 140 transitions, 1478 flow [2024-06-21 20:02:53,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1478, PETRI_PLACES=124, PETRI_TRANSITIONS=140} [2024-06-21 20:02:53,105 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-21 20:02:53,105 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 140 transitions, 1478 flow [2024-06-21 20:02:53,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:53,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:53,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:53,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:02:53,108 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:53,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:53,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1165687251, now seen corresponding path program 1 times [2024-06-21 20:02:53,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:53,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036220831] [2024-06-21 20:02:53,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:53,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:53,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:53,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036220831] [2024-06-21 20:02:53,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036220831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:53,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:53,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:53,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797529101] [2024-06-21 20:02:53,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:53,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:53,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:53,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:53,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:53,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:53,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 140 transitions, 1478 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:53,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:53,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:53,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:53,660 INFO L124 PetriNetUnfolderBase]: 1470/2491 cut-off events. [2024-06-21 20:02:53,660 INFO L125 PetriNetUnfolderBase]: For 47075/47089 co-relation queries the response was YES. [2024-06-21 20:02:53,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13298 conditions, 2491 events. 1470/2491 cut-off events. For 47075/47089 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14304 event pairs, 331 based on Foata normal form. 22/2506 useless extension candidates. Maximal degree in co-relation 13237. Up to 1869 conditions per place. [2024-06-21 20:02:53,680 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 132 selfloop transitions, 39 changer transitions 0/178 dead transitions. [2024-06-21 20:02:53,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 178 transitions, 1950 flow [2024-06-21 20:02:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:53,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:02:53,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:02:53,682 INFO L175 Difference]: Start difference. First operand has 124 places, 140 transitions, 1478 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:02:53,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 178 transitions, 1950 flow [2024-06-21 20:02:53,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 178 transitions, 1821 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:53,770 INFO L231 Difference]: Finished difference. Result has 126 places, 141 transitions, 1455 flow [2024-06-21 20:02:53,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1455, PETRI_PLACES=126, PETRI_TRANSITIONS=141} [2024-06-21 20:02:53,774 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-21 20:02:53,774 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 141 transitions, 1455 flow [2024-06-21 20:02:53,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:53,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:53,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:53,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:02:53,775 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:53,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:53,775 INFO L85 PathProgramCache]: Analyzing trace with hash -73877765, now seen corresponding path program 1 times [2024-06-21 20:02:53,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:53,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703319949] [2024-06-21 20:02:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:53,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:53,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:53,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703319949] [2024-06-21 20:02:53,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703319949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:53,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:53,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179133673] [2024-06-21 20:02:53,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:53,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:53,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 141 transitions, 1455 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:53,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:53,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:53,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:54,160 INFO L124 PetriNetUnfolderBase]: 1441/2451 cut-off events. [2024-06-21 20:02:54,160 INFO L125 PetriNetUnfolderBase]: For 46879/46879 co-relation queries the response was YES. [2024-06-21 20:02:54,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13112 conditions, 2451 events. 1441/2451 cut-off events. For 46879/46879 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14173 event pairs, 362 based on Foata normal form. 3/2433 useless extension candidates. Maximal degree in co-relation 13051. Up to 2035 conditions per place. [2024-06-21 20:02:54,175 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 98 selfloop transitions, 57 changer transitions 0/171 dead transitions. [2024-06-21 20:02:54,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 171 transitions, 2041 flow [2024-06-21 20:02:54,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:02:54,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-21 20:02:54,177 INFO L175 Difference]: Start difference. First operand has 126 places, 141 transitions, 1455 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:02:54,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 171 transitions, 2041 flow [2024-06-21 20:02:54,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1951 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:54,243 INFO L231 Difference]: Finished difference. Result has 127 places, 153 transitions, 1656 flow [2024-06-21 20:02:54,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1656, PETRI_PLACES=127, PETRI_TRANSITIONS=153} [2024-06-21 20:02:54,244 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-21 20:02:54,244 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 153 transitions, 1656 flow [2024-06-21 20:02:54,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:54,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:54,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:54,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:02:54,244 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:54,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:54,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1600963011, now seen corresponding path program 2 times [2024-06-21 20:02:54,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:54,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882031664] [2024-06-21 20:02:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:54,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:54,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:54,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882031664] [2024-06-21 20:02:54,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882031664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:54,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:54,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:54,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417428422] [2024-06-21 20:02:54,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:54,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:54,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:54,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:54,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:54,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:54,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 153 transitions, 1656 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:54,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:54,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:54,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:54,620 INFO L124 PetriNetUnfolderBase]: 1498/2532 cut-off events. [2024-06-21 20:02:54,621 INFO L125 PetriNetUnfolderBase]: For 49498/49498 co-relation queries the response was YES. [2024-06-21 20:02:54,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13905 conditions, 2532 events. 1498/2532 cut-off events. For 49498/49498 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14537 event pairs, 352 based on Foata normal form. 1/2531 useless extension candidates. Maximal degree in co-relation 13842. Up to 2287 conditions per place. [2024-06-21 20:02:54,636 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 142 selfloop transitions, 25 changer transitions 0/174 dead transitions. [2024-06-21 20:02:54,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 174 transitions, 2113 flow [2024-06-21 20:02:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:54,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 20:02:54,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:02:54,638 INFO L175 Difference]: Start difference. First operand has 127 places, 153 transitions, 1656 flow. Second operand 6 states and 141 transitions. [2024-06-21 20:02:54,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 174 transitions, 2113 flow [2024-06-21 20:02:54,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 174 transitions, 2058 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:54,712 INFO L231 Difference]: Finished difference. Result has 132 places, 157 transitions, 1684 flow [2024-06-21 20:02:54,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1684, PETRI_PLACES=132, PETRI_TRANSITIONS=157} [2024-06-21 20:02:54,713 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-21 20:02:54,713 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 157 transitions, 1684 flow [2024-06-21 20:02:54,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:54,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:54,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:54,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:02:54,713 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:54,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:54,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1955617545, now seen corresponding path program 2 times [2024-06-21 20:02:54,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:54,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391977705] [2024-06-21 20:02:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:54,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:54,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:54,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391977705] [2024-06-21 20:02:54,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391977705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:54,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:54,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:54,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566098517] [2024-06-21 20:02:54,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:54,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:54,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:54,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:54,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:54,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:54,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 157 transitions, 1684 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:54,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:54,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:54,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:55,235 INFO L124 PetriNetUnfolderBase]: 1539/2610 cut-off events. [2024-06-21 20:02:55,235 INFO L125 PetriNetUnfolderBase]: For 55704/55704 co-relation queries the response was YES. [2024-06-21 20:02:55,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14026 conditions, 2610 events. 1539/2610 cut-off events. For 55704/55704 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15181 event pairs, 268 based on Foata normal form. 12/2615 useless extension candidates. Maximal degree in co-relation 13960. Up to 2023 conditions per place. [2024-06-21 20:02:55,254 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 148 selfloop transitions, 43 changer transitions 0/198 dead transitions. [2024-06-21 20:02:55,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 198 transitions, 2206 flow [2024-06-21 20:02:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:02:55,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-21 20:02:55,256 INFO L175 Difference]: Start difference. First operand has 132 places, 157 transitions, 1684 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:02:55,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 198 transitions, 2206 flow [2024-06-21 20:02:55,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 198 transitions, 2170 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:55,359 INFO L231 Difference]: Finished difference. Result has 138 places, 158 transitions, 1764 flow [2024-06-21 20:02:55,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1764, PETRI_PLACES=138, PETRI_TRANSITIONS=158} [2024-06-21 20:02:55,359 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-21 20:02:55,359 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 158 transitions, 1764 flow [2024-06-21 20:02:55,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:55,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:55,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:55,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:02:55,360 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:55,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:55,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1985079861, now seen corresponding path program 3 times [2024-06-21 20:02:55,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:55,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800272765] [2024-06-21 20:02:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:55,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:55,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:55,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800272765] [2024-06-21 20:02:55,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800272765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:55,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:55,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:55,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067874308] [2024-06-21 20:02:55,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:55,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:55,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:55,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:55,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:55,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:55,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 158 transitions, 1764 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:55,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:55,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:55,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:55,882 INFO L124 PetriNetUnfolderBase]: 1519/2585 cut-off events. [2024-06-21 20:02:55,883 INFO L125 PetriNetUnfolderBase]: For 56603/56614 co-relation queries the response was YES. [2024-06-21 20:02:55,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13896 conditions, 2585 events. 1519/2585 cut-off events. For 56603/56614 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15069 event pairs, 259 based on Foata normal form. 20/2597 useless extension candidates. Maximal degree in co-relation 13829. Up to 1531 conditions per place. [2024-06-21 20:02:55,901 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 142 selfloop transitions, 42 changer transitions 0/191 dead transitions. [2024-06-21 20:02:55,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 191 transitions, 2184 flow [2024-06-21 20:02:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:02:55,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:02:55,903 INFO L175 Difference]: Start difference. First operand has 138 places, 158 transitions, 1764 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:02:55,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 191 transitions, 2184 flow [2024-06-21 20:02:55,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 191 transitions, 2078 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:55,983 INFO L231 Difference]: Finished difference. Result has 138 places, 157 transitions, 1696 flow [2024-06-21 20:02:55,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1696, PETRI_PLACES=138, PETRI_TRANSITIONS=157} [2024-06-21 20:02:55,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-21 20:02:55,984 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 157 transitions, 1696 flow [2024-06-21 20:02:55,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:55,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:55,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:55,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:02:55,985 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:55,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:55,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1246699971, now seen corresponding path program 3 times [2024-06-21 20:02:55,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:55,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305776822] [2024-06-21 20:02:55,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:55,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:56,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:56,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305776822] [2024-06-21 20:02:56,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305776822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:56,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:56,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:56,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840396974] [2024-06-21 20:02:56,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:56,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:56,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:56,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:56,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:56,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 157 transitions, 1696 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:56,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:56,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:56,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:56,410 INFO L124 PetriNetUnfolderBase]: 1521/2586 cut-off events. [2024-06-21 20:02:56,410 INFO L125 PetriNetUnfolderBase]: For 51053/51053 co-relation queries the response was YES. [2024-06-21 20:02:56,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13786 conditions, 2586 events. 1521/2586 cut-off events. For 51053/51053 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15058 event pairs, 354 based on Foata normal form. 2/2586 useless extension candidates. Maximal degree in co-relation 13718. Up to 2330 conditions per place. [2024-06-21 20:02:56,428 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 154 selfloop transitions, 26 changer transitions 0/187 dead transitions. [2024-06-21 20:02:56,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 187 transitions, 2179 flow [2024-06-21 20:02:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 20:02:56,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-21 20:02:56,430 INFO L175 Difference]: Start difference. First operand has 138 places, 157 transitions, 1696 flow. Second operand 5 states and 129 transitions. [2024-06-21 20:02:56,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 187 transitions, 2179 flow [2024-06-21 20:02:56,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 187 transitions, 2034 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:02:56,529 INFO L231 Difference]: Finished difference. Result has 138 places, 166 transitions, 1720 flow [2024-06-21 20:02:56,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1720, PETRI_PLACES=138, PETRI_TRANSITIONS=166} [2024-06-21 20:02:56,529 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-21 20:02:56,529 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 166 transitions, 1720 flow [2024-06-21 20:02:56,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:56,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:56,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:56,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:02:56,530 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:56,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:56,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1105900367, now seen corresponding path program 2 times [2024-06-21 20:02:56,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:56,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176028692] [2024-06-21 20:02:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:56,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:56,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:56,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176028692] [2024-06-21 20:02:56,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176028692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:56,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:56,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:56,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494733487] [2024-06-21 20:02:56,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:56,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:56,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:56,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:56,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:56,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 166 transitions, 1720 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:56,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:56,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:56,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:56,920 INFO L124 PetriNetUnfolderBase]: 1498/2566 cut-off events. [2024-06-21 20:02:56,920 INFO L125 PetriNetUnfolderBase]: For 54081/54081 co-relation queries the response was YES. [2024-06-21 20:02:56,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13664 conditions, 2566 events. 1498/2566 cut-off events. For 54081/54081 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15079 event pairs, 353 based on Foata normal form. 3/2552 useless extension candidates. Maximal degree in co-relation 13595. Up to 2165 conditions per place. [2024-06-21 20:02:56,938 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 123 selfloop transitions, 54 changer transitions 0/198 dead transitions. [2024-06-21 20:02:56,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 198 transitions, 2379 flow [2024-06-21 20:02:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:02:56,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-21 20:02:56,940 INFO L175 Difference]: Start difference. First operand has 138 places, 166 transitions, 1720 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:02:56,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 198 transitions, 2379 flow [2024-06-21 20:02:57,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 2369 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:57,057 INFO L231 Difference]: Finished difference. Result has 145 places, 176 transitions, 1986 flow [2024-06-21 20:02:57,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1986, PETRI_PLACES=145, PETRI_TRANSITIONS=176} [2024-06-21 20:02:57,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-21 20:02:57,058 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 176 transitions, 1986 flow [2024-06-21 20:02:57,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:57,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:57,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:57,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:02:57,059 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:57,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:57,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1369809045, now seen corresponding path program 1 times [2024-06-21 20:02:57,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:57,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253217529] [2024-06-21 20:02:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:57,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:57,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:57,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253217529] [2024-06-21 20:02:57,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253217529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:57,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:57,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:57,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928852673] [2024-06-21 20:02:57,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:57,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:57,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:57,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:57,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:57,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:57,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 176 transitions, 1986 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:57,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:57,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:57,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:57,512 INFO L124 PetriNetUnfolderBase]: 1548/2641 cut-off events. [2024-06-21 20:02:57,512 INFO L125 PetriNetUnfolderBase]: For 58603/58617 co-relation queries the response was YES. [2024-06-21 20:02:57,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14395 conditions, 2641 events. 1548/2641 cut-off events. For 58603/58617 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 15576 event pairs, 381 based on Foata normal form. 12/2646 useless extension candidates. Maximal degree in co-relation 14322. Up to 2287 conditions per place. [2024-06-21 20:02:57,528 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 147 selfloop transitions, 41 changer transitions 0/195 dead transitions. [2024-06-21 20:02:57,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 195 transitions, 2577 flow [2024-06-21 20:02:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 20:02:57,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-21 20:02:57,530 INFO L175 Difference]: Start difference. First operand has 145 places, 176 transitions, 1986 flow. Second operand 5 states and 123 transitions. [2024-06-21 20:02:57,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 195 transitions, 2577 flow [2024-06-21 20:02:57,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 195 transitions, 2531 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:57,670 INFO L231 Difference]: Finished difference. Result has 150 places, 181 transitions, 2117 flow [2024-06-21 20:02:57,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2117, PETRI_PLACES=150, PETRI_TRANSITIONS=181} [2024-06-21 20:02:57,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-21 20:02:57,671 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 181 transitions, 2117 flow [2024-06-21 20:02:57,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:57,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:57,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:57,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:02:57,672 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:57,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:57,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1390254165, now seen corresponding path program 2 times [2024-06-21 20:02:57,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:57,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386232636] [2024-06-21 20:02:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:57,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:57,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:57,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386232636] [2024-06-21 20:02:57,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386232636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:57,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:57,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:57,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293527232] [2024-06-21 20:02:57,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:57,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:57,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:57,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:57,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:57,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:57,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 181 transitions, 2117 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:57,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:57,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:57,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:58,091 INFO L124 PetriNetUnfolderBase]: 1530/2608 cut-off events. [2024-06-21 20:02:58,091 INFO L125 PetriNetUnfolderBase]: For 59088/59091 co-relation queries the response was YES. [2024-06-21 20:02:58,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14336 conditions, 2608 events. 1530/2608 cut-off events. For 59088/59091 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15260 event pairs, 358 based on Foata normal form. 6/2611 useless extension candidates. Maximal degree in co-relation 14260. Up to 2267 conditions per place. [2024-06-21 20:02:58,110 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 147 selfloop transitions, 45 changer transitions 0/199 dead transitions. [2024-06-21 20:02:58,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 199 transitions, 2547 flow [2024-06-21 20:02:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 20:02:58,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:02:58,112 INFO L175 Difference]: Start difference. First operand has 150 places, 181 transitions, 2117 flow. Second operand 5 states and 130 transitions. [2024-06-21 20:02:58,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 199 transitions, 2547 flow [2024-06-21 20:02:58,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 199 transitions, 2468 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:58,234 INFO L231 Difference]: Finished difference. Result has 154 places, 181 transitions, 2149 flow [2024-06-21 20:02:58,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2149, PETRI_PLACES=154, PETRI_TRANSITIONS=181} [2024-06-21 20:02:58,237 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-21 20:02:58,237 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 181 transitions, 2149 flow [2024-06-21 20:02:58,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:58,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:58,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:58,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:02:58,238 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:58,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:58,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1106330957, now seen corresponding path program 1 times [2024-06-21 20:02:58,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:58,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037690888] [2024-06-21 20:02:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:58,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:58,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:58,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037690888] [2024-06-21 20:02:58,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037690888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:58,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:58,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:58,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129318755] [2024-06-21 20:02:58,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:58,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:58,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:58,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:58,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:58,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:02:58,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 181 transitions, 2149 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:58,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:58,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:02:58,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:58,625 INFO L124 PetriNetUnfolderBase]: 1472/2516 cut-off events. [2024-06-21 20:02:58,625 INFO L125 PetriNetUnfolderBase]: For 60788/60788 co-relation queries the response was YES. [2024-06-21 20:02:58,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13964 conditions, 2516 events. 1472/2516 cut-off events. For 60788/60788 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14726 event pairs, 347 based on Foata normal form. 4/2503 useless extension candidates. Maximal degree in co-relation 13886. Up to 2238 conditions per place. [2024-06-21 20:02:58,643 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 157 selfloop transitions, 14 changer transitions 0/192 dead transitions. [2024-06-21 20:02:58,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 192 transitions, 2535 flow [2024-06-21 20:02:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-21 20:02:58,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:02:58,644 INFO L175 Difference]: Start difference. First operand has 154 places, 181 transitions, 2149 flow. Second operand 4 states and 98 transitions. [2024-06-21 20:02:58,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 192 transitions, 2535 flow [2024-06-21 20:02:58,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 192 transitions, 2436 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:58,810 INFO L231 Difference]: Finished difference. Result has 153 places, 183 transitions, 2110 flow [2024-06-21 20:02:58,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2110, PETRI_PLACES=153, PETRI_TRANSITIONS=183} [2024-06-21 20:02:58,811 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-21 20:02:58,811 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 183 transitions, 2110 flow [2024-06-21 20:02:58,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:58,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:58,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:58,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:02:58,812 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:58,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:58,812 INFO L85 PathProgramCache]: Analyzing trace with hash -970338903, now seen corresponding path program 1 times [2024-06-21 20:02:58,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:58,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616520385] [2024-06-21 20:02:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:58,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:58,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:58,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616520385] [2024-06-21 20:02:58,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616520385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:58,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:58,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:58,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889190536] [2024-06-21 20:02:58,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:58,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:58,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:58,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:58,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:58,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:58,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 183 transitions, 2110 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:58,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:58,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:58,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:59,219 INFO L124 PetriNetUnfolderBase]: 1525/2586 cut-off events. [2024-06-21 20:02:59,220 INFO L125 PetriNetUnfolderBase]: For 58728/58728 co-relation queries the response was YES. [2024-06-21 20:02:59,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14242 conditions, 2586 events. 1525/2586 cut-off events. For 58728/58728 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15027 event pairs, 349 based on Foata normal form. 1/2585 useless extension candidates. Maximal degree in co-relation 14164. Up to 2308 conditions per place. [2024-06-21 20:02:59,239 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 170 selfloop transitions, 41 changer transitions 0/218 dead transitions. [2024-06-21 20:02:59,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 218 transitions, 2742 flow [2024-06-21 20:02:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:02:59,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:02:59,240 INFO L175 Difference]: Start difference. First operand has 153 places, 183 transitions, 2110 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:02:59,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 218 transitions, 2742 flow [2024-06-21 20:02:59,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 218 transitions, 2700 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:59,355 INFO L231 Difference]: Finished difference. Result has 159 places, 194 transitions, 2271 flow [2024-06-21 20:02:59,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2271, PETRI_PLACES=159, PETRI_TRANSITIONS=194} [2024-06-21 20:02:59,355 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-21 20:02:59,355 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 194 transitions, 2271 flow [2024-06-21 20:02:59,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:59,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:59,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:59,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:02:59,356 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:59,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:59,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1909755299, now seen corresponding path program 2 times [2024-06-21 20:02:59,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:59,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109075975] [2024-06-21 20:02:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:59,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:59,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109075975] [2024-06-21 20:02:59,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109075975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:59,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:59,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:59,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253697097] [2024-06-21 20:02:59,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:59,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:59,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:59,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:59,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:59,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:02:59,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 194 transitions, 2271 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:59,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:59,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:02:59,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:59,780 INFO L124 PetriNetUnfolderBase]: 1538/2608 cut-off events. [2024-06-21 20:02:59,780 INFO L125 PetriNetUnfolderBase]: For 63327/63327 co-relation queries the response was YES. [2024-06-21 20:02:59,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14775 conditions, 2608 events. 1538/2608 cut-off events. For 63327/63327 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15150 event pairs, 349 based on Foata normal form. 1/2607 useless extension candidates. Maximal degree in co-relation 14695. Up to 2323 conditions per place. [2024-06-21 20:02:59,801 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 168 selfloop transitions, 45 changer transitions 0/220 dead transitions. [2024-06-21 20:02:59,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 220 transitions, 2954 flow [2024-06-21 20:02:59,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:59,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:02:59,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-21 20:02:59,803 INFO L175 Difference]: Start difference. First operand has 159 places, 194 transitions, 2271 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:02:59,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 220 transitions, 2954 flow [2024-06-21 20:02:59,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 220 transitions, 2910 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:59,921 INFO L231 Difference]: Finished difference. Result has 164 places, 201 transitions, 2398 flow [2024-06-21 20:02:59,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2398, PETRI_PLACES=164, PETRI_TRANSITIONS=201} [2024-06-21 20:02:59,921 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-21 20:02:59,921 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 201 transitions, 2398 flow [2024-06-21 20:02:59,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:59,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:59,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:59,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:02:59,922 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:02:59,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:59,923 INFO L85 PathProgramCache]: Analyzing trace with hash -961073313, now seen corresponding path program 3 times [2024-06-21 20:02:59,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:59,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759875148] [2024-06-21 20:02:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:59,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:00,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:00,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759875148] [2024-06-21 20:03:00,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759875148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:00,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:00,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:00,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896276091] [2024-06-21 20:03:00,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:00,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:00,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:00,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:00,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:00,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:00,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 201 transitions, 2398 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:00,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:00,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:00,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:00,353 INFO L124 PetriNetUnfolderBase]: 1535/2604 cut-off events. [2024-06-21 20:03:00,353 INFO L125 PetriNetUnfolderBase]: For 66011/66011 co-relation queries the response was YES. [2024-06-21 20:03:00,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14858 conditions, 2604 events. 1535/2604 cut-off events. For 66011/66011 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15143 event pairs, 349 based on Foata normal form. 1/2603 useless extension candidates. Maximal degree in co-relation 14776. Up to 2320 conditions per place. [2024-06-21 20:03:00,372 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 166 selfloop transitions, 46 changer transitions 0/219 dead transitions. [2024-06-21 20:03:00,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 219 transitions, 2936 flow [2024-06-21 20:03:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 20:03:00,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:03:00,374 INFO L175 Difference]: Start difference. First operand has 164 places, 201 transitions, 2398 flow. Second operand 7 states and 161 transitions. [2024-06-21 20:03:00,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 219 transitions, 2936 flow [2024-06-21 20:03:00,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 219 transitions, 2857 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:00,491 INFO L231 Difference]: Finished difference. Result has 169 places, 201 transitions, 2417 flow [2024-06-21 20:03:00,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2417, PETRI_PLACES=169, PETRI_TRANSITIONS=201} [2024-06-21 20:03:00,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-21 20:03:00,492 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 201 transitions, 2417 flow [2024-06-21 20:03:00,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:00,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:00,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:00,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:03:00,493 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:00,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:00,493 INFO L85 PathProgramCache]: Analyzing trace with hash 200218865, now seen corresponding path program 4 times [2024-06-21 20:03:00,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:00,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379403095] [2024-06-21 20:03:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:00,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:00,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379403095] [2024-06-21 20:03:00,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379403095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:00,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:00,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:00,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300157499] [2024-06-21 20:03:00,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:00,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:00,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:00,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:00,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:00,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:00,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 201 transitions, 2417 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:00,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:00,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:00,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:00,955 INFO L124 PetriNetUnfolderBase]: 1540/2613 cut-off events. [2024-06-21 20:03:00,955 INFO L125 PetriNetUnfolderBase]: For 69524/69524 co-relation queries the response was YES. [2024-06-21 20:03:00,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14992 conditions, 2613 events. 1540/2613 cut-off events. For 69524/69524 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15208 event pairs, 349 based on Foata normal form. 1/2612 useless extension candidates. Maximal degree in co-relation 14909. Up to 2347 conditions per place. [2024-06-21 20:03:00,976 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 186 selfloop transitions, 34 changer transitions 0/227 dead transitions. [2024-06-21 20:03:00,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 227 transitions, 3026 flow [2024-06-21 20:03:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:03:00,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 20:03:00,978 INFO L175 Difference]: Start difference. First operand has 169 places, 201 transitions, 2417 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:03:00,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 227 transitions, 3026 flow [2024-06-21 20:03:01,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 227 transitions, 2930 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:01,149 INFO L231 Difference]: Finished difference. Result has 170 places, 204 transitions, 2434 flow [2024-06-21 20:03:01,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2434, PETRI_PLACES=170, PETRI_TRANSITIONS=204} [2024-06-21 20:03:01,150 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-21 20:03:01,150 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 204 transitions, 2434 flow [2024-06-21 20:03:01,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:01,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:01,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:01,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:03:01,151 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:01,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash -76826275, now seen corresponding path program 5 times [2024-06-21 20:03:01,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:01,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16517814] [2024-06-21 20:03:01,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:01,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:01,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:01,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16517814] [2024-06-21 20:03:01,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16517814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:01,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:01,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:01,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499300596] [2024-06-21 20:03:01,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:01,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:01,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:01,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:01,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:01,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:01,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 204 transitions, 2434 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:01,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:01,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:01,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:01,579 INFO L124 PetriNetUnfolderBase]: 1537/2609 cut-off events. [2024-06-21 20:03:01,579 INFO L125 PetriNetUnfolderBase]: For 72040/72040 co-relation queries the response was YES. [2024-06-21 20:03:01,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15004 conditions, 2609 events. 1537/2609 cut-off events. For 72040/72040 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15209 event pairs, 349 based on Foata normal form. 1/2608 useless extension candidates. Maximal degree in co-relation 14920. Up to 2344 conditions per place. [2024-06-21 20:03:01,597 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 181 selfloop transitions, 32 changer transitions 0/220 dead transitions. [2024-06-21 20:03:01,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 220 transitions, 2900 flow [2024-06-21 20:03:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:01,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 20:03:01,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:03:01,598 INFO L175 Difference]: Start difference. First operand has 170 places, 204 transitions, 2434 flow. Second operand 6 states and 141 transitions. [2024-06-21 20:03:01,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 220 transitions, 2900 flow [2024-06-21 20:03:01,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 220 transitions, 2792 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:01,721 INFO L231 Difference]: Finished difference. Result has 172 places, 204 transitions, 2396 flow [2024-06-21 20:03:01,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2396, PETRI_PLACES=172, PETRI_TRANSITIONS=204} [2024-06-21 20:03:01,721 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-21 20:03:01,722 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 204 transitions, 2396 flow [2024-06-21 20:03:01,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:01,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:01,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:01,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:03:01,722 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:01,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1187095605, now seen corresponding path program 1 times [2024-06-21 20:03:01,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:01,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239917078] [2024-06-21 20:03:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:01,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:01,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:01,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239917078] [2024-06-21 20:03:01,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239917078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:01,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:01,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:01,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10043431] [2024-06-21 20:03:01,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:01,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:01,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:01,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:01,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:01,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:01,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 204 transitions, 2396 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:01,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:01,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:01,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:02,124 INFO L124 PetriNetUnfolderBase]: 1539/2620 cut-off events. [2024-06-21 20:03:02,124 INFO L125 PetriNetUnfolderBase]: For 77353/77367 co-relation queries the response was YES. [2024-06-21 20:03:02,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15066 conditions, 2620 events. 1539/2620 cut-off events. For 77353/77367 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15340 event pairs, 390 based on Foata normal form. 12/2625 useless extension candidates. Maximal degree in co-relation 14981. Up to 2196 conditions per place. [2024-06-21 20:03:02,144 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 141 selfloop transitions, 74 changer transitions 0/222 dead transitions. [2024-06-21 20:03:02,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 222 transitions, 3059 flow [2024-06-21 20:03:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 20:03:02,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:03:02,146 INFO L175 Difference]: Start difference. First operand has 172 places, 204 transitions, 2396 flow. Second operand 6 states and 144 transitions. [2024-06-21 20:03:02,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 222 transitions, 3059 flow [2024-06-21 20:03:02,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 222 transitions, 2953 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:02,308 INFO L231 Difference]: Finished difference. Result has 173 places, 207 transitions, 2490 flow [2024-06-21 20:03:02,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2490, PETRI_PLACES=173, PETRI_TRANSITIONS=207} [2024-06-21 20:03:02,308 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-21 20:03:02,308 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 207 transitions, 2490 flow [2024-06-21 20:03:02,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:02,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:02,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:02,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:03:02,309 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:02,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:02,309 INFO L85 PathProgramCache]: Analyzing trace with hash 148207243, now seen corresponding path program 2 times [2024-06-21 20:03:02,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:02,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584073178] [2024-06-21 20:03:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:02,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:02,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:02,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584073178] [2024-06-21 20:03:02,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584073178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:02,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:02,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:02,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534829701] [2024-06-21 20:03:02,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:02,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:02,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:02,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:02,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:02,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:02,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 207 transitions, 2490 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:02,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:02,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:02,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:02,816 INFO L124 PetriNetUnfolderBase]: 1541/2620 cut-off events. [2024-06-21 20:03:02,816 INFO L125 PetriNetUnfolderBase]: For 78579/78582 co-relation queries the response was YES. [2024-06-21 20:03:02,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15242 conditions, 2620 events. 1541/2620 cut-off events. For 78579/78582 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15302 event pairs, 353 based on Foata normal form. 4/2621 useless extension candidates. Maximal degree in co-relation 15157. Up to 2258 conditions per place. [2024-06-21 20:03:02,838 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 165 selfloop transitions, 59 changer transitions 0/231 dead transitions. [2024-06-21 20:03:02,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 231 transitions, 3200 flow [2024-06-21 20:03:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:03:02,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 20:03:02,839 INFO L175 Difference]: Start difference. First operand has 173 places, 207 transitions, 2490 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:03:02,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 231 transitions, 3200 flow [2024-06-21 20:03:03,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 231 transitions, 2999 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:03,039 INFO L231 Difference]: Finished difference. Result has 175 places, 210 transitions, 2468 flow [2024-06-21 20:03:03,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2468, PETRI_PLACES=175, PETRI_TRANSITIONS=210} [2024-06-21 20:03:03,040 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-21 20:03:03,040 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 210 transitions, 2468 flow [2024-06-21 20:03:03,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:03,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:03,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:03,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:03:03,041 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:03,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash -21455658, now seen corresponding path program 1 times [2024-06-21 20:03:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:03,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715691981] [2024-06-21 20:03:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:03,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:03,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:03,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715691981] [2024-06-21 20:03:03,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715691981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:03,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:03,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:03,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880286023] [2024-06-21 20:03:03,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:03,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:03,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:03,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:03,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 210 transitions, 2468 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:03,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:03,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:03,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:03,534 INFO L124 PetriNetUnfolderBase]: 1562/2636 cut-off events. [2024-06-21 20:03:03,534 INFO L125 PetriNetUnfolderBase]: For 82843/82843 co-relation queries the response was YES. [2024-06-21 20:03:03,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15480 conditions, 2636 events. 1562/2636 cut-off events. For 82843/82843 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 15291 event pairs, 373 based on Foata normal form. 1/2626 useless extension candidates. Maximal degree in co-relation 15395. Up to 2163 conditions per place. [2024-06-21 20:03:03,556 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 170 selfloop transitions, 76 changer transitions 0/253 dead transitions. [2024-06-21 20:03:03,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 253 transitions, 3494 flow [2024-06-21 20:03:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:03:03,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-21 20:03:03,558 INFO L175 Difference]: Start difference. First operand has 175 places, 210 transitions, 2468 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:03:03,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 253 transitions, 3494 flow [2024-06-21 20:03:03,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 253 transitions, 3346 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:03,745 INFO L231 Difference]: Finished difference. Result has 178 places, 223 transitions, 2626 flow [2024-06-21 20:03:03,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2626, PETRI_PLACES=178, PETRI_TRANSITIONS=223} [2024-06-21 20:03:03,745 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-21 20:03:03,745 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 223 transitions, 2626 flow [2024-06-21 20:03:03,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:03,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:03,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:03,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:03:03,746 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:03,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:03,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1214022022, now seen corresponding path program 2 times [2024-06-21 20:03:03,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:03,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12525756] [2024-06-21 20:03:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:03,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:03,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:03,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12525756] [2024-06-21 20:03:03,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12525756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:03,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:03,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:03,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953524279] [2024-06-21 20:03:03,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:03,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:03,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:03,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:03,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:03,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:03,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 223 transitions, 2626 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:03,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:03,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:03,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:04,199 INFO L124 PetriNetUnfolderBase]: 1583/2669 cut-off events. [2024-06-21 20:03:04,200 INFO L125 PetriNetUnfolderBase]: For 89734/89734 co-relation queries the response was YES. [2024-06-21 20:03:04,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16214 conditions, 2669 events. 1583/2669 cut-off events. For 89734/89734 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15511 event pairs, 373 based on Foata normal form. 1/2659 useless extension candidates. Maximal degree in co-relation 16128. Up to 2182 conditions per place. [2024-06-21 20:03:04,222 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 167 selfloop transitions, 83 changer transitions 0/257 dead transitions. [2024-06-21 20:03:04,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 257 transitions, 3612 flow [2024-06-21 20:03:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:03:04,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:03:04,226 INFO L175 Difference]: Start difference. First operand has 178 places, 223 transitions, 2626 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:03:04,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 257 transitions, 3612 flow [2024-06-21 20:03:04,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 257 transitions, 3508 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:04,425 INFO L231 Difference]: Finished difference. Result has 184 places, 230 transitions, 2786 flow [2024-06-21 20:03:04,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2786, PETRI_PLACES=184, PETRI_TRANSITIONS=230} [2024-06-21 20:03:04,425 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-21 20:03:04,425 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 230 transitions, 2786 flow [2024-06-21 20:03:04,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:04,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:04,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:04,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:03:04,426 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:04,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:04,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1222595878, now seen corresponding path program 1 times [2024-06-21 20:03:04,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:04,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74294348] [2024-06-21 20:03:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:04,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:04,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:04,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74294348] [2024-06-21 20:03:04,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74294348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:04,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:04,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:04,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709360290] [2024-06-21 20:03:04,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:04,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:04,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:04,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:04,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:04,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:04,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 230 transitions, 2786 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:04,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:04,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:04,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:04,987 INFO L124 PetriNetUnfolderBase]: 1591/2693 cut-off events. [2024-06-21 20:03:04,988 INFO L125 PetriNetUnfolderBase]: For 94633/94633 co-relation queries the response was YES. [2024-06-21 20:03:05,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16558 conditions, 2693 events. 1591/2693 cut-off events. For 94633/94633 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15741 event pairs, 264 based on Foata normal form. 2/2693 useless extension candidates. Maximal degree in co-relation 16469. Up to 2378 conditions per place. [2024-06-21 20:03:05,009 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 225 selfloop transitions, 31 changer transitions 0/263 dead transitions. [2024-06-21 20:03:05,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 263 transitions, 3486 flow [2024-06-21 20:03:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:03:05,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-21 20:03:05,010 INFO L175 Difference]: Start difference. First operand has 184 places, 230 transitions, 2786 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:03:05,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 263 transitions, 3486 flow [2024-06-21 20:03:05,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 263 transitions, 3345 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:05,247 INFO L231 Difference]: Finished difference. Result has 188 places, 234 transitions, 2748 flow [2024-06-21 20:03:05,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2748, PETRI_PLACES=188, PETRI_TRANSITIONS=234} [2024-06-21 20:03:05,247 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-21 20:03:05,248 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 234 transitions, 2748 flow [2024-06-21 20:03:05,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:05,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:05,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:05,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:03:05,248 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:05,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash 798047568, now seen corresponding path program 2 times [2024-06-21 20:03:05,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:05,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985491347] [2024-06-21 20:03:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:05,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:05,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:05,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985491347] [2024-06-21 20:03:05,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985491347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:05,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:05,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:05,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449068681] [2024-06-21 20:03:05,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:05,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:05,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:05,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:05,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:05,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:05,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 234 transitions, 2748 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:05,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:05,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:05,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:05,717 INFO L124 PetriNetUnfolderBase]: 1599/2703 cut-off events. [2024-06-21 20:03:05,717 INFO L125 PetriNetUnfolderBase]: For 98507/98507 co-relation queries the response was YES. [2024-06-21 20:03:05,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16608 conditions, 2703 events. 1599/2703 cut-off events. For 98507/98507 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 15771 event pairs, 342 based on Foata normal form. 2/2703 useless extension candidates. Maximal degree in co-relation 16518. Up to 2435 conditions per place. [2024-06-21 20:03:05,738 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 225 selfloop transitions, 28 changer transitions 0/260 dead transitions. [2024-06-21 20:03:05,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 260 transitions, 3334 flow [2024-06-21 20:03:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:05,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:05,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 20:03:05,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-21 20:03:05,739 INFO L175 Difference]: Start difference. First operand has 188 places, 234 transitions, 2748 flow. Second operand 7 states and 162 transitions. [2024-06-21 20:03:05,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 260 transitions, 3334 flow [2024-06-21 20:03:05,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 260 transitions, 3272 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:05,963 INFO L231 Difference]: Finished difference. Result has 192 places, 236 transitions, 2771 flow [2024-06-21 20:03:05,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2771, PETRI_PLACES=192, PETRI_TRANSITIONS=236} [2024-06-21 20:03:05,963 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-21 20:03:05,964 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 236 transitions, 2771 flow [2024-06-21 20:03:05,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:05,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:05,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:05,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:03:05,964 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:05,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:05,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1104444772, now seen corresponding path program 3 times [2024-06-21 20:03:05,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:05,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406653140] [2024-06-21 20:03:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:05,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:06,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:06,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406653140] [2024-06-21 20:03:06,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406653140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:06,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:06,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:06,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989690592] [2024-06-21 20:03:06,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:06,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:06,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:06,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:06,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:06,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:06,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 236 transitions, 2771 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:06,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:06,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:06,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:06,431 INFO L124 PetriNetUnfolderBase]: 1622/2734 cut-off events. [2024-06-21 20:03:06,431 INFO L125 PetriNetUnfolderBase]: For 103266/103266 co-relation queries the response was YES. [2024-06-21 20:03:06,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16974 conditions, 2734 events. 1622/2734 cut-off events. For 103266/103266 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 15966 event pairs, 359 based on Foata normal form. 1/2728 useless extension candidates. Maximal degree in co-relation 16882. Up to 2371 conditions per place. [2024-06-21 20:03:06,453 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 207 selfloop transitions, 60 changer transitions 0/274 dead transitions. [2024-06-21 20:03:06,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 274 transitions, 3795 flow [2024-06-21 20:03:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:03:06,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 20:03:06,454 INFO L175 Difference]: Start difference. First operand has 192 places, 236 transitions, 2771 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:03:06,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 274 transitions, 3795 flow [2024-06-21 20:03:06,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 274 transitions, 3740 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:06,682 INFO L231 Difference]: Finished difference. Result has 195 places, 248 transitions, 3025 flow [2024-06-21 20:03:06,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3025, PETRI_PLACES=195, PETRI_TRANSITIONS=248} [2024-06-21 20:03:06,683 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-21 20:03:06,683 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 248 transitions, 3025 flow [2024-06-21 20:03:06,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:06,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:06,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:06,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:03:06,684 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:06,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:06,684 INFO L85 PathProgramCache]: Analyzing trace with hash -933443812, now seen corresponding path program 4 times [2024-06-21 20:03:06,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:06,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596925970] [2024-06-21 20:03:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:06,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:06,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:06,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596925970] [2024-06-21 20:03:06,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596925970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:06,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:06,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:06,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980854798] [2024-06-21 20:03:06,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:06,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:06,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:06,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:06,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:06,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:06,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 248 transitions, 3025 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:06,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:06,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:06,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:07,273 INFO L124 PetriNetUnfolderBase]: 1632/2751 cut-off events. [2024-06-21 20:03:07,273 INFO L125 PetriNetUnfolderBase]: For 108085/108085 co-relation queries the response was YES. [2024-06-21 20:03:07,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17355 conditions, 2751 events. 1632/2751 cut-off events. For 108085/108085 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 16118 event pairs, 359 based on Foata normal form. 1/2745 useless extension candidates. Maximal degree in co-relation 17261. Up to 2379 conditions per place. [2024-06-21 20:03:07,295 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 208 selfloop transitions, 67 changer transitions 0/282 dead transitions. [2024-06-21 20:03:07,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 282 transitions, 4002 flow [2024-06-21 20:03:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:03:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:03:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-21 20:03:07,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:03:07,296 INFO L175 Difference]: Start difference. First operand has 195 places, 248 transitions, 3025 flow. Second operand 9 states and 207 transitions. [2024-06-21 20:03:07,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 282 transitions, 4002 flow [2024-06-21 20:03:07,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 282 transitions, 3890 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:07,535 INFO L231 Difference]: Finished difference. Result has 202 places, 254 transitions, 3142 flow [2024-06-21 20:03:07,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2928, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3142, PETRI_PLACES=202, PETRI_TRANSITIONS=254} [2024-06-21 20:03:07,535 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-21 20:03:07,535 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 254 transitions, 3142 flow [2024-06-21 20:03:07,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:07,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:07,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:07,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:03:07,536 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:07,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:07,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2081553146, now seen corresponding path program 1 times [2024-06-21 20:03:07,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:07,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550831437] [2024-06-21 20:03:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:07,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:07,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:07,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550831437] [2024-06-21 20:03:07,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550831437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:07,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:07,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:07,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882751153] [2024-06-21 20:03:07,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:07,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:07,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:07,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:07,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 254 transitions, 3142 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:07,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:07,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:07,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:08,020 INFO L124 PetriNetUnfolderBase]: 1637/2760 cut-off events. [2024-06-21 20:03:08,020 INFO L125 PetriNetUnfolderBase]: For 112503/112503 co-relation queries the response was YES. [2024-06-21 20:03:08,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17522 conditions, 2760 events. 1637/2760 cut-off events. For 112503/112503 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 16181 event pairs, 359 based on Foata normal form. 1/2754 useless extension candidates. Maximal degree in co-relation 17427. Up to 2406 conditions per place. [2024-06-21 20:03:08,043 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 214 selfloop transitions, 58 changer transitions 0/279 dead transitions. [2024-06-21 20:03:08,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 279 transitions, 3972 flow [2024-06-21 20:03:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:03:08,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:03:08,045 INFO L175 Difference]: Start difference. First operand has 202 places, 254 transitions, 3142 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:03:08,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 279 transitions, 3972 flow [2024-06-21 20:03:08,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 279 transitions, 3818 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:08,372 INFO L231 Difference]: Finished difference. Result has 203 places, 257 transitions, 3158 flow [2024-06-21 20:03:08,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2994, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3158, PETRI_PLACES=203, PETRI_TRANSITIONS=257} [2024-06-21 20:03:08,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-21 20:03:08,373 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 257 transitions, 3158 flow [2024-06-21 20:03:08,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:08,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:08,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:08,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:03:08,373 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:08,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:08,374 INFO L85 PathProgramCache]: Analyzing trace with hash 271145592, now seen corresponding path program 5 times [2024-06-21 20:03:08,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:08,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718309430] [2024-06-21 20:03:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:08,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:08,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:08,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718309430] [2024-06-21 20:03:08,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718309430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:08,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:08,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:08,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717384129] [2024-06-21 20:03:08,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:08,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:08,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:08,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:08,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:08,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:08,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 257 transitions, 3158 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:08,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:08,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:08,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:08,928 INFO L124 PetriNetUnfolderBase]: 1666/2798 cut-off events. [2024-06-21 20:03:08,928 INFO L125 PetriNetUnfolderBase]: For 120328/120328 co-relation queries the response was YES. [2024-06-21 20:03:08,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17945 conditions, 2798 events. 1666/2798 cut-off events. For 120328/120328 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16398 event pairs, 371 based on Foata normal form. 1/2788 useless extension candidates. Maximal degree in co-relation 17849. Up to 2255 conditions per place. [2024-06-21 20:03:08,946 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 172 selfloop transitions, 109 changer transitions 0/288 dead transitions. [2024-06-21 20:03:08,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 288 transitions, 4264 flow [2024-06-21 20:03:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:03:08,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 20:03:08,947 INFO L175 Difference]: Start difference. First operand has 203 places, 257 transitions, 3158 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:03:08,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 288 transitions, 4264 flow [2024-06-21 20:03:09,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 288 transitions, 4146 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:09,342 INFO L231 Difference]: Finished difference. Result has 206 places, 267 transitions, 3382 flow [2024-06-21 20:03:09,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3382, PETRI_PLACES=206, PETRI_TRANSITIONS=267} [2024-06-21 20:03:09,343 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-21 20:03:09,343 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 267 transitions, 3382 flow [2024-06-21 20:03:09,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:09,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:09,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:09,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:03:09,344 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:09,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:09,344 INFO L85 PathProgramCache]: Analyzing trace with hash -837856450, now seen corresponding path program 2 times [2024-06-21 20:03:09,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:09,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110846391] [2024-06-21 20:03:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:09,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:09,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:09,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110846391] [2024-06-21 20:03:09,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110846391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:09,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:09,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:09,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248338757] [2024-06-21 20:03:09,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:09,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:09,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:09,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:09,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:09,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:09,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 267 transitions, 3382 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:09,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:09,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:09,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:09,869 INFO L124 PetriNetUnfolderBase]: 1671/2814 cut-off events. [2024-06-21 20:03:09,869 INFO L125 PetriNetUnfolderBase]: For 125540/125540 co-relation queries the response was YES. [2024-06-21 20:03:09,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18279 conditions, 2814 events. 1671/2814 cut-off events. For 125540/125540 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 16560 event pairs, 358 based on Foata normal form. 1/2808 useless extension candidates. Maximal degree in co-relation 18182. Up to 2452 conditions per place. [2024-06-21 20:03:09,894 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 222 selfloop transitions, 61 changer transitions 0/290 dead transitions. [2024-06-21 20:03:09,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 290 transitions, 4234 flow [2024-06-21 20:03:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 20:03:09,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-21 20:03:09,896 INFO L175 Difference]: Start difference. First operand has 206 places, 267 transitions, 3382 flow. Second operand 8 states and 182 transitions. [2024-06-21 20:03:09,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 290 transitions, 4234 flow [2024-06-21 20:03:10,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 290 transitions, 4048 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:10,283 INFO L231 Difference]: Finished difference. Result has 211 places, 270 transitions, 3370 flow [2024-06-21 20:03:10,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3370, PETRI_PLACES=211, PETRI_TRANSITIONS=270} [2024-06-21 20:03:10,284 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-21 20:03:10,284 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 270 transitions, 3370 flow [2024-06-21 20:03:10,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:10,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:10,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:10,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:03:10,285 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:10,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:10,285 INFO L85 PathProgramCache]: Analyzing trace with hash 271265562, now seen corresponding path program 6 times [2024-06-21 20:03:10,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:10,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730630527] [2024-06-21 20:03:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:10,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:10,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:10,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730630527] [2024-06-21 20:03:10,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730630527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:10,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:10,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:10,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2955371] [2024-06-21 20:03:10,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:10,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:10,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:10,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:10,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:10,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:10,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 270 transitions, 3370 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:10,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:10,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:10,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:10,836 INFO L124 PetriNetUnfolderBase]: 1668/2809 cut-off events. [2024-06-21 20:03:10,836 INFO L125 PetriNetUnfolderBase]: For 129030/129030 co-relation queries the response was YES. [2024-06-21 20:03:10,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18141 conditions, 2809 events. 1668/2809 cut-off events. For 129030/129030 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 16525 event pairs, 361 based on Foata normal form. 1/2803 useless extension candidates. Maximal degree in co-relation 18043. Up to 2445 conditions per place. [2024-06-21 20:03:10,862 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 218 selfloop transitions, 64 changer transitions 0/289 dead transitions. [2024-06-21 20:03:10,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 289 transitions, 4176 flow [2024-06-21 20:03:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:03:10,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 20:03:10,864 INFO L175 Difference]: Start difference. First operand has 211 places, 270 transitions, 3370 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:03:10,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 289 transitions, 4176 flow [2024-06-21 20:03:11,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 289 transitions, 4044 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:11,318 INFO L231 Difference]: Finished difference. Result has 214 places, 270 transitions, 3372 flow [2024-06-21 20:03:11,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3238, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3372, PETRI_PLACES=214, PETRI_TRANSITIONS=270} [2024-06-21 20:03:11,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-21 20:03:11,319 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 270 transitions, 3372 flow [2024-06-21 20:03:11,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:11,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:11,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:11,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:03:11,320 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:11,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash 271142616, now seen corresponding path program 3 times [2024-06-21 20:03:11,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:11,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465337874] [2024-06-21 20:03:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:11,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:11,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:11,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465337874] [2024-06-21 20:03:11,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465337874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:11,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:11,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:11,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464478376] [2024-06-21 20:03:11,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:11,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:11,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:11,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:11,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:11,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:11,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 270 transitions, 3372 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:11,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:11,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:11,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:11,829 INFO L124 PetriNetUnfolderBase]: 1676/2827 cut-off events. [2024-06-21 20:03:11,830 INFO L125 PetriNetUnfolderBase]: For 134571/134571 co-relation queries the response was YES. [2024-06-21 20:03:11,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18241 conditions, 2827 events. 1676/2827 cut-off events. For 134571/134571 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16630 event pairs, 343 based on Foata normal form. 2/2827 useless extension candidates. Maximal degree in co-relation 18142. Up to 2543 conditions per place. [2024-06-21 20:03:11,855 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 256 selfloop transitions, 27 changer transitions 0/290 dead transitions. [2024-06-21 20:03:11,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 290 transitions, 3996 flow [2024-06-21 20:03:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:11,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 20:03:11,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-21 20:03:11,857 INFO L175 Difference]: Start difference. First operand has 214 places, 270 transitions, 3372 flow. Second operand 7 states and 157 transitions. [2024-06-21 20:03:11,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 290 transitions, 3996 flow [2024-06-21 20:03:12,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 290 transitions, 3862 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:12,314 INFO L231 Difference]: Finished difference. Result has 216 places, 272 transitions, 3315 flow [2024-06-21 20:03:12,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3238, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3315, PETRI_PLACES=216, PETRI_TRANSITIONS=272} [2024-06-21 20:03:12,314 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 20:03:12,315 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 272 transitions, 3315 flow [2024-06-21 20:03:12,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:12,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:12,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:12,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:03:12,315 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:12,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:12,316 INFO L85 PathProgramCache]: Analyzing trace with hash 271512012, now seen corresponding path program 1 times [2024-06-21 20:03:12,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:12,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329266155] [2024-06-21 20:03:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:12,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:12,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329266155] [2024-06-21 20:03:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329266155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:12,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:12,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:12,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665011252] [2024-06-21 20:03:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:12,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:12,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:12,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 272 transitions, 3315 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:12,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:12,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:12,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:12,832 INFO L124 PetriNetUnfolderBase]: 1671/2824 cut-off events. [2024-06-21 20:03:12,832 INFO L125 PetriNetUnfolderBase]: For 153689/153689 co-relation queries the response was YES. [2024-06-21 20:03:12,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18238 conditions, 2824 events. 1671/2824 cut-off events. For 153689/153689 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 16744 event pairs, 367 based on Foata normal form. 12/2815 useless extension candidates. Maximal degree in co-relation 18138. Up to 2284 conditions per place. [2024-06-21 20:03:12,858 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 168 selfloop transitions, 97 changer transitions 0/297 dead transitions. [2024-06-21 20:03:12,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 297 transitions, 4153 flow [2024-06-21 20:03:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:03:12,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-21 20:03:12,860 INFO L175 Difference]: Start difference. First operand has 216 places, 272 transitions, 3315 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:03:12,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 297 transitions, 4153 flow [2024-06-21 20:03:13,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 297 transitions, 4102 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:13,360 INFO L231 Difference]: Finished difference. Result has 219 places, 274 transitions, 3501 flow [2024-06-21 20:03:13,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3501, PETRI_PLACES=219, PETRI_TRANSITIONS=274} [2024-06-21 20:03:13,361 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-21 20:03:13,361 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 274 transitions, 3501 flow [2024-06-21 20:03:13,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:13,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:13,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:13,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:03:13,362 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:13,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:13,362 INFO L85 PathProgramCache]: Analyzing trace with hash -751735066, now seen corresponding path program 3 times [2024-06-21 20:03:13,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:13,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350651239] [2024-06-21 20:03:13,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:13,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:13,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:13,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350651239] [2024-06-21 20:03:13,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350651239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:13,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:13,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:13,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303336644] [2024-06-21 20:03:13,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:13,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:13,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:13,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:13,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:13,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:13,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 274 transitions, 3501 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:13,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:13,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:13,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:13,904 INFO L124 PetriNetUnfolderBase]: 1717/2897 cut-off events. [2024-06-21 20:03:13,904 INFO L125 PetriNetUnfolderBase]: For 146287/146301 co-relation queries the response was YES. [2024-06-21 20:03:13,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18952 conditions, 2897 events. 1717/2897 cut-off events. For 146287/146301 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17184 event pairs, 378 based on Foata normal form. 11/2901 useless extension candidates. Maximal degree in co-relation 18850. Up to 2525 conditions per place. [2024-06-21 20:03:13,924 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 225 selfloop transitions, 56 changer transitions 0/288 dead transitions. [2024-06-21 20:03:13,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 288 transitions, 4201 flow [2024-06-21 20:03:13,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:03:13,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:03:13,926 INFO L175 Difference]: Start difference. First operand has 219 places, 274 transitions, 3501 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:03:13,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 288 transitions, 4201 flow [2024-06-21 20:03:14,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 288 transitions, 3998 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:14,295 INFO L231 Difference]: Finished difference. Result has 220 places, 274 transitions, 3416 flow [2024-06-21 20:03:14,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3416, PETRI_PLACES=220, PETRI_TRANSITIONS=274} [2024-06-21 20:03:14,295 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-21 20:03:14,295 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 274 transitions, 3416 flow [2024-06-21 20:03:14,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:14,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:14,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:14,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:03:14,297 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:14,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2016968804, now seen corresponding path program 7 times [2024-06-21 20:03:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:14,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130227915] [2024-06-21 20:03:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:14,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:14,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130227915] [2024-06-21 20:03:14,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130227915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:14,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:14,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:14,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889247324] [2024-06-21 20:03:14,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:14,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:14,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:14,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:14,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:14,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:14,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 274 transitions, 3416 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:14,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:14,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:14,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:14,838 INFO L124 PetriNetUnfolderBase]: 1719/2886 cut-off events. [2024-06-21 20:03:14,838 INFO L125 PetriNetUnfolderBase]: For 148215/148215 co-relation queries the response was YES. [2024-06-21 20:03:14,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18791 conditions, 2886 events. 1719/2886 cut-off events. For 148215/148215 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 16994 event pairs, 365 based on Foata normal form. 2/2881 useless extension candidates. Maximal degree in co-relation 18688. Up to 2383 conditions per place. [2024-06-21 20:03:14,867 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 192 selfloop transitions, 107 changer transitions 0/306 dead transitions. [2024-06-21 20:03:14,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 306 transitions, 4438 flow [2024-06-21 20:03:14,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:03:14,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-21 20:03:14,870 INFO L175 Difference]: Start difference. First operand has 220 places, 274 transitions, 3416 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:03:14,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 306 transitions, 4438 flow [2024-06-21 20:03:15,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 306 transitions, 4304 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:15,398 INFO L231 Difference]: Finished difference. Result has 224 places, 277 transitions, 3573 flow [2024-06-21 20:03:15,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3282, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3573, PETRI_PLACES=224, PETRI_TRANSITIONS=277} [2024-06-21 20:03:15,399 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-21 20:03:15,399 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 277 transitions, 3573 flow [2024-06-21 20:03:15,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:15,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:15,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:15,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:03:15,400 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:15,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2083741160, now seen corresponding path program 4 times [2024-06-21 20:03:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:15,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853555345] [2024-06-21 20:03:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:15,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:15,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:15,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853555345] [2024-06-21 20:03:15,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853555345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:15,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:15,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:15,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863015495] [2024-06-21 20:03:15,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:15,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:15,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:15,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:15,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:15,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 277 transitions, 3573 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:15,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:15,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:15,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:15,935 INFO L124 PetriNetUnfolderBase]: 1716/2887 cut-off events. [2024-06-21 20:03:15,935 INFO L125 PetriNetUnfolderBase]: For 151229/151229 co-relation queries the response was YES. [2024-06-21 20:03:15,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19028 conditions, 2887 events. 1716/2887 cut-off events. For 151229/151229 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17037 event pairs, 362 based on Foata normal form. 1/2881 useless extension candidates. Maximal degree in co-relation 18923. Up to 2525 conditions per place. [2024-06-21 20:03:15,960 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 226 selfloop transitions, 60 changer transitions 0/293 dead transitions. [2024-06-21 20:03:15,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 293 transitions, 4185 flow [2024-06-21 20:03:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 20:03:15,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:03:15,963 INFO L175 Difference]: Start difference. First operand has 224 places, 277 transitions, 3573 flow. Second operand 6 states and 144 transitions. [2024-06-21 20:03:15,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 293 transitions, 4185 flow [2024-06-21 20:03:16,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 293 transitions, 3958 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:16,523 INFO L231 Difference]: Finished difference. Result has 224 places, 277 transitions, 3480 flow [2024-06-21 20:03:16,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3346, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3480, PETRI_PLACES=224, PETRI_TRANSITIONS=277} [2024-06-21 20:03:16,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-21 20:03:16,523 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 277 transitions, 3480 flow [2024-06-21 20:03:16,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:16,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:16,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:16,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:03:16,524 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:16,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash 180117326, now seen corresponding path program 8 times [2024-06-21 20:03:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:16,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710373866] [2024-06-21 20:03:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:16,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:16,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:16,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710373866] [2024-06-21 20:03:16,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710373866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:16,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:16,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:16,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488011260] [2024-06-21 20:03:16,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:16,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:16,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:16,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:16,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:16,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:16,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 277 transitions, 3480 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:16,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:16,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:16,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:17,131 INFO L124 PetriNetUnfolderBase]: 1710/2874 cut-off events. [2024-06-21 20:03:17,131 INFO L125 PetriNetUnfolderBase]: For 144196/144196 co-relation queries the response was YES. [2024-06-21 20:03:17,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18648 conditions, 2874 events. 1710/2874 cut-off events. For 144196/144196 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 16905 event pairs, 365 based on Foata normal form. 2/2869 useless extension candidates. Maximal degree in co-relation 18543. Up to 2376 conditions per place. [2024-06-21 20:03:17,162 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 190 selfloop transitions, 110 changer transitions 0/307 dead transitions. [2024-06-21 20:03:17,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 307 transitions, 4366 flow [2024-06-21 20:03:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:03:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:03:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 20:03:17,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-21 20:03:17,173 INFO L175 Difference]: Start difference. First operand has 224 places, 277 transitions, 3480 flow. Second operand 9 states and 217 transitions. [2024-06-21 20:03:17,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 307 transitions, 4366 flow [2024-06-21 20:03:17,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 307 transitions, 4216 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:17,647 INFO L231 Difference]: Finished difference. Result has 226 places, 277 transitions, 3577 flow [2024-06-21 20:03:17,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3577, PETRI_PLACES=226, PETRI_TRANSITIONS=277} [2024-06-21 20:03:17,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-21 20:03:17,649 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 277 transitions, 3577 flow [2024-06-21 20:03:17,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:17,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:17,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:17,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:03:17,650 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:17,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:17,650 INFO L85 PathProgramCache]: Analyzing trace with hash 308144432, now seen corresponding path program 9 times [2024-06-21 20:03:17,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:17,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740108600] [2024-06-21 20:03:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:17,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:17,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:17,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740108600] [2024-06-21 20:03:17,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740108600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:17,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:17,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:17,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419187470] [2024-06-21 20:03:17,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:17,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:17,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:17,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:17,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:17,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 277 transitions, 3577 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:17,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:17,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:17,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:18,231 INFO L124 PetriNetUnfolderBase]: 1786/3018 cut-off events. [2024-06-21 20:03:18,232 INFO L125 PetriNetUnfolderBase]: For 144268/144271 co-relation queries the response was YES. [2024-06-21 20:03:18,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19653 conditions, 3018 events. 1786/3018 cut-off events. For 144268/144271 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18040 event pairs, 352 based on Foata normal form. 6/3021 useless extension candidates. Maximal degree in co-relation 19549. Up to 2573 conditions per place. [2024-06-21 20:03:18,260 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 75 changer transitions 0/334 dead transitions. [2024-06-21 20:03:18,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 334 transitions, 4857 flow [2024-06-21 20:03:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 20:03:18,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:03:18,262 INFO L175 Difference]: Start difference. First operand has 226 places, 277 transitions, 3577 flow. Second operand 6 states and 160 transitions. [2024-06-21 20:03:18,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 334 transitions, 4857 flow [2024-06-21 20:03:18,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 334 transitions, 4594 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 20:03:18,784 INFO L231 Difference]: Finished difference. Result has 224 places, 305 transitions, 4006 flow [2024-06-21 20:03:18,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4006, PETRI_PLACES=224, PETRI_TRANSITIONS=305} [2024-06-21 20:03:18,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-21 20:03:18,785 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 305 transitions, 4006 flow [2024-06-21 20:03:18,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:18,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:18,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:18,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:03:18,785 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:18,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:18,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1377573274, now seen corresponding path program 10 times [2024-06-21 20:03:18,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:18,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810412222] [2024-06-21 20:03:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:18,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:18,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:18,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810412222] [2024-06-21 20:03:18,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810412222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:18,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:18,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:18,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118597564] [2024-06-21 20:03:18,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:18,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:18,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:18,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:18,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:18,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 305 transitions, 4006 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:18,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:18,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:18,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:19,397 INFO L124 PetriNetUnfolderBase]: 1788/3025 cut-off events. [2024-06-21 20:03:19,397 INFO L125 PetriNetUnfolderBase]: For 133017/133023 co-relation queries the response was YES. [2024-06-21 20:03:19,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19951 conditions, 3025 events. 1788/3025 cut-off events. For 133017/133023 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 18093 event pairs, 352 based on Foata normal form. 6/3028 useless extension candidates. Maximal degree in co-relation 19847. Up to 2612 conditions per place. [2024-06-21 20:03:19,478 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 258 selfloop transitions, 69 changer transitions 0/334 dead transitions. [2024-06-21 20:03:19,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 334 transitions, 4776 flow [2024-06-21 20:03:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:19,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:03:19,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:03:19,479 INFO L175 Difference]: Start difference. First operand has 224 places, 305 transitions, 4006 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:03:19,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 334 transitions, 4776 flow [2024-06-21 20:03:20,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 334 transitions, 4700 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:20,023 INFO L231 Difference]: Finished difference. Result has 229 places, 308 transitions, 4138 flow [2024-06-21 20:03:20,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3930, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4138, PETRI_PLACES=229, PETRI_TRANSITIONS=308} [2024-06-21 20:03:20,024 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-21 20:03:20,024 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 308 transitions, 4138 flow [2024-06-21 20:03:20,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:20,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:20,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:20,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:03:20,029 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:20,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:20,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1911810702, now seen corresponding path program 11 times [2024-06-21 20:03:20,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:20,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552512784] [2024-06-21 20:03:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:20,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:20,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:20,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552512784] [2024-06-21 20:03:20,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552512784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:20,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:20,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:20,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125935010] [2024-06-21 20:03:20,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:20,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:20,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:20,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:20,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:20,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 308 transitions, 4138 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:20,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:20,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:20,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:20,624 INFO L124 PetriNetUnfolderBase]: 1814/3067 cut-off events. [2024-06-21 20:03:20,624 INFO L125 PetriNetUnfolderBase]: For 140703/140709 co-relation queries the response was YES. [2024-06-21 20:03:20,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20783 conditions, 3067 events. 1814/3067 cut-off events. For 140703/140709 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 18363 event pairs, 352 based on Foata normal form. 6/3070 useless extension candidates. Maximal degree in co-relation 20678. Up to 2507 conditions per place. [2024-06-21 20:03:20,653 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 220 selfloop transitions, 123 changer transitions 0/350 dead transitions. [2024-06-21 20:03:20,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 350 transitions, 5176 flow [2024-06-21 20:03:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 20:03:20,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6535714285714286 [2024-06-21 20:03:20,654 INFO L175 Difference]: Start difference. First operand has 229 places, 308 transitions, 4138 flow. Second operand 7 states and 183 transitions. [2024-06-21 20:03:20,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 350 transitions, 5176 flow [2024-06-21 20:03:21,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 350 transitions, 5003 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:21,196 INFO L231 Difference]: Finished difference. Result has 233 places, 320 transitions, 4482 flow [2024-06-21 20:03:21,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3965, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4482, PETRI_PLACES=233, PETRI_TRANSITIONS=320} [2024-06-21 20:03:21,197 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-21 20:03:21,197 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 320 transitions, 4482 flow [2024-06-21 20:03:21,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:21,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:21,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:21,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:03:21,198 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:21,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:21,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1911807726, now seen corresponding path program 4 times [2024-06-21 20:03:21,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:21,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000710203] [2024-06-21 20:03:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:21,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:21,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:21,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000710203] [2024-06-21 20:03:21,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000710203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:21,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:21,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:21,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676214650] [2024-06-21 20:03:21,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:21,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:21,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:21,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:21,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:21,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:21,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 320 transitions, 4482 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:21,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:21,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:21,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:21,797 INFO L124 PetriNetUnfolderBase]: 1837/3103 cut-off events. [2024-06-21 20:03:21,798 INFO L125 PetriNetUnfolderBase]: For 156638/156638 co-relation queries the response was YES. [2024-06-21 20:03:21,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21591 conditions, 3103 events. 1837/3103 cut-off events. For 156638/156638 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 18607 event pairs, 270 based on Foata normal form. 10/3111 useless extension candidates. Maximal degree in co-relation 21485. Up to 2720 conditions per place. [2024-06-21 20:03:21,826 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 312 selfloop transitions, 31 changer transitions 0/350 dead transitions. [2024-06-21 20:03:21,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 350 transitions, 5282 flow [2024-06-21 20:03:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:03:21,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-21 20:03:21,828 INFO L175 Difference]: Start difference. First operand has 233 places, 320 transitions, 4482 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:03:21,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 350 transitions, 5282 flow [2024-06-21 20:03:22,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 350 transitions, 5131 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:22,295 INFO L231 Difference]: Finished difference. Result has 235 places, 321 transitions, 4416 flow [2024-06-21 20:03:22,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4331, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4416, PETRI_PLACES=235, PETRI_TRANSITIONS=321} [2024-06-21 20:03:22,296 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-21 20:03:22,296 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 321 transitions, 4416 flow [2024-06-21 20:03:22,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:22,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:22,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:22,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:03:22,296 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:22,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:22,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1982103572, now seen corresponding path program 2 times [2024-06-21 20:03:22,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:22,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418150926] [2024-06-21 20:03:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:22,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:22,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:22,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418150926] [2024-06-21 20:03:22,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418150926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:22,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:22,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:22,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112711953] [2024-06-21 20:03:22,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:22,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:22,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:22,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:22,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:22,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:22,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 321 transitions, 4416 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:22,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:22,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:22,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:22,916 INFO L124 PetriNetUnfolderBase]: 1826/3101 cut-off events. [2024-06-21 20:03:22,917 INFO L125 PetriNetUnfolderBase]: For 163703/163703 co-relation queries the response was YES. [2024-06-21 20:03:22,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21657 conditions, 3101 events. 1826/3101 cut-off events. For 163703/163703 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 18872 event pairs, 345 based on Foata normal form. 14/3098 useless extension candidates. Maximal degree in co-relation 21550. Up to 2575 conditions per place. [2024-06-21 20:03:22,945 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 255 selfloop transitions, 62 changer transitions 0/350 dead transitions. [2024-06-21 20:03:22,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 350 transitions, 5194 flow [2024-06-21 20:03:22,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 20:03:22,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-06-21 20:03:22,946 INFO L175 Difference]: Start difference. First operand has 235 places, 321 transitions, 4416 flow. Second operand 6 states and 159 transitions. [2024-06-21 20:03:22,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 350 transitions, 5194 flow [2024-06-21 20:03:23,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 350 transitions, 5133 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:23,345 INFO L231 Difference]: Finished difference. Result has 237 places, 324 transitions, 4550 flow [2024-06-21 20:03:23,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4355, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4550, PETRI_PLACES=237, PETRI_TRANSITIONS=324} [2024-06-21 20:03:23,346 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-21 20:03:23,346 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 324 transitions, 4550 flow [2024-06-21 20:03:23,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:23,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:23,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:23,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:03:23,347 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:23,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:23,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1377819724, now seen corresponding path program 3 times [2024-06-21 20:03:23,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:23,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200704618] [2024-06-21 20:03:23,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:23,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:23,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:23,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200704618] [2024-06-21 20:03:23,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200704618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:23,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:23,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:23,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93396120] [2024-06-21 20:03:23,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:23,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:23,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:23,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:23,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:23,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 324 transitions, 4550 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:23,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:23,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:23,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:24,085 INFO L124 PetriNetUnfolderBase]: 1866/3170 cut-off events. [2024-06-21 20:03:24,086 INFO L125 PetriNetUnfolderBase]: For 167958/167958 co-relation queries the response was YES. [2024-06-21 20:03:24,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22509 conditions, 3170 events. 1866/3170 cut-off events. For 167958/167958 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 19325 event pairs, 358 based on Foata normal form. 12/3165 useless extension candidates. Maximal degree in co-relation 22401. Up to 2638 conditions per place. [2024-06-21 20:03:24,128 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 246 selfloop transitions, 73 changer transitions 0/352 dead transitions. [2024-06-21 20:03:24,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 352 transitions, 5536 flow [2024-06-21 20:03:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:03:24,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:03:24,129 INFO L175 Difference]: Start difference. First operand has 237 places, 324 transitions, 4550 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:03:24,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 352 transitions, 5536 flow [2024-06-21 20:03:24,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 352 transitions, 5405 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:24,671 INFO L231 Difference]: Finished difference. Result has 240 places, 326 transitions, 4622 flow [2024-06-21 20:03:24,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4419, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4622, PETRI_PLACES=240, PETRI_TRANSITIONS=326} [2024-06-21 20:03:24,672 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-21 20:03:24,672 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 326 transitions, 4622 flow [2024-06-21 20:03:24,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:24,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:24,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:24,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:03:24,672 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:24,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:24,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1967818772, now seen corresponding path program 4 times [2024-06-21 20:03:24,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:24,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926120271] [2024-06-21 20:03:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:24,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:24,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:24,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926120271] [2024-06-21 20:03:24,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926120271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:24,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:24,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:24,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260344273] [2024-06-21 20:03:24,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:24,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:24,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:24,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:24,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:24,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:24,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 326 transitions, 4622 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:24,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:24,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:24,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:25,352 INFO L124 PetriNetUnfolderBase]: 2023/3413 cut-off events. [2024-06-21 20:03:25,352 INFO L125 PetriNetUnfolderBase]: For 201437/201437 co-relation queries the response was YES. [2024-06-21 20:03:25,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24916 conditions, 3413 events. 2023/3413 cut-off events. For 201437/201437 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20874 event pairs, 304 based on Foata normal form. 14/3410 useless extension candidates. Maximal degree in co-relation 24807. Up to 2583 conditions per place. [2024-06-21 20:03:25,383 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 266 selfloop transitions, 64 changer transitions 0/363 dead transitions. [2024-06-21 20:03:25,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 363 transitions, 5624 flow [2024-06-21 20:03:25,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-21 20:03:25,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-06-21 20:03:25,385 INFO L175 Difference]: Start difference. First operand has 240 places, 326 transitions, 4622 flow. Second operand 6 states and 164 transitions. [2024-06-21 20:03:25,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 363 transitions, 5624 flow [2024-06-21 20:03:26,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 363 transitions, 5459 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:26,039 INFO L231 Difference]: Finished difference. Result has 242 places, 332 transitions, 4735 flow [2024-06-21 20:03:26,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4735, PETRI_PLACES=242, PETRI_TRANSITIONS=332} [2024-06-21 20:03:26,040 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-21 20:03:26,040 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 332 transitions, 4735 flow [2024-06-21 20:03:26,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:26,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:26,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:26,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:03:26,041 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:26,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1851881108, now seen corresponding path program 1 times [2024-06-21 20:03:26,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:26,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316739837] [2024-06-21 20:03:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:26,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:26,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:26,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316739837] [2024-06-21 20:03:26,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316739837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:26,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:26,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:26,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95495884] [2024-06-21 20:03:26,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:26,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:26,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:26,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:26,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:26,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:26,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 332 transitions, 4735 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:26,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:26,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:26,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:26,683 INFO L124 PetriNetUnfolderBase]: 2119/3543 cut-off events. [2024-06-21 20:03:26,684 INFO L125 PetriNetUnfolderBase]: For 202439/202456 co-relation queries the response was YES. [2024-06-21 20:03:26,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26231 conditions, 3543 events. 2119/3543 cut-off events. For 202439/202456 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21563 event pairs, 384 based on Foata normal form. 16/3552 useless extension candidates. Maximal degree in co-relation 26120. Up to 3027 conditions per place. [2024-06-21 20:03:26,719 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 282 selfloop transitions, 70 changer transitions 0/359 dead transitions. [2024-06-21 20:03:26,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 359 transitions, 5728 flow [2024-06-21 20:03:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 20:03:26,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 20:03:26,720 INFO L175 Difference]: Start difference. First operand has 242 places, 332 transitions, 4735 flow. Second operand 6 states and 145 transitions. [2024-06-21 20:03:26,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 359 transitions, 5728 flow [2024-06-21 20:03:27,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 359 transitions, 5639 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:27,395 INFO L231 Difference]: Finished difference. Result has 247 places, 340 transitions, 4952 flow [2024-06-21 20:03:27,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4648, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4952, PETRI_PLACES=247, PETRI_TRANSITIONS=340} [2024-06-21 20:03:27,395 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-21 20:03:27,396 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 340 transitions, 4952 flow [2024-06-21 20:03:27,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:27,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:27,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:27,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:03:27,396 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:27,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:27,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2126529556, now seen corresponding path program 2 times [2024-06-21 20:03:27,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:27,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623248626] [2024-06-21 20:03:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:27,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:27,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:27,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623248626] [2024-06-21 20:03:27,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623248626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:27,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:27,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:27,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775059873] [2024-06-21 20:03:27,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:27,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:27,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:27,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:27,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:27,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:27,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 340 transitions, 4952 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:27,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:27,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:27,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:28,074 INFO L124 PetriNetUnfolderBase]: 2122/3556 cut-off events. [2024-06-21 20:03:28,074 INFO L125 PetriNetUnfolderBase]: For 206286/206303 co-relation queries the response was YES. [2024-06-21 20:03:28,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26515 conditions, 3556 events. 2122/3556 cut-off events. For 206286/206303 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21716 event pairs, 443 based on Foata normal form. 16/3565 useless extension candidates. Maximal degree in co-relation 26401. Up to 3121 conditions per place. [2024-06-21 20:03:28,109 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 286 selfloop transitions, 63 changer transitions 0/356 dead transitions. [2024-06-21 20:03:28,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 356 transitions, 5726 flow [2024-06-21 20:03:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:03:28,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:03:28,111 INFO L175 Difference]: Start difference. First operand has 247 places, 340 transitions, 4952 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:03:28,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 356 transitions, 5726 flow [2024-06-21 20:03:28,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 356 transitions, 5570 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:28,746 INFO L231 Difference]: Finished difference. Result has 251 places, 342 transitions, 4974 flow [2024-06-21 20:03:28,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4810, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4974, PETRI_PLACES=251, PETRI_TRANSITIONS=342} [2024-06-21 20:03:28,747 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-21 20:03:28,747 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 342 transitions, 4974 flow [2024-06-21 20:03:28,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:28,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:28,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:03:28,748 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:28,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash 299453396, now seen corresponding path program 3 times [2024-06-21 20:03:28,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:28,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773055364] [2024-06-21 20:03:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:28,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:28,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:28,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773055364] [2024-06-21 20:03:28,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773055364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:28,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:28,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:28,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847138603] [2024-06-21 20:03:28,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:28,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:28,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:28,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:28,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:28,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:28,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 342 transitions, 4974 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:28,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:28,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:29,457 INFO L124 PetriNetUnfolderBase]: 2136/3575 cut-off events. [2024-06-21 20:03:29,457 INFO L125 PetriNetUnfolderBase]: For 221039/221045 co-relation queries the response was YES. [2024-06-21 20:03:29,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26249 conditions, 3575 events. 2136/3575 cut-off events. For 221039/221045 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 21758 event pairs, 349 based on Foata normal form. 24/3596 useless extension candidates. Maximal degree in co-relation 26133. Up to 3042 conditions per place. [2024-06-21 20:03:29,494 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 298 selfloop transitions, 65 changer transitions 0/370 dead transitions. [2024-06-21 20:03:29,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 370 transitions, 5831 flow [2024-06-21 20:03:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:03:29,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:03:29,495 INFO L175 Difference]: Start difference. First operand has 251 places, 342 transitions, 4974 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:03:29,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 370 transitions, 5831 flow [2024-06-21 20:03:29,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 370 transitions, 5683 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:29,939 INFO L231 Difference]: Finished difference. Result has 253 places, 344 transitions, 5017 flow [2024-06-21 20:03:29,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4826, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5017, PETRI_PLACES=253, PETRI_TRANSITIONS=344} [2024-06-21 20:03:29,940 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-21 20:03:29,940 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 344 transitions, 5017 flow [2024-06-21 20:03:29,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:29,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:29,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:03:29,941 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:29,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash 842887714, now seen corresponding path program 1 times [2024-06-21 20:03:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:29,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699556149] [2024-06-21 20:03:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:30,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:30,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699556149] [2024-06-21 20:03:30,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699556149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:30,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:30,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:30,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117274030] [2024-06-21 20:03:30,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:30,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:30,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:30,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:30,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:30,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:30,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 344 transitions, 5017 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) [2024-06-21 20:03:30,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:30,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:30,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:30,585 INFO L124 PetriNetUnfolderBase]: 2141/3589 cut-off events. [2024-06-21 20:03:30,585 INFO L125 PetriNetUnfolderBase]: For 200574/200585 co-relation queries the response was YES. [2024-06-21 20:03:30,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26532 conditions, 3589 events. 2141/3589 cut-off events. For 200574/200585 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21943 event pairs, 468 based on Foata normal form. 9/3590 useless extension candidates. Maximal degree in co-relation 26415. Up to 2960 conditions per place. [2024-06-21 20:03:30,621 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 242 selfloop transitions, 123 changer transitions 0/372 dead transitions. [2024-06-21 20:03:30,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 372 transitions, 6087 flow [2024-06-21 20:03:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:03:30,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:03:30,622 INFO L175 Difference]: Start difference. First operand has 253 places, 344 transitions, 5017 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:03:30,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 372 transitions, 6087 flow [2024-06-21 20:03:31,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 372 transitions, 5947 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:31,191 INFO L231 Difference]: Finished difference. Result has 256 places, 347 transitions, 5175 flow [2024-06-21 20:03:31,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4877, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5175, PETRI_PLACES=256, PETRI_TRANSITIONS=347} [2024-06-21 20:03:31,192 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-21 20:03:31,192 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 347 transitions, 5175 flow [2024-06-21 20:03:31,192 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) [2024-06-21 20:03:31,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:31,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:31,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:03:31,193 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)] === [2024-06-21 20:03:31,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:31,193 INFO L85 PathProgramCache]: Analyzing trace with hash 297897448, now seen corresponding path program 1 times [2024-06-21 20:03:31,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:31,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862737286] [2024-06-21 20:03:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:31,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:31,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:31,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862737286] [2024-06-21 20:03:31,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862737286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:31,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:31,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:31,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088110795] [2024-06-21 20:03:31,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:31,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:31,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:31,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:31,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:31,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:31,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 347 transitions, 5175 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:31,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:31,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:31,909 INFO L124 PetriNetUnfolderBase]: 2162/3603 cut-off events. [2024-06-21 20:03:31,909 INFO L125 PetriNetUnfolderBase]: For 207622/207622 co-relation queries the response was YES. [2024-06-21 20:03:31,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27045 conditions, 3603 events. 2162/3603 cut-off events. For 207622/207622 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21896 event pairs, 476 based on Foata normal form. 1/3589 useless extension candidates. Maximal degree in co-relation 26927. Up to 2751 conditions per place. [2024-06-21 20:03:31,941 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 187 selfloop transitions, 197 changer transitions 0/391 dead transitions. [2024-06-21 20:03:31,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 391 transitions, 6763 flow [2024-06-21 20:03:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 20:03:31,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:03:31,947 INFO L175 Difference]: Start difference. First operand has 256 places, 347 transitions, 5175 flow. Second operand 8 states and 200 transitions. [2024-06-21 20:03:31,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 391 transitions, 6763 flow [2024-06-21 20:03:32,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 391 transitions, 6362 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:32,630 INFO L231 Difference]: Finished difference. Result has 258 places, 360 transitions, 5454 flow [2024-06-21 20:03:32,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4774, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5454, PETRI_PLACES=258, PETRI_TRANSITIONS=360} [2024-06-21 20:03:32,631 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-21 20:03:32,631 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 360 transitions, 5454 flow [2024-06-21 20:03:32,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:32,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:32,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:32,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:03:32,632 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)] === [2024-06-21 20:03:32,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:32,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1958841838, now seen corresponding path program 2 times [2024-06-21 20:03:32,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:32,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773987993] [2024-06-21 20:03:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:32,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:32,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:32,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773987993] [2024-06-21 20:03:32,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773987993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:32,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:32,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:32,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084168425] [2024-06-21 20:03:32,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:32,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:32,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:32,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:32,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:32,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:32,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 360 transitions, 5454 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:32,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:32,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:32,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:33,330 INFO L124 PetriNetUnfolderBase]: 2167/3610 cut-off events. [2024-06-21 20:03:33,331 INFO L125 PetriNetUnfolderBase]: For 215007/215007 co-relation queries the response was YES. [2024-06-21 20:03:33,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27568 conditions, 3610 events. 2167/3610 cut-off events. For 215007/215007 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 21975 event pairs, 464 based on Foata normal form. 1/3596 useless extension candidates. Maximal degree in co-relation 27451. Up to 2995 conditions per place. [2024-06-21 20:03:33,365 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 242 selfloop transitions, 143 changer transitions 0/392 dead transitions. [2024-06-21 20:03:33,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 392 transitions, 6566 flow [2024-06-21 20:03:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:03:33,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-21 20:03:33,366 INFO L175 Difference]: Start difference. First operand has 258 places, 360 transitions, 5454 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:03:33,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 392 transitions, 6566 flow [2024-06-21 20:03:34,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 392 transitions, 6397 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:34,054 INFO L231 Difference]: Finished difference. Result has 264 places, 363 transitions, 5607 flow [2024-06-21 20:03:34,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5285, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5607, PETRI_PLACES=264, PETRI_TRANSITIONS=363} [2024-06-21 20:03:34,055 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-21 20:03:34,055 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 363 transitions, 5607 flow [2024-06-21 20:03:34,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:34,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:34,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:34,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:03:34,056 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)] === [2024-06-21 20:03:34,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1020261220, now seen corresponding path program 2 times [2024-06-21 20:03:34,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:34,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969793962] [2024-06-21 20:03:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:34,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:34,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:34,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969793962] [2024-06-21 20:03:34,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969793962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:34,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:34,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:34,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920856512] [2024-06-21 20:03:34,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:34,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:34,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:34,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:34,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 363 transitions, 5607 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:34,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:34,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:34,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:34,890 INFO L124 PetriNetUnfolderBase]: 2196/3657 cut-off events. [2024-06-21 20:03:34,890 INFO L125 PetriNetUnfolderBase]: For 224559/224559 co-relation queries the response was YES. [2024-06-21 20:03:34,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27845 conditions, 3657 events. 2196/3657 cut-off events. For 224559/224559 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22250 event pairs, 477 based on Foata normal form. 1/3643 useless extension candidates. Maximal degree in co-relation 27725. Up to 2780 conditions per place. [2024-06-21 20:03:34,928 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 187 selfloop transitions, 207 changer transitions 0/401 dead transitions. [2024-06-21 20:03:34,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 401 transitions, 7145 flow [2024-06-21 20:03:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:34,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:34,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:03:34,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-21 20:03:34,929 INFO L175 Difference]: Start difference. First operand has 264 places, 363 transitions, 5607 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:03:34,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 401 transitions, 7145 flow [2024-06-21 20:03:35,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 401 transitions, 6921 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:35,686 INFO L231 Difference]: Finished difference. Result has 267 places, 373 transitions, 5997 flow [2024-06-21 20:03:35,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5383, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5997, PETRI_PLACES=267, PETRI_TRANSITIONS=373} [2024-06-21 20:03:35,686 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-21 20:03:35,687 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 373 transitions, 5997 flow [2024-06-21 20:03:35,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:35,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:35,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:35,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:03:35,687 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)] === [2024-06-21 20:03:35,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:35,688 INFO L85 PathProgramCache]: Analyzing trace with hash -702458378, now seen corresponding path program 3 times [2024-06-21 20:03:35,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:35,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53174136] [2024-06-21 20:03:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:35,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:35,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:35,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53174136] [2024-06-21 20:03:35,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53174136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:35,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:35,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:35,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933465960] [2024-06-21 20:03:35,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:35,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:35,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:35,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:35,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:35,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:35,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 373 transitions, 5997 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:35,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:35,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:35,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:36,488 INFO L124 PetriNetUnfolderBase]: 2209/3680 cut-off events. [2024-06-21 20:03:36,488 INFO L125 PetriNetUnfolderBase]: For 235252/235252 co-relation queries the response was YES. [2024-06-21 20:03:36,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28354 conditions, 3680 events. 2209/3680 cut-off events. For 235252/235252 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22431 event pairs, 464 based on Foata normal form. 1/3666 useless extension candidates. Maximal degree in co-relation 28232. Up to 3050 conditions per place. [2024-06-21 20:03:36,526 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 149 changer transitions 0/407 dead transitions. [2024-06-21 20:03:36,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 407 transitions, 7311 flow [2024-06-21 20:03:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:03:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:03:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-21 20:03:36,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-21 20:03:36,527 INFO L175 Difference]: Start difference. First operand has 267 places, 373 transitions, 5997 flow. Second operand 9 states and 211 transitions. [2024-06-21 20:03:36,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 407 transitions, 7311 flow [2024-06-21 20:03:37,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 407 transitions, 6904 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:37,265 INFO L231 Difference]: Finished difference. Result has 272 places, 379 transitions, 5968 flow [2024-06-21 20:03:37,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5598, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5968, PETRI_PLACES=272, PETRI_TRANSITIONS=379} [2024-06-21 20:03:37,266 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-21 20:03:37,266 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 379 transitions, 5968 flow [2024-06-21 20:03:37,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:37,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:37,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:37,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:03:37,266 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)] === [2024-06-21 20:03:37,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:37,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1020024070, now seen corresponding path program 3 times [2024-06-21 20:03:37,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:37,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834432392] [2024-06-21 20:03:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:37,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:37,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:37,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834432392] [2024-06-21 20:03:37,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834432392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:37,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:37,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:37,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266830774] [2024-06-21 20:03:37,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:37,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:37,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:37,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:37,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:37,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:37,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 379 transitions, 5968 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:37,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:37,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:37,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:37,949 INFO L124 PetriNetUnfolderBase]: 2206/3673 cut-off events. [2024-06-21 20:03:37,949 INFO L125 PetriNetUnfolderBase]: For 239201/239201 co-relation queries the response was YES. [2024-06-21 20:03:37,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28150 conditions, 3673 events. 2206/3673 cut-off events. For 239201/239201 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22399 event pairs, 480 based on Foata normal form. 1/3659 useless extension candidates. Maximal degree in co-relation 28027. Up to 2788 conditions per place. [2024-06-21 20:03:37,986 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 192 selfloop transitions, 208 changer transitions 0/407 dead transitions. [2024-06-21 20:03:37,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 407 transitions, 7340 flow [2024-06-21 20:03:37,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:03:37,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-21 20:03:37,988 INFO L175 Difference]: Start difference. First operand has 272 places, 379 transitions, 5968 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:03:37,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 407 transitions, 7340 flow [2024-06-21 20:03:38,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 407 transitions, 7022 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:38,834 INFO L231 Difference]: Finished difference. Result has 274 places, 379 transitions, 6072 flow [2024-06-21 20:03:38,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6072, PETRI_PLACES=274, PETRI_TRANSITIONS=379} [2024-06-21 20:03:38,835 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-21 20:03:38,835 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 379 transitions, 6072 flow [2024-06-21 20:03:38,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:38,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:38,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:38,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:03:38,836 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)] === [2024-06-21 20:03:38,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:38,836 INFO L85 PathProgramCache]: Analyzing trace with hash 754234534, now seen corresponding path program 1 times [2024-06-21 20:03:38,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:38,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345725085] [2024-06-21 20:03:38,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:38,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:38,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:38,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345725085] [2024-06-21 20:03:38,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345725085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:38,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:38,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:38,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558835482] [2024-06-21 20:03:38,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:38,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:38,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:38,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:38,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:39,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:39,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 379 transitions, 6072 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:39,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:39,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:39,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:39,607 INFO L124 PetriNetUnfolderBase]: 2259/3780 cut-off events. [2024-06-21 20:03:39,607 INFO L125 PetriNetUnfolderBase]: For 267726/267726 co-relation queries the response was YES. [2024-06-21 20:03:39,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29196 conditions, 3780 events. 2259/3780 cut-off events. For 267726/267726 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23222 event pairs, 355 based on Foata normal form. 6/3784 useless extension candidates. Maximal degree in co-relation 29072. Up to 3213 conditions per place. [2024-06-21 20:03:39,646 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 351 selfloop transitions, 59 changer transitions 0/417 dead transitions. [2024-06-21 20:03:39,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 417 transitions, 7170 flow [2024-06-21 20:03:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:39,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:03:39,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:03:39,647 INFO L175 Difference]: Start difference. First operand has 274 places, 379 transitions, 6072 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:03:39,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 417 transitions, 7170 flow [2024-06-21 20:03:40,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 417 transitions, 6749 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:40,357 INFO L231 Difference]: Finished difference. Result has 277 places, 381 transitions, 5799 flow [2024-06-21 20:03:40,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5651, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5799, PETRI_PLACES=277, PETRI_TRANSITIONS=381} [2024-06-21 20:03:40,358 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-21 20:03:40,358 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 381 transitions, 5799 flow [2024-06-21 20:03:40,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:40,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:40,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:40,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:03:40,359 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)] === [2024-06-21 20:03:40,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1020258244, now seen corresponding path program 2 times [2024-06-21 20:03:40,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:40,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737180865] [2024-06-21 20:03:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:40,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:40,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737180865] [2024-06-21 20:03:40,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737180865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:40,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:40,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:40,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402242995] [2024-06-21 20:03:40,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:40,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:40,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:40,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:40,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:40,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:40,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 381 transitions, 5799 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:40,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:40,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:40,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:41,060 INFO L124 PetriNetUnfolderBase]: 2287/3828 cut-off events. [2024-06-21 20:03:41,061 INFO L125 PetriNetUnfolderBase]: For 277581/277581 co-relation queries the response was YES. [2024-06-21 20:03:41,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29164 conditions, 3828 events. 2287/3828 cut-off events. For 277581/277581 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 23602 event pairs, 437 based on Foata normal form. 8/3834 useless extension candidates. Maximal degree in co-relation 29039. Up to 3415 conditions per place. [2024-06-21 20:03:41,100 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 351 selfloop transitions, 52 changer transitions 0/410 dead transitions. [2024-06-21 20:03:41,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 410 transitions, 6715 flow [2024-06-21 20:03:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:41,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:03:41,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 20:03:41,101 INFO L175 Difference]: Start difference. First operand has 277 places, 381 transitions, 5799 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:03:41,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 410 transitions, 6715 flow [2024-06-21 20:03:41,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 410 transitions, 6646 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:41,936 INFO L231 Difference]: Finished difference. Result has 281 places, 382 transitions, 5855 flow [2024-06-21 20:03:41,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5730, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5855, PETRI_PLACES=281, PETRI_TRANSITIONS=382} [2024-06-21 20:03:41,936 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-21 20:03:41,937 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 382 transitions, 5855 flow [2024-06-21 20:03:41,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:41,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:41,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:41,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:03:41,937 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)] === [2024-06-21 20:03:41,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:41,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1019931814, now seen corresponding path program 3 times [2024-06-21 20:03:41,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:41,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101905542] [2024-06-21 20:03:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:41,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:42,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101905542] [2024-06-21 20:03:42,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101905542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:42,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:42,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:42,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231828641] [2024-06-21 20:03:42,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:42,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:42,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:42,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:42,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 382 transitions, 5855 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:42,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:42,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:42,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:42,704 INFO L124 PetriNetUnfolderBase]: 2307/3860 cut-off events. [2024-06-21 20:03:42,704 INFO L125 PetriNetUnfolderBase]: For 281367/281367 co-relation queries the response was YES. [2024-06-21 20:03:42,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29548 conditions, 3860 events. 2307/3860 cut-off events. For 281367/281367 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 23853 event pairs, 435 based on Foata normal form. 6/3864 useless extension candidates. Maximal degree in co-relation 29421. Up to 3417 conditions per place. [2024-06-21 20:03:42,742 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 353 selfloop transitions, 54 changer transitions 0/414 dead transitions. [2024-06-21 20:03:42,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 414 transitions, 6799 flow [2024-06-21 20:03:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 20:03:42,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:03:42,743 INFO L175 Difference]: Start difference. First operand has 281 places, 382 transitions, 5855 flow. Second operand 8 states and 188 transitions. [2024-06-21 20:03:42,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 414 transitions, 6799 flow [2024-06-21 20:03:43,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 414 transitions, 6692 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:43,565 INFO L231 Difference]: Finished difference. Result has 283 places, 383 transitions, 5878 flow [2024-06-21 20:03:43,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5878, PETRI_PLACES=283, PETRI_TRANSITIONS=383} [2024-06-21 20:03:43,566 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-21 20:03:43,566 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 383 transitions, 5878 flow [2024-06-21 20:03:43,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:43,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:43,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:03:43,567 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)] === [2024-06-21 20:03:43,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1386185492, now seen corresponding path program 4 times [2024-06-21 20:03:43,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:43,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355340583] [2024-06-21 20:03:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:43,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:43,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:43,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355340583] [2024-06-21 20:03:43,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355340583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:43,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:43,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:43,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229961761] [2024-06-21 20:03:43,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:43,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:43,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:43,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:43,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:43,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:43,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 383 transitions, 5878 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) [2024-06-21 20:03:43,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:43,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:43,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:44,265 INFO L124 PetriNetUnfolderBase]: 2336/3910 cut-off events. [2024-06-21 20:03:44,266 INFO L125 PetriNetUnfolderBase]: For 289219/289230 co-relation queries the response was YES. [2024-06-21 20:03:44,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30136 conditions, 3910 events. 2336/3910 cut-off events. For 289219/289230 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24273 event pairs, 494 based on Foata normal form. 9/3911 useless extension candidates. Maximal degree in co-relation 30008. Up to 3285 conditions per place. [2024-06-21 20:03:44,307 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 286 selfloop transitions, 123 changer transitions 0/416 dead transitions. [2024-06-21 20:03:44,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 416 transitions, 7169 flow [2024-06-21 20:03:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:03:44,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 20:03:44,308 INFO L175 Difference]: Start difference. First operand has 283 places, 383 transitions, 5878 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:03:44,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 416 transitions, 7169 flow [2024-06-21 20:03:45,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 416 transitions, 7053 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:45,157 INFO L231 Difference]: Finished difference. Result has 283 places, 395 transitions, 6168 flow [2024-06-21 20:03:45,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5762, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6168, PETRI_PLACES=283, PETRI_TRANSITIONS=395} [2024-06-21 20:03:45,157 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-21 20:03:45,158 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 395 transitions, 6168 flow [2024-06-21 20:03:45,158 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) [2024-06-21 20:03:45,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:45,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:45,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:03:45,158 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)] === [2024-06-21 20:03:45,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash 278460364, now seen corresponding path program 5 times [2024-06-21 20:03:45,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:45,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215039073] [2024-06-21 20:03:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:45,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:45,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:45,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215039073] [2024-06-21 20:03:45,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215039073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:45,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:45,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:45,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664918284] [2024-06-21 20:03:45,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:45,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:45,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:45,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:45,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:45,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:45,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 395 transitions, 6168 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:45,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:45,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:45,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:46,052 INFO L124 PetriNetUnfolderBase]: 2341/3906 cut-off events. [2024-06-21 20:03:46,052 INFO L125 PetriNetUnfolderBase]: For 294730/294730 co-relation queries the response was YES. [2024-06-21 20:03:46,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30451 conditions, 3906 events. 2341/3906 cut-off events. For 294730/294730 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24136 event pairs, 465 based on Foata normal form. 1/3898 useless extension candidates. Maximal degree in co-relation 30322. Up to 3438 conditions per place. [2024-06-21 20:03:46,089 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 334 selfloop transitions, 81 changer transitions 0/422 dead transitions. [2024-06-21 20:03:46,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 422 transitions, 7087 flow [2024-06-21 20:03:46,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:46,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:03:46,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 20:03:46,090 INFO L175 Difference]: Start difference. First operand has 283 places, 395 transitions, 6168 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:03:46,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 422 transitions, 7087 flow [2024-06-21 20:03:47,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 422 transitions, 6929 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:47,269 INFO L231 Difference]: Finished difference. Result has 289 places, 398 transitions, 6213 flow [2024-06-21 20:03:47,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6013, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6213, PETRI_PLACES=289, PETRI_TRANSITIONS=398} [2024-06-21 20:03:47,269 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-21 20:03:47,269 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 398 transitions, 6213 flow [2024-06-21 20:03:47,270 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) [2024-06-21 20:03:47,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:47,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:47,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:03:47,270 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)] === [2024-06-21 20:03:47,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:47,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1386065336, now seen corresponding path program 4 times [2024-06-21 20:03:47,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:47,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382714608] [2024-06-21 20:03:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:47,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:47,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:47,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382714608] [2024-06-21 20:03:47,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382714608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:47,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:47,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:47,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287903080] [2024-06-21 20:03:47,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:47,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:47,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:47,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:47,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:47,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:47,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 398 transitions, 6213 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:47,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:47,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:47,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:48,058 INFO L124 PetriNetUnfolderBase]: 2364/3944 cut-off events. [2024-06-21 20:03:48,058 INFO L125 PetriNetUnfolderBase]: For 305585/305585 co-relation queries the response was YES. [2024-06-21 20:03:48,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30838 conditions, 3944 events. 2364/3944 cut-off events. For 305585/305585 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24430 event pairs, 476 based on Foata normal form. 1/3936 useless extension candidates. Maximal degree in co-relation 30708. Up to 3354 conditions per place. [2024-06-21 20:03:48,097 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 302 selfloop transitions, 128 changer transitions 0/437 dead transitions. [2024-06-21 20:03:48,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 437 transitions, 7737 flow [2024-06-21 20:03:48,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 20:03:48,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-21 20:03:48,099 INFO L175 Difference]: Start difference. First operand has 289 places, 398 transitions, 6213 flow. Second operand 8 states and 193 transitions. [2024-06-21 20:03:48,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 437 transitions, 7737 flow [2024-06-21 20:03:49,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 437 transitions, 7575 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:49,207 INFO L231 Difference]: Finished difference. Result has 292 places, 410 transitions, 6531 flow [2024-06-21 20:03:49,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6051, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6531, PETRI_PLACES=292, PETRI_TRANSITIONS=410} [2024-06-21 20:03:49,207 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-21 20:03:49,207 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 410 transitions, 6531 flow [2024-06-21 20:03:49,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:49,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:49,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:49,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:03:49,208 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)] === [2024-06-21 20:03:49,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:49,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1814182072, now seen corresponding path program 6 times [2024-06-21 20:03:49,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:49,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359438833] [2024-06-21 20:03:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:49,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:49,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:49,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359438833] [2024-06-21 20:03:49,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359438833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:49,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:49,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:49,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795947522] [2024-06-21 20:03:49,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:49,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:49,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:49,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:49,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:49,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:49,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 410 transitions, 6531 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) [2024-06-21 20:03:49,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:49,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:49,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:50,056 INFO L124 PetriNetUnfolderBase]: 2369/3966 cut-off events. [2024-06-21 20:03:50,056 INFO L125 PetriNetUnfolderBase]: For 317614/317631 co-relation queries the response was YES. [2024-06-21 20:03:50,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31206 conditions, 3966 events. 2369/3966 cut-off events. For 317614/317631 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24676 event pairs, 474 based on Foata normal form. 13/3972 useless extension candidates. Maximal degree in co-relation 31074. Up to 3329 conditions per place. [2024-06-21 20:03:50,092 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 295 selfloop transitions, 141 changer transitions 0/443 dead transitions. [2024-06-21 20:03:50,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 443 transitions, 7933 flow [2024-06-21 20:03:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:03:50,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-21 20:03:50,094 INFO L175 Difference]: Start difference. First operand has 292 places, 410 transitions, 6531 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:03:50,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 443 transitions, 7933 flow [2024-06-21 20:03:51,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 443 transitions, 7728 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:51,149 INFO L231 Difference]: Finished difference. Result has 297 places, 413 transitions, 6651 flow [2024-06-21 20:03:51,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6326, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6651, PETRI_PLACES=297, PETRI_TRANSITIONS=413} [2024-06-21 20:03:51,150 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 256 predicate places. [2024-06-21 20:03:51,150 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 413 transitions, 6651 flow [2024-06-21 20:03:51,150 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) [2024-06-21 20:03:51,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:51,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:51,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:03:51,151 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)] === [2024-06-21 20:03:51,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:51,151 INFO L85 PathProgramCache]: Analyzing trace with hash 284001304, now seen corresponding path program 7 times [2024-06-21 20:03:51,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:51,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030825817] [2024-06-21 20:03:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:51,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:51,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:51,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030825817] [2024-06-21 20:03:51,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030825817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:51,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:51,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:51,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138021948] [2024-06-21 20:03:51,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:51,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:51,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:51,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:51,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:51,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:51,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 413 transitions, 6651 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) [2024-06-21 20:03:51,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:51,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:51,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:51,919 INFO L124 PetriNetUnfolderBase]: 2374/3975 cut-off events. [2024-06-21 20:03:51,920 INFO L125 PetriNetUnfolderBase]: For 326728/326745 co-relation queries the response was YES. [2024-06-21 20:03:51,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31450 conditions, 3975 events. 2374/3975 cut-off events. For 326728/326745 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24772 event pairs, 474 based on Foata normal form. 13/3981 useless extension candidates. Maximal degree in co-relation 31317. Up to 3335 conditions per place. [2024-06-21 20:03:51,962 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 288 selfloop transitions, 148 changer transitions 0/443 dead transitions. [2024-06-21 20:03:51,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 443 transitions, 7915 flow [2024-06-21 20:03:51,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:03:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:03:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 20:03:51,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-21 20:03:51,976 INFO L175 Difference]: Start difference. First operand has 297 places, 413 transitions, 6651 flow. Second operand 9 states and 208 transitions. [2024-06-21 20:03:51,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 443 transitions, 7915 flow [2024-06-21 20:03:53,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 443 transitions, 7507 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:53,061 INFO L231 Difference]: Finished difference. Result has 299 places, 416 transitions, 6587 flow [2024-06-21 20:03:53,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6252, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6587, PETRI_PLACES=299, PETRI_TRANSITIONS=416} [2024-06-21 20:03:53,062 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-21 20:03:53,062 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 416 transitions, 6587 flow [2024-06-21 20:03:53,062 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) [2024-06-21 20:03:53,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:53,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:53,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:03:53,063 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)] === [2024-06-21 20:03:53,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:53,064 INFO L85 PathProgramCache]: Analyzing trace with hash 917800396, now seen corresponding path program 1 times [2024-06-21 20:03:53,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:53,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837351936] [2024-06-21 20:03:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:53,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:53,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:53,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837351936] [2024-06-21 20:03:53,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837351936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:53,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:53,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:53,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444311667] [2024-06-21 20:03:53,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:53,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:53,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:53,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:53,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:53,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:53,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 416 transitions, 6587 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:53,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:53,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:53,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:53,880 INFO L124 PetriNetUnfolderBase]: 2392/3994 cut-off events. [2024-06-21 20:03:53,880 INFO L125 PetriNetUnfolderBase]: For 333069/333069 co-relation queries the response was YES. [2024-06-21 20:03:53,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31736 conditions, 3994 events. 2392/3994 cut-off events. For 333069/333069 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 24834 event pairs, 475 based on Foata normal form. 1/3986 useless extension candidates. Maximal degree in co-relation 31602. Up to 3426 conditions per place. [2024-06-21 20:03:53,914 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 324 selfloop transitions, 118 changer transitions 0/449 dead transitions. [2024-06-21 20:03:53,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 449 transitions, 8086 flow [2024-06-21 20:03:53,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:53,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:03:53,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 20:03:53,915 INFO L175 Difference]: Start difference. First operand has 299 places, 416 transitions, 6587 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:03:53,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 449 transitions, 8086 flow [2024-06-21 20:03:55,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 449 transitions, 7830 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:55,054 INFO L231 Difference]: Finished difference. Result has 301 places, 425 transitions, 6698 flow [2024-06-21 20:03:55,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6698, PETRI_PLACES=301, PETRI_TRANSITIONS=425} [2024-06-21 20:03:55,055 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-21 20:03:55,055 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 425 transitions, 6698 flow [2024-06-21 20:03:55,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:55,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:55,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:55,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:03:55,056 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)] === [2024-06-21 20:03:55,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:55,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1376805512, now seen corresponding path program 8 times [2024-06-21 20:03:55,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:55,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531353923] [2024-06-21 20:03:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:55,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:55,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:55,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531353923] [2024-06-21 20:03:55,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531353923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:55,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:55,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:55,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648815235] [2024-06-21 20:03:55,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:55,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:55,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:55,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:55,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:55,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:55,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 425 transitions, 6698 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:55,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:55,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:55,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:55,924 INFO L124 PetriNetUnfolderBase]: 2405/4016 cut-off events. [2024-06-21 20:03:55,924 INFO L125 PetriNetUnfolderBase]: For 343752/343752 co-relation queries the response was YES. [2024-06-21 20:03:55,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31953 conditions, 4016 events. 2405/4016 cut-off events. For 343752/343752 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 25035 event pairs, 464 based on Foata normal form. 1/4008 useless extension candidates. Maximal degree in co-relation 31818. Up to 3520 conditions per place. [2024-06-21 20:03:55,971 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 364 selfloop transitions, 88 changer transitions 0/459 dead transitions. [2024-06-21 20:03:55,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 459 transitions, 7888 flow [2024-06-21 20:03:55,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:03:55,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:03:55,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-21 20:03:55,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477272727272727 [2024-06-21 20:03:55,973 INFO L175 Difference]: Start difference. First operand has 301 places, 425 transitions, 6698 flow. Second operand 11 states and 241 transitions. [2024-06-21 20:03:55,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 459 transitions, 7888 flow [2024-06-21 20:03:57,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 459 transitions, 7674 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:57,209 INFO L231 Difference]: Finished difference. Result has 310 places, 431 transitions, 6758 flow [2024-06-21 20:03:57,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6484, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6758, PETRI_PLACES=310, PETRI_TRANSITIONS=431} [2024-06-21 20:03:57,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-21 20:03:57,210 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 431 transitions, 6758 flow [2024-06-21 20:03:57,210 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) [2024-06-21 20:03:57,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:57,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:57,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:03:57,211 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)] === [2024-06-21 20:03:57,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash -379991526, now seen corresponding path program 2 times [2024-06-21 20:03:57,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:57,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806346323] [2024-06-21 20:03:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:57,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:57,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806346323] [2024-06-21 20:03:57,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806346323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:57,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:57,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:57,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830473711] [2024-06-21 20:03:57,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:57,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:57,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:57,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:57,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:57,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:57,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 431 transitions, 6758 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:57,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:57,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:57,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:58,138 INFO L124 PetriNetUnfolderBase]: 2402/4011 cut-off events. [2024-06-21 20:03:58,138 INFO L125 PetriNetUnfolderBase]: For 350348/350348 co-relation queries the response was YES. [2024-06-21 20:03:58,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31910 conditions, 4011 events. 2402/4011 cut-off events. For 350348/350348 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 24995 event pairs, 477 based on Foata normal form. 1/4003 useless extension candidates. Maximal degree in co-relation 31772. Up to 3441 conditions per place. [2024-06-21 20:03:58,181 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 329 selfloop transitions, 118 changer transitions 0/454 dead transitions. [2024-06-21 20:03:58,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 454 transitions, 8004 flow [2024-06-21 20:03:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 20:03:58,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-21 20:03:58,182 INFO L175 Difference]: Start difference. First operand has 310 places, 431 transitions, 6758 flow. Second operand 8 states and 187 transitions. [2024-06-21 20:03:58,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 454 transitions, 8004 flow [2024-06-21 20:03:59,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 454 transitions, 7808 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 20:03:59,551 INFO L231 Difference]: Finished difference. Result has 310 places, 431 transitions, 6804 flow [2024-06-21 20:03:59,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6804, PETRI_PLACES=310, PETRI_TRANSITIONS=431} [2024-06-21 20:03:59,552 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-21 20:03:59,552 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 431 transitions, 6804 flow [2024-06-21 20:03:59,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:59,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:59,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:59,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:03:59,552 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)] === [2024-06-21 20:03:59,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1376811092, now seen corresponding path program 9 times [2024-06-21 20:03:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:59,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698961322] [2024-06-21 20:03:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:59,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:59,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698961322] [2024-06-21 20:03:59,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698961322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:59,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:59,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:59,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569962912] [2024-06-21 20:03:59,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:59,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:59,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:59,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:59,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:59,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 431 transitions, 6804 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:59,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:59,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:59,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:00,486 INFO L124 PetriNetUnfolderBase]: 2399/4008 cut-off events. [2024-06-21 20:04:00,486 INFO L125 PetriNetUnfolderBase]: For 356209/356209 co-relation queries the response was YES. [2024-06-21 20:04:00,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31989 conditions, 4008 events. 2399/4008 cut-off events. For 356209/356209 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25000 event pairs, 464 based on Foata normal form. 1/4000 useless extension candidates. Maximal degree in co-relation 31850. Up to 3513 conditions per place. [2024-06-21 20:04:00,532 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 365 selfloop transitions, 88 changer transitions 0/460 dead transitions. [2024-06-21 20:04:00,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 460 transitions, 7780 flow [2024-06-21 20:04:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:04:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:04:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 276 transitions. [2024-06-21 20:04:00,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2024-06-21 20:04:00,533 INFO L175 Difference]: Start difference. First operand has 310 places, 431 transitions, 6804 flow. Second operand 13 states and 276 transitions. [2024-06-21 20:04:00,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 460 transitions, 7780 flow [2024-06-21 20:04:01,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 460 transitions, 7530 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:01,739 INFO L231 Difference]: Finished difference. Result has 316 places, 431 transitions, 6736 flow [2024-06-21 20:04:01,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6554, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6736, PETRI_PLACES=316, PETRI_TRANSITIONS=431} [2024-06-21 20:04:01,740 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-21 20:04:01,740 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 431 transitions, 6736 flow [2024-06-21 20:04:01,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:01,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:01,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:01,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:04:01,741 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)] === [2024-06-21 20:04:01,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:01,741 INFO L85 PathProgramCache]: Analyzing trace with hash 131205954, now seen corresponding path program 5 times [2024-06-21 20:04:01,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:01,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259042592] [2024-06-21 20:04:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:01,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:01,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:01,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259042592] [2024-06-21 20:04:01,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259042592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:01,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:01,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:01,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506159209] [2024-06-21 20:04:01,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:01,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:01,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:01,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:01,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:01,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:01,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 431 transitions, 6736 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:01,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:01,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:01,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:02,606 INFO L124 PetriNetUnfolderBase]: 2412/4028 cut-off events. [2024-06-21 20:04:02,606 INFO L125 PetriNetUnfolderBase]: For 367987/367987 co-relation queries the response was YES. [2024-06-21 20:04:02,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32274 conditions, 4028 events. 2412/4028 cut-off events. For 367987/367987 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25138 event pairs, 478 based on Foata normal form. 1/4020 useless extension candidates. Maximal degree in co-relation 32134. Up to 3411 conditions per place. [2024-06-21 20:04:02,652 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 316 selfloop transitions, 144 changer transitions 0/467 dead transitions. [2024-06-21 20:04:02,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 467 transitions, 8470 flow [2024-06-21 20:04:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-21 20:04:02,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-21 20:04:02,654 INFO L175 Difference]: Start difference. First operand has 316 places, 431 transitions, 6736 flow. Second operand 10 states and 233 transitions. [2024-06-21 20:04:02,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 467 transitions, 8470 flow [2024-06-21 20:04:04,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 467 transitions, 8290 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-21 20:04:04,095 INFO L231 Difference]: Finished difference. Result has 314 places, 437 transitions, 6984 flow [2024-06-21 20:04:04,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6984, PETRI_PLACES=314, PETRI_TRANSITIONS=437} [2024-06-21 20:04:04,096 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-21 20:04:04,096 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 437 transitions, 6984 flow [2024-06-21 20:04:04,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:04,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:04,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:04,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:04:04,096 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)] === [2024-06-21 20:04:04,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:04,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1376799746, now seen corresponding path program 6 times [2024-06-21 20:04:04,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:04,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336296380] [2024-06-21 20:04:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:04,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:04,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:04,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336296380] [2024-06-21 20:04:04,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336296380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:04,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:04,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:04,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196357705] [2024-06-21 20:04:04,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:04,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:04,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:04,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:04,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:04,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:04,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 437 transitions, 6984 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:04,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:04,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:04,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:04,938 INFO L124 PetriNetUnfolderBase]: 2409/4019 cut-off events. [2024-06-21 20:04:04,939 INFO L125 PetriNetUnfolderBase]: For 374178/374178 co-relation queries the response was YES. [2024-06-21 20:04:04,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32419 conditions, 4019 events. 2409/4019 cut-off events. For 374178/374178 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25002 event pairs, 478 based on Foata normal form. 1/4011 useless extension candidates. Maximal degree in co-relation 32278. Up to 3408 conditions per place. [2024-06-21 20:04:04,982 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 314 selfloop transitions, 146 changer transitions 0/467 dead transitions. [2024-06-21 20:04:04,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 467 transitions, 8438 flow [2024-06-21 20:04:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:04:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:04:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-21 20:04:04,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-06-21 20:04:04,984 INFO L175 Difference]: Start difference. First operand has 314 places, 437 transitions, 6984 flow. Second operand 11 states and 247 transitions. [2024-06-21 20:04:04,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 467 transitions, 8438 flow [2024-06-21 20:04:06,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 467 transitions, 8064 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:06,293 INFO L231 Difference]: Finished difference. Result has 318 places, 437 transitions, 6908 flow [2024-06-21 20:04:06,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6610, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6908, PETRI_PLACES=318, PETRI_TRANSITIONS=437} [2024-06-21 20:04:06,293 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-21 20:04:06,293 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 437 transitions, 6908 flow [2024-06-21 20:04:06,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:06,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:06,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:06,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:04:06,294 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)] === [2024-06-21 20:04:06,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash -173458242, now seen corresponding path program 7 times [2024-06-21 20:04:06,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:06,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944811936] [2024-06-21 20:04:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:06,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:06,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:06,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944811936] [2024-06-21 20:04:06,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944811936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:06,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:06,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:06,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914306644] [2024-06-21 20:04:06,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:06,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:06,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:06,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:06,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:06,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 437 transitions, 6908 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:06,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:06,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:06,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:07,094 INFO L124 PetriNetUnfolderBase]: 2470/4105 cut-off events. [2024-06-21 20:04:07,094 INFO L125 PetriNetUnfolderBase]: For 406824/406824 co-relation queries the response was YES. [2024-06-21 20:04:07,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33837 conditions, 4105 events. 2470/4105 cut-off events. For 406824/406824 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25561 event pairs, 518 based on Foata normal form. 1/4091 useless extension candidates. Maximal degree in co-relation 33695. Up to 3073 conditions per place. [2024-06-21 20:04:07,139 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 205 selfloop transitions, 267 changer transitions 0/479 dead transitions. [2024-06-21 20:04:07,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 479 transitions, 8972 flow [2024-06-21 20:04:07,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:04:07,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-21 20:04:07,141 INFO L175 Difference]: Start difference. First operand has 318 places, 437 transitions, 6908 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:04:07,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 479 transitions, 8972 flow [2024-06-21 20:04:08,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 479 transitions, 8660 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:04:08,670 INFO L231 Difference]: Finished difference. Result has 316 places, 457 transitions, 7580 flow [2024-06-21 20:04:08,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6608, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7580, PETRI_PLACES=316, PETRI_TRANSITIONS=457} [2024-06-21 20:04:08,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-21 20:04:08,671 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 457 transitions, 7580 flow [2024-06-21 20:04:08,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:08,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:08,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:08,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:04:08,671 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)] === [2024-06-21 20:04:08,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash -180689922, now seen corresponding path program 8 times [2024-06-21 20:04:08,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:08,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554591820] [2024-06-21 20:04:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:08,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:08,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:08,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554591820] [2024-06-21 20:04:08,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554591820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:08,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:08,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:08,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653717509] [2024-06-21 20:04:08,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:08,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:08,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:08,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:08,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:08,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:08,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 457 transitions, 7580 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:08,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:08,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:08,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:09,529 INFO L124 PetriNetUnfolderBase]: 2480/4136 cut-off events. [2024-06-21 20:04:09,529 INFO L125 PetriNetUnfolderBase]: For 418182/418182 co-relation queries the response was YES. [2024-06-21 20:04:09,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34436 conditions, 4136 events. 2480/4136 cut-off events. For 418182/418182 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 25900 event pairs, 478 based on Foata normal form. 1/4128 useless extension candidates. Maximal degree in co-relation 34293. Up to 3532 conditions per place. [2024-06-21 20:04:09,573 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 349 selfloop transitions, 131 changer transitions 0/487 dead transitions. [2024-06-21 20:04:09,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 487 transitions, 9335 flow [2024-06-21 20:04:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:09,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-21 20:04:09,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 20:04:09,574 INFO L175 Difference]: Start difference. First operand has 316 places, 457 transitions, 7580 flow. Second operand 10 states and 225 transitions. [2024-06-21 20:04:09,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 487 transitions, 9335 flow [2024-06-21 20:04:10,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 487 transitions, 8808 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:10,985 INFO L231 Difference]: Finished difference. Result has 323 places, 463 transitions, 7428 flow [2024-06-21 20:04:10,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7072, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7428, PETRI_PLACES=323, PETRI_TRANSITIONS=463} [2024-06-21 20:04:10,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-21 20:04:10,986 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 463 transitions, 7428 flow [2024-06-21 20:04:10,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:10,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:10,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:10,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:04:10,987 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)] === [2024-06-21 20:04:10,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:10,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1323596708, now seen corresponding path program 9 times [2024-06-21 20:04:10,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:10,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990323320] [2024-06-21 20:04:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:10,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:11,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:11,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990323320] [2024-06-21 20:04:11,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990323320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:11,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:11,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:11,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960237373] [2024-06-21 20:04:11,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:11,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:11,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:11,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:11,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:11,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:11,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 463 transitions, 7428 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:11,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:11,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:11,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:11,816 INFO L124 PetriNetUnfolderBase]: 2485/4130 cut-off events. [2024-06-21 20:04:11,817 INFO L125 PetriNetUnfolderBase]: For 426645/426645 co-relation queries the response was YES. [2024-06-21 20:04:11,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34042 conditions, 4130 events. 2485/4130 cut-off events. For 426645/426645 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 25801 event pairs, 518 based on Foata normal form. 1/4116 useless extension candidates. Maximal degree in co-relation 33898. Up to 3083 conditions per place. [2024-06-21 20:04:11,863 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 213 selfloop transitions, 269 changer transitions 0/489 dead transitions. [2024-06-21 20:04:11,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 489 transitions, 9296 flow [2024-06-21 20:04:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:04:11,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-21 20:04:11,864 INFO L175 Difference]: Start difference. First operand has 323 places, 463 transitions, 7428 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:04:11,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 489 transitions, 9296 flow [2024-06-21 20:04:13,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 489 transitions, 9050 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:13,470 INFO L231 Difference]: Finished difference. Result has 328 places, 466 transitions, 7776 flow [2024-06-21 20:04:13,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7182, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7776, PETRI_PLACES=328, PETRI_TRANSITIONS=466} [2024-06-21 20:04:13,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-21 20:04:13,471 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 466 transitions, 7776 flow [2024-06-21 20:04:13,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:13,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:13,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:13,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:04:13,473 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)] === [2024-06-21 20:04:13,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash -180701082, now seen corresponding path program 10 times [2024-06-21 20:04:13,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:13,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69016636] [2024-06-21 20:04:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:13,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:13,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:13,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69016636] [2024-06-21 20:04:13,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69016636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:13,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:13,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:13,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145584407] [2024-06-21 20:04:13,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:13,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:13,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:13,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:13,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:13,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 466 transitions, 7776 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:13,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:13,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:13,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:14,383 INFO L124 PetriNetUnfolderBase]: 2482/4138 cut-off events. [2024-06-21 20:04:14,384 INFO L125 PetriNetUnfolderBase]: For 434859/434859 co-relation queries the response was YES. [2024-06-21 20:04:14,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34446 conditions, 4138 events. 2482/4138 cut-off events. For 434859/434859 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 25925 event pairs, 478 based on Foata normal form. 1/4130 useless extension candidates. Maximal degree in co-relation 34301. Up to 3536 conditions per place. [2024-06-21 20:04:14,424 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 350 selfloop transitions, 130 changer transitions 0/487 dead transitions. [2024-06-21 20:04:14,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 487 transitions, 9272 flow [2024-06-21 20:04:14,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:14,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 20:04:14,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:04:14,425 INFO L175 Difference]: Start difference. First operand has 328 places, 466 transitions, 7776 flow. Second operand 8 states and 188 transitions. [2024-06-21 20:04:14,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 487 transitions, 9272 flow [2024-06-21 20:04:16,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 487 transitions, 8819 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:16,199 INFO L231 Difference]: Finished difference. Result has 333 places, 466 transitions, 7589 flow [2024-06-21 20:04:16,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7323, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7589, PETRI_PLACES=333, PETRI_TRANSITIONS=466} [2024-06-21 20:04:16,200 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-21 20:04:16,200 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 466 transitions, 7589 flow [2024-06-21 20:04:16,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:16,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:16,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:16,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:04:16,200 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)] === [2024-06-21 20:04:16,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash -180701268, now seen corresponding path program 10 times [2024-06-21 20:04:16,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:16,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827996532] [2024-06-21 20:04:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:16,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:16,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:16,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827996532] [2024-06-21 20:04:16,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827996532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:16,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:16,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:16,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111172852] [2024-06-21 20:04:16,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:16,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:16,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:16,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:16,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:16,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:16,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 466 transitions, 7589 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:16,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:16,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:16,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:17,078 INFO L124 PetriNetUnfolderBase]: 2495/4165 cut-off events. [2024-06-21 20:04:17,079 INFO L125 PetriNetUnfolderBase]: For 447090/447090 co-relation queries the response was YES. [2024-06-21 20:04:17,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34385 conditions, 4165 events. 2495/4165 cut-off events. For 447090/447090 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 26191 event pairs, 463 based on Foata normal form. 1/4157 useless extension candidates. Maximal degree in co-relation 34239. Up to 3666 conditions per place. [2024-06-21 20:04:17,124 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 413 selfloop transitions, 73 changer transitions 0/493 dead transitions. [2024-06-21 20:04:17,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 493 transitions, 8859 flow [2024-06-21 20:04:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 20:04:17,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-21 20:04:17,126 INFO L175 Difference]: Start difference. First operand has 333 places, 466 transitions, 7589 flow. Second operand 10 states and 218 transitions. [2024-06-21 20:04:17,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 493 transitions, 8859 flow [2024-06-21 20:04:19,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 493 transitions, 8599 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:19,042 INFO L231 Difference]: Finished difference. Result has 337 places, 472 transitions, 7585 flow [2024-06-21 20:04:19,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7329, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7585, PETRI_PLACES=337, PETRI_TRANSITIONS=472} [2024-06-21 20:04:19,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-21 20:04:19,043 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 472 transitions, 7585 flow [2024-06-21 20:04:19,043 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) [2024-06-21 20:04:19,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:19,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:19,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:04:19,044 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)] === [2024-06-21 20:04:19,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:19,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1327327124, now seen corresponding path program 3 times [2024-06-21 20:04:19,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:19,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269442203] [2024-06-21 20:04:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:19,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:19,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:19,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269442203] [2024-06-21 20:04:19,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269442203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:19,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:19,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:19,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168563471] [2024-06-21 20:04:19,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:19,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:19,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:19,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:19,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:19,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:19,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 472 transitions, 7585 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:19,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:19,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:19,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:19,939 INFO L124 PetriNetUnfolderBase]: 2500/4174 cut-off events. [2024-06-21 20:04:19,939 INFO L125 PetriNetUnfolderBase]: For 457015/457015 co-relation queries the response was YES. [2024-06-21 20:04:19,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34464 conditions, 4174 events. 2500/4174 cut-off events. For 457015/457015 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 26233 event pairs, 479 based on Foata normal form. 1/4166 useless extension candidates. Maximal degree in co-relation 34316. Up to 3573 conditions per place. [2024-06-21 20:04:19,980 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 366 selfloop transitions, 122 changer transitions 0/495 dead transitions. [2024-06-21 20:04:19,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 495 transitions, 8993 flow [2024-06-21 20:04:19,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:04:19,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 20:04:19,981 INFO L175 Difference]: Start difference. First operand has 337 places, 472 transitions, 7585 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:04:19,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 495 transitions, 8993 flow [2024-06-21 20:04:21,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 495 transitions, 8829 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:21,845 INFO L231 Difference]: Finished difference. Result has 338 places, 475 transitions, 7723 flow [2024-06-21 20:04:21,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7421, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7723, PETRI_PLACES=338, PETRI_TRANSITIONS=475} [2024-06-21 20:04:21,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-21 20:04:21,845 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 475 transitions, 7723 flow [2024-06-21 20:04:21,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:21,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:21,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:21,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:04:21,846 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)] === [2024-06-21 20:04:21,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:21,846 INFO L85 PathProgramCache]: Analyzing trace with hash 233811798, now seen corresponding path program 11 times [2024-06-21 20:04:21,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:21,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629189250] [2024-06-21 20:04:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:21,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:21,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:21,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629189250] [2024-06-21 20:04:21,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629189250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:21,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:21,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:21,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139399816] [2024-06-21 20:04:21,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:21,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:21,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:21,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:21,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:21,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:21,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 475 transitions, 7723 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:21,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:21,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:21,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:22,702 INFO L124 PetriNetUnfolderBase]: 2497/4172 cut-off events. [2024-06-21 20:04:22,703 INFO L125 PetriNetUnfolderBase]: For 463996/463996 co-relation queries the response was YES. [2024-06-21 20:04:22,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34584 conditions, 4172 events. 2497/4172 cut-off events. For 463996/463996 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 26256 event pairs, 463 based on Foata normal form. 1/4164 useless extension candidates. Maximal degree in co-relation 34435. Up to 3670 conditions per place. [2024-06-21 20:04:22,749 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 416 selfloop transitions, 73 changer transitions 0/496 dead transitions. [2024-06-21 20:04:22,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 496 transitions, 8751 flow [2024-06-21 20:04:22,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:04:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:04:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-21 20:04:22,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2024-06-21 20:04:22,751 INFO L175 Difference]: Start difference. First operand has 338 places, 475 transitions, 7723 flow. Second operand 11 states and 234 transitions. [2024-06-21 20:04:22,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 496 transitions, 8751 flow [2024-06-21 20:04:24,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 496 transitions, 8537 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:24,752 INFO L231 Difference]: Finished difference. Result has 344 places, 475 transitions, 7661 flow [2024-06-21 20:04:24,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7661, PETRI_PLACES=344, PETRI_TRANSITIONS=475} [2024-06-21 20:04:24,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-21 20:04:24,753 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 475 transitions, 7661 flow [2024-06-21 20:04:24,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:24,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:24,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:24,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:04:24,753 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)] === [2024-06-21 20:04:24,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:24,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1327321544, now seen corresponding path program 4 times [2024-06-21 20:04:24,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:24,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891187903] [2024-06-21 20:04:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:24,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:24,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:24,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891187903] [2024-06-21 20:04:24,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891187903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:24,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:24,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:24,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018132832] [2024-06-21 20:04:24,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:24,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:24,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:24,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:24,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:24,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 475 transitions, 7661 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:24,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:24,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:24,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:25,671 INFO L124 PetriNetUnfolderBase]: 2510/4194 cut-off events. [2024-06-21 20:04:25,671 INFO L125 PetriNetUnfolderBase]: For 478511/478511 co-relation queries the response was YES. [2024-06-21 20:04:25,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34819 conditions, 4194 events. 2510/4194 cut-off events. For 478511/478511 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 26467 event pairs, 473 based on Foata normal form. 1/4186 useless extension candidates. Maximal degree in co-relation 34668. Up to 3584 conditions per place. [2024-06-21 20:04:25,711 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 369 selfloop transitions, 128 changer transitions 0/504 dead transitions. [2024-06-21 20:04:25,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 504 transitions, 9499 flow [2024-06-21 20:04:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 20:04:25,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-21 20:04:25,712 INFO L175 Difference]: Start difference. First operand has 344 places, 475 transitions, 7661 flow. Second operand 9 states and 208 transitions. [2024-06-21 20:04:25,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 504 transitions, 9499 flow [2024-06-21 20:04:28,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 504 transitions, 9349 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 20:04:28,060 INFO L231 Difference]: Finished difference. Result has 343 places, 481 transitions, 7883 flow [2024-06-21 20:04:28,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7511, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7883, PETRI_PLACES=343, PETRI_TRANSITIONS=481} [2024-06-21 20:04:28,060 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-21 20:04:28,060 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 481 transitions, 7883 flow [2024-06-21 20:04:28,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:28,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:28,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:28,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:04:28,061 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)] === [2024-06-21 20:04:28,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:28,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1323596522, now seen corresponding path program 12 times [2024-06-21 20:04:28,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:28,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724638789] [2024-06-21 20:04:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:28,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:28,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:28,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724638789] [2024-06-21 20:04:28,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724638789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:28,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:28,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:28,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241497506] [2024-06-21 20:04:28,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:28,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:28,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:28,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:28,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:28,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:28,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 481 transitions, 7883 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:28,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:28,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:28,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:28,939 INFO L124 PetriNetUnfolderBase]: 2507/4183 cut-off events. [2024-06-21 20:04:28,939 INFO L125 PetriNetUnfolderBase]: For 486190/486190 co-relation queries the response was YES. [2024-06-21 20:04:28,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34974 conditions, 4183 events. 2507/4183 cut-off events. For 486190/486190 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26351 event pairs, 491 based on Foata normal form. 1/4169 useless extension candidates. Maximal degree in co-relation 34822. Up to 3470 conditions per place. [2024-06-21 20:04:28,987 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 317 selfloop transitions, 181 changer transitions 0/505 dead transitions. [2024-06-21 20:04:28,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 505 transitions, 9623 flow [2024-06-21 20:04:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-21 20:04:28,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-21 20:04:28,989 INFO L175 Difference]: Start difference. First operand has 343 places, 481 transitions, 7883 flow. Second operand 10 states and 226 transitions. [2024-06-21 20:04:28,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 505 transitions, 9623 flow [2024-06-21 20:04:31,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 505 transitions, 9235 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:31,171 INFO L231 Difference]: Finished difference. Result has 346 places, 481 transitions, 7863 flow [2024-06-21 20:04:31,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7495, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7863, PETRI_PLACES=346, PETRI_TRANSITIONS=481} [2024-06-21 20:04:31,172 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-21 20:04:31,172 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 481 transitions, 7863 flow [2024-06-21 20:04:31,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:31,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:31,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:31,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:04:31,173 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)] === [2024-06-21 20:04:31,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:31,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1334678588, now seen corresponding path program 11 times [2024-06-21 20:04:31,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:31,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25382949] [2024-06-21 20:04:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:31,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:31,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:31,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25382949] [2024-06-21 20:04:31,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25382949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:31,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:31,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:31,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210118983] [2024-06-21 20:04:31,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:31,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:31,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:31,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:31,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:31,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:31,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 481 transitions, 7863 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:31,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:31,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:31,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:32,138 INFO L124 PetriNetUnfolderBase]: 2504/4180 cut-off events. [2024-06-21 20:04:32,138 INFO L125 PetriNetUnfolderBase]: For 491532/491532 co-relation queries the response was YES. [2024-06-21 20:04:32,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34930 conditions, 4180 events. 2504/4180 cut-off events. For 491532/491532 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26281 event pairs, 481 based on Foata normal form. 1/4172 useless extension candidates. Maximal degree in co-relation 34778. Up to 3573 conditions per place. [2024-06-21 20:04:32,181 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 361 selfloop transitions, 133 changer transitions 0/501 dead transitions. [2024-06-21 20:04:32,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 501 transitions, 9247 flow [2024-06-21 20:04:32,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:32,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:32,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:04:32,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 20:04:32,183 INFO L175 Difference]: Start difference. First operand has 346 places, 481 transitions, 7863 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:04:32,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 501 transitions, 9247 flow [2024-06-21 20:04:34,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 501 transitions, 8855 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:34,067 INFO L231 Difference]: Finished difference. Result has 348 places, 481 transitions, 7743 flow [2024-06-21 20:04:34,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7471, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7743, PETRI_PLACES=348, PETRI_TRANSITIONS=481} [2024-06-21 20:04:34,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-21 20:04:34,067 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 481 transitions, 7743 flow [2024-06-21 20:04:34,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:34,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:34,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:34,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:04:34,068 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)] === [2024-06-21 20:04:34,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:34,068 INFO L85 PathProgramCache]: Analyzing trace with hash 461908620, now seen corresponding path program 5 times [2024-06-21 20:04:34,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:34,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51306555] [2024-06-21 20:04:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:34,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:34,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:34,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51306555] [2024-06-21 20:04:34,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51306555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:34,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:34,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:34,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662797381] [2024-06-21 20:04:34,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:34,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:34,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:34,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:34,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:34,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 481 transitions, 7743 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:34,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:34,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:34,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:34,945 INFO L124 PetriNetUnfolderBase]: 2509/4196 cut-off events. [2024-06-21 20:04:34,946 INFO L125 PetriNetUnfolderBase]: For 501743/501743 co-relation queries the response was YES. [2024-06-21 20:04:34,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34918 conditions, 4196 events. 2509/4196 cut-off events. For 501743/501743 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26508 event pairs, 479 based on Foata normal form. 1/4188 useless extension candidates. Maximal degree in co-relation 34765. Up to 3582 conditions per place. [2024-06-21 20:04:34,994 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 366 selfloop transitions, 133 changer transitions 0/506 dead transitions. [2024-06-21 20:04:34,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 506 transitions, 9364 flow [2024-06-21 20:04:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-21 20:04:34,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-21 20:04:34,996 INFO L175 Difference]: Start difference. First operand has 348 places, 481 transitions, 7743 flow. Second operand 9 states and 205 transitions. [2024-06-21 20:04:34,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 506 transitions, 9364 flow [2024-06-21 20:04:37,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 506 transitions, 9074 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:37,433 INFO L231 Difference]: Finished difference. Result has 350 places, 484 transitions, 7768 flow [2024-06-21 20:04:37,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7459, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7768, PETRI_PLACES=350, PETRI_TRANSITIONS=484} [2024-06-21 20:04:37,433 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-21 20:04:37,433 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 484 transitions, 7768 flow [2024-06-21 20:04:37,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:37,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:37,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:37,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:04:37,434 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)] === [2024-06-21 20:04:37,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:37,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1323833858, now seen corresponding path program 12 times [2024-06-21 20:04:37,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:37,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210937357] [2024-06-21 20:04:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:37,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:37,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:37,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210937357] [2024-06-21 20:04:37,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210937357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:37,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:37,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:37,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660984586] [2024-06-21 20:04:37,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:37,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:37,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:37,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:37,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 484 transitions, 7768 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:37,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:37,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:37,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:38,362 INFO L124 PetriNetUnfolderBase]: 2506/4171 cut-off events. [2024-06-21 20:04:38,362 INFO L125 PetriNetUnfolderBase]: For 508571/508571 co-relation queries the response was YES. [2024-06-21 20:04:38,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34888 conditions, 4171 events. 2506/4171 cut-off events. For 508571/508571 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26213 event pairs, 525 based on Foata normal form. 1/4157 useless extension candidates. Maximal degree in co-relation 34734. Up to 3101 conditions per place. [2024-06-21 20:04:38,402 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 217 selfloop transitions, 283 changer transitions 0/507 dead transitions. [2024-06-21 20:04:38,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 507 transitions, 9712 flow [2024-06-21 20:04:38,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:04:38,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:04:38,404 INFO L175 Difference]: Start difference. First operand has 350 places, 484 transitions, 7768 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:04:38,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 507 transitions, 9712 flow [2024-06-21 20:04:40,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 507 transitions, 9398 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:40,782 INFO L231 Difference]: Finished difference. Result has 351 places, 484 transitions, 8026 flow [2024-06-21 20:04:40,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7454, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8026, PETRI_PLACES=351, PETRI_TRANSITIONS=484} [2024-06-21 20:04:40,783 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-21 20:04:40,783 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 484 transitions, 8026 flow [2024-06-21 20:04:40,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:40,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:40,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:40,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:04:40,784 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)] === [2024-06-21 20:04:40,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:40,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1323830882, now seen corresponding path program 4 times [2024-06-21 20:04:40,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:40,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870314735] [2024-06-21 20:04:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:40,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:40,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:40,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870314735] [2024-06-21 20:04:40,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870314735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:40,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:40,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:40,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753287538] [2024-06-21 20:04:40,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:40,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:40,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:40,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:40,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:40,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:40,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 484 transitions, 8026 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:40,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:40,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:40,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:41,662 INFO L124 PetriNetUnfolderBase]: 2534/4241 cut-off events. [2024-06-21 20:04:41,663 INFO L125 PetriNetUnfolderBase]: For 548820/548820 co-relation queries the response was YES. [2024-06-21 20:04:41,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35671 conditions, 4241 events. 2534/4241 cut-off events. For 548820/548820 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 26839 event pairs, 446 based on Foata normal form. 8/4247 useless extension candidates. Maximal degree in co-relation 35516. Up to 3768 conditions per place. [2024-06-21 20:04:41,713 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 49 changer transitions 0/507 dead transitions. [2024-06-21 20:04:41,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 507 transitions, 9124 flow [2024-06-21 20:04:41,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 20:04:41,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-21 20:04:41,714 INFO L175 Difference]: Start difference. First operand has 351 places, 484 transitions, 8026 flow. Second operand 8 states and 181 transitions. [2024-06-21 20:04:41,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 507 transitions, 9124 flow [2024-06-21 20:04:44,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 507 transitions, 8506 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:44,021 INFO L231 Difference]: Finished difference. Result has 352 places, 485 transitions, 7531 flow [2024-06-21 20:04:44,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7531, PETRI_PLACES=352, PETRI_TRANSITIONS=485} [2024-06-21 20:04:44,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-21 20:04:44,021 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 485 transitions, 7531 flow [2024-06-21 20:04:44,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:44,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:44,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:44,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:04:44,022 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)] === [2024-06-21 20:04:44,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:44,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1334555642, now seen corresponding path program 5 times [2024-06-21 20:04:44,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:44,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177235582] [2024-06-21 20:04:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:44,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:44,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:44,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177235582] [2024-06-21 20:04:44,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177235582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:44,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:44,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:44,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643851563] [2024-06-21 20:04:44,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:44,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:44,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:44,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:44,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:44,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:44,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 485 transitions, 7531 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:44,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:44,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:44,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:44,974 INFO L124 PetriNetUnfolderBase]: 2562/4289 cut-off events. [2024-06-21 20:04:44,974 INFO L125 PetriNetUnfolderBase]: For 556517/556517 co-relation queries the response was YES. [2024-06-21 20:04:45,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35443 conditions, 4289 events. 2562/4289 cut-off events. For 556517/556517 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 27209 event pairs, 452 based on Foata normal form. 8/4295 useless extension candidates. Maximal degree in co-relation 35287. Up to 3812 conditions per place. [2024-06-21 20:04:45,019 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 50 changer transitions 0/508 dead transitions. [2024-06-21 20:04:45,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 508 transitions, 8633 flow [2024-06-21 20:04:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 20:04:45,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 20:04:45,021 INFO L175 Difference]: Start difference. First operand has 352 places, 485 transitions, 7531 flow. Second operand 8 states and 180 transitions. [2024-06-21 20:04:45,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 508 transitions, 8633 flow [2024-06-21 20:04:46,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 508 transitions, 8528 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:46,996 INFO L231 Difference]: Finished difference. Result has 354 places, 486 transitions, 7553 flow [2024-06-21 20:04:46,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7426, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7553, PETRI_PLACES=354, PETRI_TRANSITIONS=486} [2024-06-21 20:04:46,997 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-21 20:04:46,997 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 486 transitions, 7553 flow [2024-06-21 20:04:46,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:46,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:46,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:46,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:04:46,997 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)] === [2024-06-21 20:04:46,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:46,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1323504452, now seen corresponding path program 6 times [2024-06-21 20:04:46,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:46,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445140035] [2024-06-21 20:04:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:46,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:47,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:47,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445140035] [2024-06-21 20:04:47,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445140035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:47,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:47,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:47,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788316678] [2024-06-21 20:04:47,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:47,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:47,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:47,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:47,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 486 transitions, 7553 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:47,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:47,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:47,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:47,918 INFO L124 PetriNetUnfolderBase]: 2582/4321 cut-off events. [2024-06-21 20:04:47,919 INFO L125 PetriNetUnfolderBase]: For 560093/560093 co-relation queries the response was YES. [2024-06-21 20:04:47,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35735 conditions, 4321 events. 2582/4321 cut-off events. For 560093/560093 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27442 event pairs, 450 based on Foata normal form. 6/4325 useless extension candidates. Maximal degree in co-relation 35578. Up to 3782 conditions per place. [2024-06-21 20:04:47,973 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 453 selfloop transitions, 52 changer transitions 0/512 dead transitions. [2024-06-21 20:04:47,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 512 transitions, 8683 flow [2024-06-21 20:04:47,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 20:04:47,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-21 20:04:47,975 INFO L175 Difference]: Start difference. First operand has 354 places, 486 transitions, 7553 flow. Second operand 8 states and 183 transitions. [2024-06-21 20:04:47,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 512 transitions, 8683 flow [2024-06-21 20:04:50,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 512 transitions, 8574 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:50,519 INFO L231 Difference]: Finished difference. Result has 356 places, 487 transitions, 7576 flow [2024-06-21 20:04:50,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7444, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7576, PETRI_PLACES=356, PETRI_TRANSITIONS=487} [2024-06-21 20:04:50,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-21 20:04:50,519 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 487 transitions, 7576 flow [2024-06-21 20:04:50,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:50,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:50,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:50,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:04:50,520 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)] === [2024-06-21 20:04:50,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:50,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1334955356, now seen corresponding path program 1 times [2024-06-21 20:04:50,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:50,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478729052] [2024-06-21 20:04:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:50,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:50,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:50,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478729052] [2024-06-21 20:04:50,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478729052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:50,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:50,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:50,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858174382] [2024-06-21 20:04:50,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:50,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:50,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:50,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:50,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:50,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 487 transitions, 7576 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:50,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:50,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:50,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:51,550 INFO L124 PetriNetUnfolderBase]: 2602/4355 cut-off events. [2024-06-21 20:04:51,550 INFO L125 PetriNetUnfolderBase]: For 571353/571353 co-relation queries the response was YES. [2024-06-21 20:04:51,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35999 conditions, 4355 events. 2602/4355 cut-off events. For 571353/571353 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 27658 event pairs, 456 based on Foata normal form. 6/4359 useless extension candidates. Maximal degree in co-relation 35841. Up to 3782 conditions per place. [2024-06-21 20:04:51,600 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 454 selfloop transitions, 54 changer transitions 0/515 dead transitions. [2024-06-21 20:04:51,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 515 transitions, 8732 flow [2024-06-21 20:04:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:51,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 20:04:51,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-21 20:04:51,601 INFO L175 Difference]: Start difference. First operand has 356 places, 487 transitions, 7576 flow. Second operand 8 states and 182 transitions. [2024-06-21 20:04:51,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 515 transitions, 8732 flow [2024-06-21 20:04:54,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 515 transitions, 8614 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:54,188 INFO L231 Difference]: Finished difference. Result has 359 places, 490 transitions, 7624 flow [2024-06-21 20:04:54,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7458, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7624, PETRI_PLACES=359, PETRI_TRANSITIONS=490} [2024-06-21 20:04:54,188 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-21 20:04:54,188 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 490 transitions, 7624 flow [2024-06-21 20:04:54,189 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) [2024-06-21 20:04:54,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:54,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:54,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:04:54,189 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)] === [2024-06-21 20:04:54,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:54,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1171454536, now seen corresponding path program 13 times [2024-06-21 20:04:54,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:54,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29282580] [2024-06-21 20:04:54,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:54,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:54,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:54,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29282580] [2024-06-21 20:04:54,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29282580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:54,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:54,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:54,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188856421] [2024-06-21 20:04:54,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:54,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:54,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:54,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:54,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:54,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:54,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 490 transitions, 7624 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:54,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:54,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:54,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:55,197 INFO L124 PetriNetUnfolderBase]: 2599/4359 cut-off events. [2024-06-21 20:04:55,198 INFO L125 PetriNetUnfolderBase]: For 561660/561677 co-relation queries the response was YES. [2024-06-21 20:04:55,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36055 conditions, 4359 events. 2599/4359 cut-off events. For 561660/561677 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 27845 event pairs, 493 based on Foata normal form. 13/4365 useless extension candidates. Maximal degree in co-relation 35895. Up to 3664 conditions per place. [2024-06-21 20:04:55,255 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 350 selfloop transitions, 160 changer transitions 0/517 dead transitions. [2024-06-21 20:04:55,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 517 transitions, 8898 flow [2024-06-21 20:04:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-21 20:04:55,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 20:04:55,256 INFO L175 Difference]: Start difference. First operand has 359 places, 490 transitions, 7624 flow. Second operand 10 states and 225 transitions. [2024-06-21 20:04:55,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 517 transitions, 8898 flow [2024-06-21 20:04:57,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 517 transitions, 8824 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:57,912 INFO L231 Difference]: Finished difference. Result has 365 places, 490 transitions, 7876 flow [2024-06-21 20:04:57,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7550, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7876, PETRI_PLACES=365, PETRI_TRANSITIONS=490} [2024-06-21 20:04:57,912 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-21 20:04:57,912 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 490 transitions, 7876 flow [2024-06-21 20:04:57,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:57,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:57,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:57,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:04:57,913 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)] === [2024-06-21 20:04:57,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:57,913 INFO L85 PathProgramCache]: Analyzing trace with hash -64770464, now seen corresponding path program 6 times [2024-06-21 20:04:57,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:57,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82772714] [2024-06-21 20:04:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:57,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:58,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:58,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82772714] [2024-06-21 20:04:58,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82772714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:58,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:58,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:58,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101977120] [2024-06-21 20:04:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:58,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:58,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:58,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:58,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 490 transitions, 7876 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:58,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:58,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:58,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:58,863 INFO L124 PetriNetUnfolderBase]: 2604/4364 cut-off events. [2024-06-21 20:04:58,863 INFO L125 PetriNetUnfolderBase]: For 573867/573884 co-relation queries the response was YES. [2024-06-21 20:04:58,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36614 conditions, 4364 events. 2604/4364 cut-off events. For 573867/573884 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 27860 event pairs, 510 based on Foata normal form. 13/4370 useless extension candidates. Maximal degree in co-relation 36452. Up to 3732 conditions per place. [2024-06-21 20:04:58,912 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 375 selfloop transitions, 128 changer transitions 0/510 dead transitions. [2024-06-21 20:04:58,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 510 transitions, 9539 flow [2024-06-21 20:04:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:04:58,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 20:04:58,913 INFO L175 Difference]: Start difference. First operand has 365 places, 490 transitions, 7876 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:04:58,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 510 transitions, 9539 flow [2024-06-21 20:05:02,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 510 transitions, 9249 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:02,817 INFO L231 Difference]: Finished difference. Result has 365 places, 493 transitions, 7895 flow [2024-06-21 20:05:02,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7586, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7895, PETRI_PLACES=365, PETRI_TRANSITIONS=493} [2024-06-21 20:05:02,818 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-21 20:05:02,818 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 493 transitions, 7895 flow [2024-06-21 20:05:02,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:02,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:02,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:02,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:05:02,819 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)] === [2024-06-21 20:05:02,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:02,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1498046826, now seen corresponding path program 7 times [2024-06-21 20:05:02,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:02,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545394112] [2024-06-21 20:05:02,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:02,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:02,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:02,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545394112] [2024-06-21 20:05:02,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545394112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:02,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:02,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:02,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359416406] [2024-06-21 20:05:02,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:02,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:02,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:02,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:02,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:02,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:02,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 493 transitions, 7895 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:02,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:02,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:02,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:03,733 INFO L124 PetriNetUnfolderBase]: 2601/4364 cut-off events. [2024-06-21 20:05:03,733 INFO L125 PetriNetUnfolderBase]: For 580633/580650 co-relation queries the response was YES. [2024-06-21 20:05:03,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36517 conditions, 4364 events. 2601/4364 cut-off events. For 580633/580650 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27925 event pairs, 512 based on Foata normal form. 13/4370 useless extension candidates. Maximal degree in co-relation 36354. Up to 3729 conditions per place. [2024-06-21 20:05:03,788 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 374 selfloop transitions, 128 changer transitions 0/509 dead transitions. [2024-06-21 20:05:03,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 509 transitions, 9321 flow [2024-06-21 20:05:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 20:05:03,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-21 20:05:03,789 INFO L175 Difference]: Start difference. First operand has 365 places, 493 transitions, 7895 flow. Second operand 7 states and 162 transitions. [2024-06-21 20:05:03,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 509 transitions, 9321 flow [2024-06-21 20:05:06,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 509 transitions, 8927 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:06,461 INFO L231 Difference]: Finished difference. Result has 366 places, 493 transitions, 7763 flow [2024-06-21 20:05:06,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7501, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7763, PETRI_PLACES=366, PETRI_TRANSITIONS=493} [2024-06-21 20:05:06,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-21 20:05:06,462 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 493 transitions, 7763 flow [2024-06-21 20:05:06,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:06,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:06,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:06,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:05:06,462 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)] === [2024-06-21 20:05:06,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:06,463 INFO L85 PathProgramCache]: Analyzing trace with hash 500224502, now seen corresponding path program 13 times [2024-06-21 20:05:06,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:06,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965105845] [2024-06-21 20:05:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:06,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:06,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:06,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965105845] [2024-06-21 20:05:06,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965105845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:06,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:06,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:06,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855078] [2024-06-21 20:05:06,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:06,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:06,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:06,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:06,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:06,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 493 transitions, 7763 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:06,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:06,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:06,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:07,407 INFO L124 PetriNetUnfolderBase]: 2611/4365 cut-off events. [2024-06-21 20:05:07,408 INFO L125 PetriNetUnfolderBase]: For 592133/592133 co-relation queries the response was YES. [2024-06-21 20:05:07,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36529 conditions, 4365 events. 2611/4365 cut-off events. For 592133/592133 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27805 event pairs, 502 based on Foata normal form. 2/4358 useless extension candidates. Maximal degree in co-relation 36366. Up to 3373 conditions per place. [2024-06-21 20:05:07,461 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 275 changer transitions 0/530 dead transitions. [2024-06-21 20:05:07,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 530 transitions, 9774 flow [2024-06-21 20:05:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 20:05:07,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-21 20:05:07,462 INFO L175 Difference]: Start difference. First operand has 366 places, 493 transitions, 7763 flow. Second operand 8 states and 203 transitions. [2024-06-21 20:05:07,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 530 transitions, 9774 flow [2024-06-21 20:05:10,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 530 transitions, 9478 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:10,743 INFO L231 Difference]: Finished difference. Result has 369 places, 499 transitions, 8243 flow [2024-06-21 20:05:10,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7467, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8243, PETRI_PLACES=369, PETRI_TRANSITIONS=499} [2024-06-21 20:05:10,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-21 20:05:10,743 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 499 transitions, 8243 flow [2024-06-21 20:05:10,743 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) [2024-06-21 20:05:10,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:10,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:10,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:05:10,744 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)] === [2024-06-21 20:05:10,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:10,744 INFO L85 PathProgramCache]: Analyzing trace with hash -274428176, now seen corresponding path program 14 times [2024-06-21 20:05:10,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:10,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389227074] [2024-06-21 20:05:10,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:10,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:10,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:10,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389227074] [2024-06-21 20:05:10,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389227074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:10,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:10,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:10,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93785445] [2024-06-21 20:05:10,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:10,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:10,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:10,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:10,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:10,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:10,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 499 transitions, 8243 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:10,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:10,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:10,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:11,734 INFO L124 PetriNetUnfolderBase]: 2608/4365 cut-off events. [2024-06-21 20:05:11,734 INFO L125 PetriNetUnfolderBase]: For 596577/596577 co-relation queries the response was YES. [2024-06-21 20:05:11,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37086 conditions, 4365 events. 2608/4365 cut-off events. For 596577/596577 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27836 event pairs, 485 based on Foata normal form. 1/4357 useless extension candidates. Maximal degree in co-relation 36921. Up to 3678 conditions per place. [2024-06-21 20:05:11,792 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 361 selfloop transitions, 159 changer transitions 0/527 dead transitions. [2024-06-21 20:05:11,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 527 transitions, 9549 flow [2024-06-21 20:05:11,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:05:11,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-21 20:05:11,794 INFO L175 Difference]: Start difference. First operand has 369 places, 499 transitions, 8243 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:05:11,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 527 transitions, 9549 flow [2024-06-21 20:05:14,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 527 transitions, 8991 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:14,986 INFO L231 Difference]: Finished difference. Result has 369 places, 499 transitions, 8017 flow [2024-06-21 20:05:14,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7689, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8017, PETRI_PLACES=369, PETRI_TRANSITIONS=499} [2024-06-21 20:05:14,987 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-21 20:05:14,987 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 499 transitions, 8017 flow [2024-06-21 20:05:14,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:14,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:14,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:14,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:05:14,987 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)] === [2024-06-21 20:05:14,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1518006804, now seen corresponding path program 8 times [2024-06-21 20:05:14,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:14,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422579855] [2024-06-21 20:05:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:14,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:15,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:15,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422579855] [2024-06-21 20:05:15,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422579855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:15,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:15,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:15,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595838841] [2024-06-21 20:05:15,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:15,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:15,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:15,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:15,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:15,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:15,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 499 transitions, 8017 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:15,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:15,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:15,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:15,871 INFO L124 PetriNetUnfolderBase]: 2605/4362 cut-off events. [2024-06-21 20:05:15,871 INFO L125 PetriNetUnfolderBase]: For 579195/579195 co-relation queries the response was YES. [2024-06-21 20:05:15,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36597 conditions, 4362 events. 2605/4362 cut-off events. For 579195/579195 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27803 event pairs, 492 based on Foata normal form. 1/4354 useless extension candidates. Maximal degree in co-relation 36432. Up to 3736 conditions per place. [2024-06-21 20:05:15,925 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 378 selfloop transitions, 134 changer transitions 0/519 dead transitions. [2024-06-21 20:05:15,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 519 transitions, 9671 flow [2024-06-21 20:05:15,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:05:15,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:05:15,927 INFO L175 Difference]: Start difference. First operand has 369 places, 499 transitions, 8017 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:05:15,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 519 transitions, 9671 flow [2024-06-21 20:05:19,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 519 transitions, 9401 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:19,072 INFO L231 Difference]: Finished difference. Result has 370 places, 499 transitions, 8035 flow [2024-06-21 20:05:19,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7753, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8035, PETRI_PLACES=370, PETRI_TRANSITIONS=499} [2024-06-21 20:05:19,072 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-21 20:05:19,073 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 499 transitions, 8035 flow [2024-06-21 20:05:19,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:19,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:19,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:19,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:05:19,073 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)] === [2024-06-21 20:05:19,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1288676292, now seen corresponding path program 15 times [2024-06-21 20:05:19,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:19,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540525822] [2024-06-21 20:05:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:19,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:19,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:19,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540525822] [2024-06-21 20:05:19,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540525822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:19,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:19,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:19,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623872823] [2024-06-21 20:05:19,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:19,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:19,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:19,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:19,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 499 transitions, 8035 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:19,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:19,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:19,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:20,068 INFO L124 PetriNetUnfolderBase]: 2602/4358 cut-off events. [2024-06-21 20:05:20,069 INFO L125 PetriNetUnfolderBase]: For 574442/574442 co-relation queries the response was YES. [2024-06-21 20:05:20,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36430 conditions, 4358 events. 2602/4358 cut-off events. For 574442/574442 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27806 event pairs, 482 based on Foata normal form. 1/4350 useless extension candidates. Maximal degree in co-relation 36264. Up to 3671 conditions per place. [2024-06-21 20:05:20,126 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 362 selfloop transitions, 162 changer transitions 0/531 dead transitions. [2024-06-21 20:05:20,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 531 transitions, 9549 flow [2024-06-21 20:05:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:05:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:05:20,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-21 20:05:20,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-21 20:05:20,128 INFO L175 Difference]: Start difference. First operand has 370 places, 499 transitions, 8035 flow. Second operand 11 states and 251 transitions. [2024-06-21 20:05:20,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 531 transitions, 9549 flow [2024-06-21 20:05:23,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 531 transitions, 9198 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:23,720 INFO L231 Difference]: Finished difference. Result has 373 places, 499 transitions, 8030 flow [2024-06-21 20:05:23,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7692, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8030, PETRI_PLACES=373, PETRI_TRANSITIONS=499} [2024-06-21 20:05:23,721 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-21 20:05:23,721 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 499 transitions, 8030 flow [2024-06-21 20:05:23,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:23,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:23,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:23,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:05:23,722 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)] === [2024-06-21 20:05:23,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:23,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1288670712, now seen corresponding path program 16 times [2024-06-21 20:05:23,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:23,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262125302] [2024-06-21 20:05:23,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:23,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:23,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262125302] [2024-06-21 20:05:23,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262125302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:23,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:23,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:23,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383426817] [2024-06-21 20:05:23,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:23,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:23,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:23,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:23,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:23,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:23,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 499 transitions, 8030 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:23,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:23,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:23,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:24,714 INFO L124 PetriNetUnfolderBase]: 2599/4352 cut-off events. [2024-06-21 20:05:24,715 INFO L125 PetriNetUnfolderBase]: For 558263/558263 co-relation queries the response was YES. [2024-06-21 20:05:24,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36275 conditions, 4352 events. 2599/4352 cut-off events. For 558263/558263 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27737 event pairs, 482 based on Foata normal form. 1/4344 useless extension candidates. Maximal degree in co-relation 36111. Up to 3668 conditions per place. [2024-06-21 20:05:24,772 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 363 selfloop transitions, 162 changer transitions 0/532 dead transitions. [2024-06-21 20:05:24,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 532 transitions, 9352 flow [2024-06-21 20:05:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:05:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:05:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 288 transitions. [2024-06-21 20:05:24,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5538461538461539 [2024-06-21 20:05:24,773 INFO L175 Difference]: Start difference. First operand has 373 places, 499 transitions, 8030 flow. Second operand 13 states and 288 transitions. [2024-06-21 20:05:24,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 532 transitions, 9352 flow [2024-06-21 20:05:27,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 532 transitions, 9016 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 20:05:27,206 INFO L231 Difference]: Finished difference. Result has 377 places, 499 transitions, 8036 flow [2024-06-21 20:05:27,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7698, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8036, PETRI_PLACES=377, PETRI_TRANSITIONS=499} [2024-06-21 20:05:27,206 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-21 20:05:27,206 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 499 transitions, 8036 flow [2024-06-21 20:05:27,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:27,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:27,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:27,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:05:27,207 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)] === [2024-06-21 20:05:27,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash -265173560, now seen corresponding path program 14 times [2024-06-21 20:05:27,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:27,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837783369] [2024-06-21 20:05:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:27,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:27,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:27,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837783369] [2024-06-21 20:05:27,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837783369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:27,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:27,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:27,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524329443] [2024-06-21 20:05:27,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:27,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:27,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:27,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:27,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:27,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 499 transitions, 8036 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:27,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:27,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:27,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:28,178 INFO L124 PetriNetUnfolderBase]: 2593/4339 cut-off events. [2024-06-21 20:05:28,179 INFO L125 PetriNetUnfolderBase]: For 543029/543029 co-relation queries the response was YES. [2024-06-21 20:05:28,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35923 conditions, 4339 events. 2593/4339 cut-off events. For 543029/543029 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27668 event pairs, 502 based on Foata normal form. 2/4332 useless extension candidates. Maximal degree in co-relation 35759. Up to 3360 conditions per place. [2024-06-21 20:05:28,225 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 247 selfloop transitions, 279 changer transitions 0/533 dead transitions. [2024-06-21 20:05:28,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 533 transitions, 10120 flow [2024-06-21 20:05:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:28,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-21 20:05:28,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6175 [2024-06-21 20:05:28,227 INFO L175 Difference]: Start difference. First operand has 377 places, 499 transitions, 8036 flow. Second operand 10 states and 247 transitions. [2024-06-21 20:05:28,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 533 transitions, 10120 flow [2024-06-21 20:05:30,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 533 transitions, 9740 flow, removed 28 selfloop flow, removed 13 redundant places. [2024-06-21 20:05:30,971 INFO L231 Difference]: Finished difference. Result has 374 places, 499 transitions, 8253 flow [2024-06-21 20:05:30,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7676, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8253, PETRI_PLACES=374, PETRI_TRANSITIONS=499} [2024-06-21 20:05:30,973 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-21 20:05:30,973 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 499 transitions, 8253 flow [2024-06-21 20:05:30,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:30,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:30,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:30,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:05:30,973 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)] === [2024-06-21 20:05:30,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:30,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1223311334, now seen corresponding path program 9 times [2024-06-21 20:05:30,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:30,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056321351] [2024-06-21 20:05:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:30,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:31,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056321351] [2024-06-21 20:05:31,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056321351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:31,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:31,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:31,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973850692] [2024-06-21 20:05:31,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:31,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:31,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:31,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:31,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:31,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:31,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 499 transitions, 8253 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:31,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:31,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:31,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:31,922 INFO L124 PetriNetUnfolderBase]: 2590/4339 cut-off events. [2024-06-21 20:05:31,922 INFO L125 PetriNetUnfolderBase]: For 525255/525255 co-relation queries the response was YES. [2024-06-21 20:05:31,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35991 conditions, 4339 events. 2590/4339 cut-off events. For 525255/525255 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27673 event pairs, 498 based on Foata normal form. 1/4331 useless extension candidates. Maximal degree in co-relation 35827. Up to 3717 conditions per place. [2024-06-21 20:05:31,979 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 376 selfloop transitions, 135 changer transitions 0/518 dead transitions. [2024-06-21 20:05:31,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 518 transitions, 9697 flow [2024-06-21 20:05:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:05:31,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:05:31,980 INFO L175 Difference]: Start difference. First operand has 374 places, 499 transitions, 8253 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:05:31,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 518 transitions, 9697 flow [2024-06-21 20:05:34,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 518 transitions, 9003 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-21 20:05:34,351 INFO L231 Difference]: Finished difference. Result has 368 places, 499 transitions, 7859 flow [2024-06-21 20:05:34,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7571, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7859, PETRI_PLACES=368, PETRI_TRANSITIONS=499} [2024-06-21 20:05:34,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-21 20:05:34,351 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 499 transitions, 7859 flow [2024-06-21 20:05:34,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:34,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:34,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:34,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:05:34,352 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)] === [2024-06-21 20:05:34,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2034133796, now seen corresponding path program 15 times [2024-06-21 20:05:34,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:34,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431895493] [2024-06-21 20:05:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:34,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:34,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:34,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431895493] [2024-06-21 20:05:34,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431895493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:34,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:34,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:34,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908559377] [2024-06-21 20:05:34,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:34,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:34,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:34,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:34,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:34,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:34,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 499 transitions, 7859 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:34,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:34,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:34,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:35,303 INFO L124 PetriNetUnfolderBase]: 2584/4329 cut-off events. [2024-06-21 20:05:35,304 INFO L125 PetriNetUnfolderBase]: For 498079/498079 co-relation queries the response was YES. [2024-06-21 20:05:35,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35084 conditions, 4329 events. 2584/4329 cut-off events. For 498079/498079 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27613 event pairs, 502 based on Foata normal form. 2/4322 useless extension candidates. Maximal degree in co-relation 34922. Up to 3353 conditions per place. [2024-06-21 20:05:35,353 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 240 selfloop transitions, 286 changer transitions 0/533 dead transitions. [2024-06-21 20:05:35,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 533 transitions, 9729 flow [2024-06-21 20:05:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:05:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:05:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-21 20:05:35,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977272727272728 [2024-06-21 20:05:35,354 INFO L175 Difference]: Start difference. First operand has 368 places, 499 transitions, 7859 flow. Second operand 11 states and 263 transitions. [2024-06-21 20:05:35,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 533 transitions, 9729 flow [2024-06-21 20:05:38,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 533 transitions, 9385 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-21 20:05:38,201 INFO L231 Difference]: Finished difference. Result has 370 places, 499 transitions, 8134 flow [2024-06-21 20:05:38,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7539, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8134, PETRI_PLACES=370, PETRI_TRANSITIONS=499} [2024-06-21 20:05:38,202 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-21 20:05:38,202 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 499 transitions, 8134 flow [2024-06-21 20:05:38,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:38,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:38,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:38,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:05:38,202 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)] === [2024-06-21 20:05:38,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash 685487588, now seen corresponding path program 16 times [2024-06-21 20:05:38,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:38,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328930340] [2024-06-21 20:05:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:38,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:38,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:38,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328930340] [2024-06-21 20:05:38,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328930340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:38,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:38,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:38,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729528042] [2024-06-21 20:05:38,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:38,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:38,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:38,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:38,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:38,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 499 transitions, 8134 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:38,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:38,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:38,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:39,144 INFO L124 PetriNetUnfolderBase]: 2623/4407 cut-off events. [2024-06-21 20:05:39,144 INFO L125 PetriNetUnfolderBase]: For 492812/492818 co-relation queries the response was YES. [2024-06-21 20:05:39,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36042 conditions, 4407 events. 2623/4407 cut-off events. For 492812/492818 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 28313 event pairs, 467 based on Foata normal form. 6/4410 useless extension candidates. Maximal degree in co-relation 35882. Up to 3764 conditions per place. [2024-06-21 20:05:39,199 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 435 selfloop transitions, 105 changer transitions 0/547 dead transitions. [2024-06-21 20:05:39,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 547 transitions, 10219 flow [2024-06-21 20:05:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:05:39,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:05:39,200 INFO L175 Difference]: Start difference. First operand has 370 places, 499 transitions, 8134 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:05:39,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 547 transitions, 10219 flow [2024-06-21 20:05:41,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 547 transitions, 9561 flow, removed 16 selfloop flow, removed 14 redundant places. [2024-06-21 20:05:41,540 INFO L231 Difference]: Finished difference. Result has 364 places, 513 transitions, 8075 flow [2024-06-21 20:05:41,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7538, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8075, PETRI_PLACES=364, PETRI_TRANSITIONS=513} [2024-06-21 20:05:41,541 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-21 20:05:41,541 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 513 transitions, 8075 flow [2024-06-21 20:05:41,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:41,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:41,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:41,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:05:41,542 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)] === [2024-06-21 20:05:41,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1892048806, now seen corresponding path program 17 times [2024-06-21 20:05:41,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:41,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127426330] [2024-06-21 20:05:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:41,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:41,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:41,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127426330] [2024-06-21 20:05:41,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127426330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:41,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:41,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:41,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271373651] [2024-06-21 20:05:41,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:41,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:41,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:41,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:41,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:41,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:41,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 513 transitions, 8075 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) [2024-06-21 20:05:41,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:41,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:41,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:42,468 INFO L124 PetriNetUnfolderBase]: 2625/4410 cut-off events. [2024-06-21 20:05:42,469 INFO L125 PetriNetUnfolderBase]: For 458228/458234 co-relation queries the response was YES. [2024-06-21 20:05:42,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35319 conditions, 4410 events. 2625/4410 cut-off events. For 458228/458234 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 28300 event pairs, 468 based on Foata normal form. 6/4413 useless extension candidates. Maximal degree in co-relation 35161. Up to 3831 conditions per place. [2024-06-21 20:05:42,519 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 457 selfloop transitions, 78 changer transitions 0/542 dead transitions. [2024-06-21 20:05:42,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 542 transitions, 9509 flow [2024-06-21 20:05:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:05:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:05:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:05:42,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:05:42,520 INFO L175 Difference]: Start difference. First operand has 364 places, 513 transitions, 8075 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:05:42,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 542 transitions, 9509 flow [2024-06-21 20:05:44,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 542 transitions, 9419 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 20:05:44,237 INFO L231 Difference]: Finished difference. Result has 369 places, 519 transitions, 8325 flow [2024-06-21 20:05:44,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7987, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8325, PETRI_PLACES=369, PETRI_TRANSITIONS=519} [2024-06-21 20:05:44,237 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-21 20:05:44,237 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 519 transitions, 8325 flow [2024-06-21 20:05:44,238 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) [2024-06-21 20:05:44,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:44,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:44,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:05:44,238 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)] === [2024-06-21 20:05:44,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:44,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1892054386, now seen corresponding path program 18 times [2024-06-21 20:05:44,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:44,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950775071] [2024-06-21 20:05:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:44,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:44,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:44,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950775071] [2024-06-21 20:05:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950775071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:44,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:44,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:44,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497722636] [2024-06-21 20:05:44,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:44,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:44,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:44,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:44,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:44,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 519 transitions, 8325 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) [2024-06-21 20:05:44,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:44,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:44,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:45,171 INFO L124 PetriNetUnfolderBase]: 2619/4402 cut-off events. [2024-06-21 20:05:45,171 INFO L125 PetriNetUnfolderBase]: For 451658/451664 co-relation queries the response was YES. [2024-06-21 20:05:45,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35312 conditions, 4402 events. 2619/4402 cut-off events. For 451658/451664 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 28300 event pairs, 467 based on Foata normal form. 6/4405 useless extension candidates. Maximal degree in co-relation 35152. Up to 3825 conditions per place. [2024-06-21 20:05:45,223 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 459 selfloop transitions, 78 changer transitions 0/544 dead transitions. [2024-06-21 20:05:45,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 544 transitions, 9463 flow [2024-06-21 20:05:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:05:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:05:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 20:05:45,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-21 20:05:45,224 INFO L175 Difference]: Start difference. First operand has 369 places, 519 transitions, 8325 flow. Second operand 6 states and 158 transitions. [2024-06-21 20:05:45,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 544 transitions, 9463 flow [2024-06-21 20:05:47,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 544 transitions, 9289 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:47,271 INFO L231 Difference]: Finished difference. Result has 371 places, 519 transitions, 8321 flow [2024-06-21 20:05:47,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8151, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8321, PETRI_PLACES=371, PETRI_TRANSITIONS=519} [2024-06-21 20:05:47,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-21 20:05:47,271 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 519 transitions, 8321 flow [2024-06-21 20:05:47,271 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) [2024-06-21 20:05:47,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:47,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:47,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:05:47,272 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)] === [2024-06-21 20:05:47,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:47,272 INFO L85 PathProgramCache]: Analyzing trace with hash -338198396, now seen corresponding path program 10 times [2024-06-21 20:05:47,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:47,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733984024] [2024-06-21 20:05:47,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:47,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:47,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:47,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733984024] [2024-06-21 20:05:47,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733984024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:47,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:47,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:47,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130911087] [2024-06-21 20:05:47,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:47,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:47,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:47,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:47,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:47,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 519 transitions, 8321 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:47,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:47,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:47,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:48,240 INFO L124 PetriNetUnfolderBase]: 2613/4392 cut-off events. [2024-06-21 20:05:48,240 INFO L125 PetriNetUnfolderBase]: For 452954/452960 co-relation queries the response was YES. [2024-06-21 20:05:48,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35198 conditions, 4392 events. 2613/4392 cut-off events. For 452954/452960 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 28203 event pairs, 467 based on Foata normal form. 6/4395 useless extension candidates. Maximal degree in co-relation 35037. Up to 3835 conditions per place. [2024-06-21 20:05:48,290 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 452 selfloop transitions, 81 changer transitions 0/540 dead transitions. [2024-06-21 20:05:48,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 540 transitions, 9615 flow [2024-06-21 20:05:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:05:48,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:05:48,291 INFO L175 Difference]: Start difference. First operand has 371 places, 519 transitions, 8321 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:05:48,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 540 transitions, 9615 flow [2024-06-21 20:05:50,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 540 transitions, 9497 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:05:50,609 INFO L231 Difference]: Finished difference. Result has 375 places, 519 transitions, 8374 flow [2024-06-21 20:05:50,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8203, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8374, PETRI_PLACES=375, PETRI_TRANSITIONS=519} [2024-06-21 20:05:50,610 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-21 20:05:50,610 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 519 transitions, 8374 flow [2024-06-21 20:05:50,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:50,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:50,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:50,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:05:50,611 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)] === [2024-06-21 20:05:50,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:50,611 INFO L85 PathProgramCache]: Analyzing trace with hash 685498748, now seen corresponding path program 17 times [2024-06-21 20:05:50,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:50,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985329604] [2024-06-21 20:05:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:50,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:50,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:50,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985329604] [2024-06-21 20:05:50,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985329604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:50,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:50,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:50,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493075494] [2024-06-21 20:05:50,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:50,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:50,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:50,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:50,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:50,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 519 transitions, 8374 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:50,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:50,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:50,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:51,551 INFO L124 PetriNetUnfolderBase]: 2615/4399 cut-off events. [2024-06-21 20:05:51,551 INFO L125 PetriNetUnfolderBase]: For 458755/458761 co-relation queries the response was YES. [2024-06-21 20:05:51,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35261 conditions, 4399 events. 2615/4399 cut-off events. For 458755/458761 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 28317 event pairs, 468 based on Foata normal form. 6/4402 useless extension candidates. Maximal degree in co-relation 35099. Up to 3761 conditions per place. [2024-06-21 20:05:51,605 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 433 selfloop transitions, 106 changer transitions 0/546 dead transitions. [2024-06-21 20:05:51,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 546 transitions, 9953 flow [2024-06-21 20:05:51,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:05:51,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:05:51,607 INFO L175 Difference]: Start difference. First operand has 375 places, 519 transitions, 8374 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:05:51,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 546 transitions, 9953 flow [2024-06-21 20:05:53,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 546 transitions, 9725 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:53,707 INFO L231 Difference]: Finished difference. Result has 376 places, 522 transitions, 8442 flow [2024-06-21 20:05:53,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8156, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8442, PETRI_PLACES=376, PETRI_TRANSITIONS=522} [2024-06-21 20:05:53,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-21 20:05:53,708 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 522 transitions, 8442 flow [2024-06-21 20:05:53,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:53,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:53,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:53,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:05:53,708 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)] === [2024-06-21 20:05:53,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash 693260714, now seen corresponding path program 11 times [2024-06-21 20:05:53,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:53,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317212730] [2024-06-21 20:05:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:53,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:53,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:53,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317212730] [2024-06-21 20:05:53,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317212730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:53,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:53,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:53,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804515921] [2024-06-21 20:05:53,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:53,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:53,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:53,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:53,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:53,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:53,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 522 transitions, 8442 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:53,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:53,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:53,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:54,691 INFO L124 PetriNetUnfolderBase]: 2612/4393 cut-off events. [2024-06-21 20:05:54,691 INFO L125 PetriNetUnfolderBase]: For 459845/459851 co-relation queries the response was YES. [2024-06-21 20:05:54,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35274 conditions, 4393 events. 2612/4393 cut-off events. For 459845/459851 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 28225 event pairs, 467 based on Foata normal form. 5/4395 useless extension candidates. Maximal degree in co-relation 35111. Up to 3835 conditions per place. [2024-06-21 20:05:54,742 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 455 selfloop transitions, 80 changer transitions 0/542 dead transitions. [2024-06-21 20:05:54,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 542 transitions, 9562 flow [2024-06-21 20:05:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:05:54,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-21 20:05:54,743 INFO L175 Difference]: Start difference. First operand has 376 places, 522 transitions, 8442 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:05:54,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 542 transitions, 9562 flow [2024-06-21 20:05:57,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 542 transitions, 9356 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:57,148 INFO L231 Difference]: Finished difference. Result has 379 places, 522 transitions, 8402 flow [2024-06-21 20:05:57,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8236, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8402, PETRI_PLACES=379, PETRI_TRANSITIONS=522} [2024-06-21 20:05:57,148 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-21 20:05:57,149 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 522 transitions, 8402 flow [2024-06-21 20:05:57,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:57,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:57,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:57,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:05:57,149 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)] === [2024-06-21 20:05:57,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:57,150 INFO L85 PathProgramCache]: Analyzing trace with hash -237657538, now seen corresponding path program 18 times [2024-06-21 20:05:57,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:57,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760258365] [2024-06-21 20:05:57,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:57,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:57,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:57,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760258365] [2024-06-21 20:05:57,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760258365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:57,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:57,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:57,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855572820] [2024-06-21 20:05:57,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:57,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:57,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:57,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:57,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:57,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:57,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 522 transitions, 8402 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:57,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:57,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:57,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:58,118 INFO L124 PetriNetUnfolderBase]: 2641/4441 cut-off events. [2024-06-21 20:05:58,118 INFO L125 PetriNetUnfolderBase]: For 472378/472384 co-relation queries the response was YES. [2024-06-21 20:05:58,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35817 conditions, 4441 events. 2641/4441 cut-off events. For 472378/472384 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 28581 event pairs, 467 based on Foata normal form. 5/4443 useless extension candidates. Maximal degree in co-relation 35654. Up to 3634 conditions per place. [2024-06-21 20:05:58,173 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 379 selfloop transitions, 173 changer transitions 0/559 dead transitions. [2024-06-21 20:05:58,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 559 transitions, 10548 flow [2024-06-21 20:05:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:05:58,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-21 20:05:58,175 INFO L175 Difference]: Start difference. First operand has 379 places, 522 transitions, 8402 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:05:58,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 559 transitions, 10548 flow [2024-06-21 20:06:00,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 559 transitions, 10278 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:00,066 INFO L231 Difference]: Finished difference. Result has 381 places, 534 transitions, 8860 flow [2024-06-21 20:06:00,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8140, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8860, PETRI_PLACES=381, PETRI_TRANSITIONS=534} [2024-06-21 20:06:00,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-21 20:06:00,067 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 534 transitions, 8860 flow [2024-06-21 20:06:00,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:00,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:00,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:00,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:06:00,068 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)] === [2024-06-21 20:06:00,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:00,068 INFO L85 PathProgramCache]: Analyzing trace with hash -244687408, now seen corresponding path program 19 times [2024-06-21 20:06:00,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:00,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280981341] [2024-06-21 20:06:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:00,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:00,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:00,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280981341] [2024-06-21 20:06:00,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280981341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:00,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:00,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:00,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181780368] [2024-06-21 20:06:00,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:00,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:00,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:00,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:00,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:00,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:00,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 534 transitions, 8860 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:00,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:00,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:00,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:01,037 INFO L124 PetriNetUnfolderBase]: 2651/4459 cut-off events. [2024-06-21 20:06:01,037 INFO L125 PetriNetUnfolderBase]: For 475056/475062 co-relation queries the response was YES. [2024-06-21 20:06:01,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36214 conditions, 4459 events. 2651/4459 cut-off events. For 475056/475062 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 28708 event pairs, 467 based on Foata normal form. 5/4461 useless extension candidates. Maximal degree in co-relation 36050. Up to 3883 conditions per place. [2024-06-21 20:06:01,089 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 466 selfloop transitions, 88 changer transitions 0/561 dead transitions. [2024-06-21 20:06:01,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 561 transitions, 10142 flow [2024-06-21 20:06:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:06:01,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 20:06:01,090 INFO L175 Difference]: Start difference. First operand has 381 places, 534 transitions, 8860 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:06:01,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 561 transitions, 10142 flow [2024-06-21 20:06:03,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 561 transitions, 9596 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:03,241 INFO L231 Difference]: Finished difference. Result has 384 places, 540 transitions, 8624 flow [2024-06-21 20:06:03,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8341, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8624, PETRI_PLACES=384, PETRI_TRANSITIONS=540} [2024-06-21 20:06:03,241 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-21 20:06:03,241 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 540 transitions, 8624 flow [2024-06-21 20:06:03,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:03,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:03,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:03,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:06:03,242 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)] === [2024-06-21 20:06:03,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:03,242 INFO L85 PathProgramCache]: Analyzing trace with hash -244894984, now seen corresponding path program 19 times [2024-06-21 20:06:03,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:03,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295795376] [2024-06-21 20:06:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:03,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:03,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:03,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295795376] [2024-06-21 20:06:03,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295795376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:03,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:03,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:03,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74305726] [2024-06-21 20:06:03,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:03,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:03,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:03,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:03,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 540 transitions, 8624 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) [2024-06-21 20:06:03,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:03,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:03,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:04,220 INFO L124 PetriNetUnfolderBase]: 2653/4464 cut-off events. [2024-06-21 20:06:04,221 INFO L125 PetriNetUnfolderBase]: For 480720/480726 co-relation queries the response was YES. [2024-06-21 20:06:04,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35910 conditions, 4464 events. 2653/4464 cut-off events. For 480720/480726 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 28845 event pairs, 467 based on Foata normal form. 6/4467 useless extension candidates. Maximal degree in co-relation 35745. Up to 3796 conditions per place. [2024-06-21 20:06:04,274 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 444 selfloop transitions, 126 changer transitions 0/577 dead transitions. [2024-06-21 20:06:04,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 577 transitions, 10091 flow [2024-06-21 20:06:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 20:06:04,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-06-21 20:06:04,275 INFO L175 Difference]: Start difference. First operand has 384 places, 540 transitions, 8624 flow. Second operand 8 states and 205 transitions. [2024-06-21 20:06:04,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 577 transitions, 10091 flow [2024-06-21 20:06:06,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 577 transitions, 9885 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:06,862 INFO L231 Difference]: Finished difference. Result has 387 places, 543 transitions, 8755 flow [2024-06-21 20:06:06,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8418, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8755, PETRI_PLACES=387, PETRI_TRANSITIONS=543} [2024-06-21 20:06:06,863 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-21 20:06:06,863 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 543 transitions, 8755 flow [2024-06-21 20:06:06,863 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) [2024-06-21 20:06:06,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:06,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:06,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:06:06,863 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)] === [2024-06-21 20:06:06,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash -244889218, now seen corresponding path program 20 times [2024-06-21 20:06:06,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:06,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450517569] [2024-06-21 20:06:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:06,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:06,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:06,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450517569] [2024-06-21 20:06:06,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450517569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:06,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:06,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:06,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929733808] [2024-06-21 20:06:06,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:06,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:06,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:06,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:06,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:07,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:07,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 543 transitions, 8755 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:07,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:07,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:07,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:07,833 INFO L124 PetriNetUnfolderBase]: 2650/4460 cut-off events. [2024-06-21 20:06:07,834 INFO L125 PetriNetUnfolderBase]: For 481787/481793 co-relation queries the response was YES. [2024-06-21 20:06:07,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36039 conditions, 4460 events. 2650/4460 cut-off events. For 481787/481793 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 28796 event pairs, 468 based on Foata normal form. 5/4462 useless extension candidates. Maximal degree in co-relation 35873. Up to 3860 conditions per place. [2024-06-21 20:06:07,887 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 462 selfloop transitions, 104 changer transitions 0/573 dead transitions. [2024-06-21 20:06:07,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 573 transitions, 10145 flow [2024-06-21 20:06:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:06:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:06:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 20:06:07,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2024-06-21 20:06:07,889 INFO L175 Difference]: Start difference. First operand has 387 places, 543 transitions, 8755 flow. Second operand 10 states and 231 transitions. [2024-06-21 20:06:07,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 573 transitions, 10145 flow [2024-06-21 20:06:10,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 573 transitions, 9869 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:10,085 INFO L231 Difference]: Finished difference. Result has 390 places, 543 transitions, 8697 flow [2024-06-21 20:06:10,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8483, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8697, PETRI_PLACES=390, PETRI_TRANSITIONS=543} [2024-06-21 20:06:10,085 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-21 20:06:10,086 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 543 transitions, 8697 flow [2024-06-21 20:06:10,086 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) [2024-06-21 20:06:10,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:10,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:10,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:06:10,088 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)] === [2024-06-21 20:06:10,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:10,088 INFO L85 PathProgramCache]: Analyzing trace with hash -244900564, now seen corresponding path program 20 times [2024-06-21 20:06:10,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:10,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340707899] [2024-06-21 20:06:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:10,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:10,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:10,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340707899] [2024-06-21 20:06:10,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340707899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:10,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:10,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:10,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694801209] [2024-06-21 20:06:10,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:10,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:10,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:10,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:10,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:10,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:10,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 543 transitions, 8697 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) [2024-06-21 20:06:10,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:10,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:10,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:11,059 INFO L124 PetriNetUnfolderBase]: 2644/4452 cut-off events. [2024-06-21 20:06:11,060 INFO L125 PetriNetUnfolderBase]: For 467227/467233 co-relation queries the response was YES. [2024-06-21 20:06:11,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35544 conditions, 4452 events. 2644/4452 cut-off events. For 467227/467233 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 28769 event pairs, 468 based on Foata normal form. 6/4455 useless extension candidates. Maximal degree in co-relation 35379. Up to 3786 conditions per place. [2024-06-21 20:06:11,114 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 444 selfloop transitions, 117 changer transitions 0/568 dead transitions. [2024-06-21 20:06:11,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 568 transitions, 9883 flow [2024-06-21 20:06:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:06:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:06:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 20:06:11,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-21 20:06:11,115 INFO L175 Difference]: Start difference. First operand has 390 places, 543 transitions, 8697 flow. Second operand 6 states and 158 transitions. [2024-06-21 20:06:11,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 568 transitions, 9883 flow [2024-06-21 20:06:13,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 568 transitions, 9584 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 20:06:13,793 INFO L231 Difference]: Finished difference. Result has 387 places, 543 transitions, 8658 flow [2024-06-21 20:06:13,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8658, PETRI_PLACES=387, PETRI_TRANSITIONS=543} [2024-06-21 20:06:13,793 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-21 20:06:13,793 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 543 transitions, 8658 flow [2024-06-21 20:06:13,794 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) [2024-06-21 20:06:13,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:13,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:13,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:06:13,794 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)] === [2024-06-21 20:06:13,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:13,794 INFO L85 PathProgramCache]: Analyzing trace with hash -248619448, now seen corresponding path program 21 times [2024-06-21 20:06:13,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:13,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742052147] [2024-06-21 20:06:13,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:13,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742052147] [2024-06-21 20:06:13,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742052147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:13,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:13,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683963211] [2024-06-21 20:06:13,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:13,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:13,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:13,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:13,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:13,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:13,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 543 transitions, 8658 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:13,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:13,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:13,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:14,785 INFO L124 PetriNetUnfolderBase]: 2649/4459 cut-off events. [2024-06-21 20:06:14,785 INFO L125 PetriNetUnfolderBase]: For 474256/474262 co-relation queries the response was YES. [2024-06-21 20:06:14,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35748 conditions, 4459 events. 2649/4459 cut-off events. For 474256/474262 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28813 event pairs, 467 based on Foata normal form. 5/4461 useless extension candidates. Maximal degree in co-relation 35582. Up to 3641 conditions per place. [2024-06-21 20:06:14,842 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 379 selfloop transitions, 193 changer transitions 0/579 dead transitions. [2024-06-21 20:06:14,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 579 transitions, 10488 flow [2024-06-21 20:06:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 20:06:14,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-21 20:06:14,843 INFO L175 Difference]: Start difference. First operand has 387 places, 543 transitions, 8658 flow. Second operand 8 states and 203 transitions. [2024-06-21 20:06:14,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 579 transitions, 10488 flow [2024-06-21 20:06:17,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 579 transitions, 10218 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:17,190 INFO L231 Difference]: Finished difference. Result has 388 places, 546 transitions, 8844 flow [2024-06-21 20:06:17,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8400, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8844, PETRI_PLACES=388, PETRI_TRANSITIONS=546} [2024-06-21 20:06:17,190 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-21 20:06:17,191 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 546 transitions, 8844 flow [2024-06-21 20:06:17,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:17,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:17,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:17,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:06:17,191 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)] === [2024-06-21 20:06:17,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash -859690224, now seen corresponding path program 22 times [2024-06-21 20:06:17,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:17,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626102852] [2024-06-21 20:06:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:17,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:17,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:17,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626102852] [2024-06-21 20:06:17,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626102852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:17,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:17,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:17,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824537745] [2024-06-21 20:06:17,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:17,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:17,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:17,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:17,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:17,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 546 transitions, 8844 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:17,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:17,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:17,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:18,145 INFO L124 PetriNetUnfolderBase]: 2646/4455 cut-off events. [2024-06-21 20:06:18,145 INFO L125 PetriNetUnfolderBase]: For 460632/460638 co-relation queries the response was YES. [2024-06-21 20:06:18,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35678 conditions, 4455 events. 2646/4455 cut-off events. For 460632/460638 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28740 event pairs, 467 based on Foata normal form. 5/4457 useless extension candidates. Maximal degree in co-relation 35513. Up to 3856 conditions per place. [2024-06-21 20:06:18,199 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 463 selfloop transitions, 103 changer transitions 0/573 dead transitions. [2024-06-21 20:06:18,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 573 transitions, 10044 flow [2024-06-21 20:06:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:06:18,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-21 20:06:18,200 INFO L175 Difference]: Start difference. First operand has 388 places, 546 transitions, 8844 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:06:18,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 573 transitions, 10044 flow [2024-06-21 20:06:20,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 573 transitions, 9430 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:20,219 INFO L231 Difference]: Finished difference. Result has 389 places, 546 transitions, 8442 flow [2024-06-21 20:06:20,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8230, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8442, PETRI_PLACES=389, PETRI_TRANSITIONS=546} [2024-06-21 20:06:20,220 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-21 20:06:20,220 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 546 transitions, 8442 flow [2024-06-21 20:06:20,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:20,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:20,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:20,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:06:20,220 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)] === [2024-06-21 20:06:20,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash -248619634, now seen corresponding path program 21 times [2024-06-21 20:06:20,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:20,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602908110] [2024-06-21 20:06:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:20,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:20,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:20,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602908110] [2024-06-21 20:06:20,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602908110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:20,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:20,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:20,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843176186] [2024-06-21 20:06:20,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:20,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:20,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:20,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:20,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:20,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:20,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 546 transitions, 8442 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) [2024-06-21 20:06:20,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:20,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:20,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:21,158 INFO L124 PetriNetUnfolderBase]: 2640/4447 cut-off events. [2024-06-21 20:06:21,159 INFO L125 PetriNetUnfolderBase]: For 462888/462894 co-relation queries the response was YES. [2024-06-21 20:06:21,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35123 conditions, 4447 events. 2640/4447 cut-off events. For 462888/462894 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28712 event pairs, 467 based on Foata normal form. 6/4450 useless extension candidates. Maximal degree in co-relation 34957. Up to 3751 conditions per place. [2024-06-21 20:06:21,214 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 439 selfloop transitions, 129 changer transitions 0/575 dead transitions. [2024-06-21 20:06:21,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 575 transitions, 9652 flow [2024-06-21 20:06:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:06:21,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-21 20:06:21,215 INFO L175 Difference]: Start difference. First operand has 389 places, 546 transitions, 8442 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:06:21,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 575 transitions, 9652 flow [2024-06-21 20:06:23,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 575 transitions, 9382 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 20:06:23,185 INFO L231 Difference]: Finished difference. Result has 388 places, 546 transitions, 8444 flow [2024-06-21 20:06:23,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8172, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8444, PETRI_PLACES=388, PETRI_TRANSITIONS=546} [2024-06-21 20:06:23,185 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-21 20:06:23,185 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 546 transitions, 8444 flow [2024-06-21 20:06:23,186 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) [2024-06-21 20:06:23,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:23,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:23,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:06:23,186 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)] === [2024-06-21 20:06:23,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash -863172144, now seen corresponding path program 23 times [2024-06-21 20:06:23,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:23,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362352183] [2024-06-21 20:06:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:23,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:23,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362352183] [2024-06-21 20:06:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362352183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:23,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:23,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:23,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288232032] [2024-06-21 20:06:23,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:23,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:23,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:23,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:23,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:23,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:23,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 546 transitions, 8444 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:23,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:23,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:23,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:24,178 INFO L124 PetriNetUnfolderBase]: 2637/4443 cut-off events. [2024-06-21 20:06:24,178 INFO L125 PetriNetUnfolderBase]: For 463664/463670 co-relation queries the response was YES. [2024-06-21 20:06:24,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35178 conditions, 4443 events. 2637/4443 cut-off events. For 463664/463670 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28670 event pairs, 467 based on Foata normal form. 5/4445 useless extension candidates. Maximal degree in co-relation 35011. Up to 3632 conditions per place. [2024-06-21 20:06:24,224 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 376 selfloop transitions, 192 changer transitions 0/575 dead transitions. [2024-06-21 20:06:24,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 575 transitions, 10024 flow [2024-06-21 20:06:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:06:24,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-21 20:06:24,225 INFO L175 Difference]: Start difference. First operand has 388 places, 546 transitions, 8444 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:06:24,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 575 transitions, 10024 flow [2024-06-21 20:06:26,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 575 transitions, 9638 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:26,393 INFO L231 Difference]: Finished difference. Result has 389 places, 546 transitions, 8452 flow [2024-06-21 20:06:26,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8062, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8452, PETRI_PLACES=389, PETRI_TRANSITIONS=546} [2024-06-21 20:06:26,393 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-21 20:06:26,393 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 546 transitions, 8452 flow [2024-06-21 20:06:26,393 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) [2024-06-21 20:06:26,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:26,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:26,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:06:26,394 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)] === [2024-06-21 20:06:26,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:26,394 INFO L85 PathProgramCache]: Analyzing trace with hash -863175120, now seen corresponding path program 7 times [2024-06-21 20:06:26,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:26,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911171372] [2024-06-21 20:06:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:26,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:26,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:26,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911171372] [2024-06-21 20:06:26,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911171372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:26,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:26,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:26,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659856462] [2024-06-21 20:06:26,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:26,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:26,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:26,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:26,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 546 transitions, 8452 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:26,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:26,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:26,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:27,383 INFO L124 PetriNetUnfolderBase]: 2665/4490 cut-off events. [2024-06-21 20:06:27,383 INFO L125 PetriNetUnfolderBase]: For 493466/493466 co-relation queries the response was YES. [2024-06-21 20:06:27,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35554 conditions, 4490 events. 2665/4490 cut-off events. For 493466/493466 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 29017 event pairs, 467 based on Foata normal form. 8/4496 useless extension candidates. Maximal degree in co-relation 35387. Up to 3994 conditions per place. [2024-06-21 20:06:27,444 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 532 selfloop transitions, 35 changer transitions 0/574 dead transitions. [2024-06-21 20:06:27,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 574 transitions, 9704 flow [2024-06-21 20:06:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:27,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:06:27,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-21 20:06:27,445 INFO L175 Difference]: Start difference. First operand has 389 places, 546 transitions, 8452 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:06:27,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 574 transitions, 9704 flow [2024-06-21 20:06:29,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 574 transitions, 9270 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:06:29,685 INFO L231 Difference]: Finished difference. Result has 388 places, 547 transitions, 8119 flow [2024-06-21 20:06:29,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8018, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8119, PETRI_PLACES=388, PETRI_TRANSITIONS=547} [2024-06-21 20:06:29,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-21 20:06:29,685 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 547 transitions, 8119 flow [2024-06-21 20:06:29,685 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) [2024-06-21 20:06:29,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:29,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:29,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:06:29,686 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)] === [2024-06-21 20:06:29,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:29,686 INFO L85 PathProgramCache]: Analyzing trace with hash -248711704, now seen corresponding path program 8 times [2024-06-21 20:06:29,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:29,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384381765] [2024-06-21 20:06:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:29,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:29,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384381765] [2024-06-21 20:06:29,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384381765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:29,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:29,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:29,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128359598] [2024-06-21 20:06:29,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:29,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:29,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:29,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:29,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:29,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 547 transitions, 8119 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:29,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:29,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:29,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:30,708 INFO L124 PetriNetUnfolderBase]: 2685/4522 cut-off events. [2024-06-21 20:06:30,708 INFO L125 PetriNetUnfolderBase]: For 493018/493018 co-relation queries the response was YES. [2024-06-21 20:06:30,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35454 conditions, 4522 events. 2685/4522 cut-off events. For 493018/493018 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29222 event pairs, 389 based on Foata normal form. 6/4526 useless extension candidates. Maximal degree in co-relation 35286. Up to 3884 conditions per place. [2024-06-21 20:06:30,759 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 534 selfloop transitions, 41 changer transitions 0/582 dead transitions. [2024-06-21 20:06:30,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 582 transitions, 9605 flow [2024-06-21 20:06:30,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:06:30,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:06:30,760 INFO L175 Difference]: Start difference. First operand has 388 places, 547 transitions, 8119 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:06:30,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 582 transitions, 9605 flow [2024-06-21 20:06:33,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 582 transitions, 9522 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:33,582 INFO L231 Difference]: Finished difference. Result has 390 places, 548 transitions, 8148 flow [2024-06-21 20:06:33,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8036, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8148, PETRI_PLACES=390, PETRI_TRANSITIONS=548} [2024-06-21 20:06:33,582 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-21 20:06:33,582 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 548 transitions, 8148 flow [2024-06-21 20:06:33,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:33,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:33,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:33,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:06:33,583 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)] === [2024-06-21 20:06:33,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:33,583 INFO L85 PathProgramCache]: Analyzing trace with hash -815582308, now seen corresponding path program 9 times [2024-06-21 20:06:33,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:33,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291046864] [2024-06-21 20:06:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:33,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:33,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:33,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291046864] [2024-06-21 20:06:33,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291046864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:33,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:33,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:33,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453979471] [2024-06-21 20:06:33,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:33,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:33,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:33,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:33,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:33,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:33,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 548 transitions, 8148 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:33,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:33,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:33,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:34,572 INFO L124 PetriNetUnfolderBase]: 2667/4496 cut-off events. [2024-06-21 20:06:34,572 INFO L125 PetriNetUnfolderBase]: For 475494/475494 co-relation queries the response was YES. [2024-06-21 20:06:34,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34568 conditions, 4496 events. 2667/4496 cut-off events. For 475494/475494 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29085 event pairs, 463 based on Foata normal form. 8/4502 useless extension candidates. Maximal degree in co-relation 34399. Up to 4000 conditions per place. [2024-06-21 20:06:34,626 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 529 selfloop transitions, 33 changer transitions 0/569 dead transitions. [2024-06-21 20:06:34,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 569 transitions, 9350 flow [2024-06-21 20:06:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 20:06:34,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:06:34,627 INFO L175 Difference]: Start difference. First operand has 390 places, 548 transitions, 8148 flow. Second operand 7 states and 161 transitions. [2024-06-21 20:06:34,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 569 transitions, 9350 flow [2024-06-21 20:06:37,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 569 transitions, 9225 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:37,381 INFO L231 Difference]: Finished difference. Result has 392 places, 548 transitions, 8094 flow [2024-06-21 20:06:37,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8023, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8094, PETRI_PLACES=392, PETRI_TRANSITIONS=548} [2024-06-21 20:06:37,381 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-21 20:06:37,381 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 548 transitions, 8094 flow [2024-06-21 20:06:37,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:37,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:37,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:37,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:06:37,382 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)] === [2024-06-21 20:06:37,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:37,382 INFO L85 PathProgramCache]: Analyzing trace with hash -887571202, now seen corresponding path program 2 times [2024-06-21 20:06:37,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:37,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554017143] [2024-06-21 20:06:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:37,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:37,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:37,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554017143] [2024-06-21 20:06:37,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554017143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:37,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:37,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:37,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991480524] [2024-06-21 20:06:37,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:37,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:37,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:37,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:37,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:37,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:37,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 548 transitions, 8094 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:37,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:37,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:37,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:38,366 INFO L124 PetriNetUnfolderBase]: 2687/4532 cut-off events. [2024-06-21 20:06:38,366 INFO L125 PetriNetUnfolderBase]: For 473589/473589 co-relation queries the response was YES. [2024-06-21 20:06:38,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34572 conditions, 4532 events. 2687/4532 cut-off events. For 473589/473589 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 29319 event pairs, 381 based on Foata normal form. 6/4536 useless extension candidates. Maximal degree in co-relation 34402. Up to 3975 conditions per place. [2024-06-21 20:06:38,420 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 539 selfloop transitions, 31 changer transitions 0/577 dead transitions. [2024-06-21 20:06:38,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 577 transitions, 9387 flow [2024-06-21 20:06:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:06:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:06:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 20:06:38,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-21 20:06:38,422 INFO L175 Difference]: Start difference. First operand has 392 places, 548 transitions, 8094 flow. Second operand 6 states and 149 transitions. [2024-06-21 20:06:38,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 577 transitions, 9387 flow [2024-06-21 20:06:41,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 577 transitions, 9301 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:06:41,355 INFO L231 Difference]: Finished difference. Result has 393 places, 551 transitions, 8137 flow [2024-06-21 20:06:41,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8008, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8137, PETRI_PLACES=393, PETRI_TRANSITIONS=551} [2024-06-21 20:06:41,356 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 352 predicate places. [2024-06-21 20:06:41,356 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 551 transitions, 8137 flow [2024-06-21 20:06:41,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:41,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:41,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:41,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:06:41,357 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)] === [2024-06-21 20:06:41,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:41,357 INFO L85 PathProgramCache]: Analyzing trace with hash -872839072, now seen corresponding path program 3 times [2024-06-21 20:06:41,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:41,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502930873] [2024-06-21 20:06:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:41,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:41,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:41,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502930873] [2024-06-21 20:06:41,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502930873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:41,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:41,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:41,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154614315] [2024-06-21 20:06:41,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:41,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:41,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:41,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:41,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:41,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:41,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 551 transitions, 8137 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:41,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:41,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:41,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:42,354 INFO L124 PetriNetUnfolderBase]: 2707/4568 cut-off events. [2024-06-21 20:06:42,355 INFO L125 PetriNetUnfolderBase]: For 483302/483302 co-relation queries the response was YES. [2024-06-21 20:06:42,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34913 conditions, 4568 events. 2707/4568 cut-off events. For 483302/483302 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 29653 event pairs, 385 based on Foata normal form. 6/4572 useless extension candidates. Maximal degree in co-relation 34741. Up to 3969 conditions per place. [2024-06-21 20:06:42,411 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 542 selfloop transitions, 35 changer transitions 0/584 dead transitions. [2024-06-21 20:06:42,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 584 transitions, 9476 flow [2024-06-21 20:06:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:06:42,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:06:42,413 INFO L175 Difference]: Start difference. First operand has 393 places, 551 transitions, 8137 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:06:42,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 584 transitions, 9476 flow [2024-06-21 20:06:45,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 584 transitions, 9432 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 20:06:45,184 INFO L231 Difference]: Finished difference. Result has 400 places, 556 transitions, 8266 flow [2024-06-21 20:06:45,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8093, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8266, PETRI_PLACES=400, PETRI_TRANSITIONS=556} [2024-06-21 20:06:45,184 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-21 20:06:45,184 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 556 transitions, 8266 flow [2024-06-21 20:06:45,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:45,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:45,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:45,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:06:45,185 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)] === [2024-06-21 20:06:45,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:45,185 INFO L85 PathProgramCache]: Analyzing trace with hash -815182594, now seen corresponding path program 4 times [2024-06-21 20:06:45,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:45,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573364340] [2024-06-21 20:06:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:45,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:45,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:45,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573364340] [2024-06-21 20:06:45,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573364340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:45,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:45,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:45,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027267787] [2024-06-21 20:06:45,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:45,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:45,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:45,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:45,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:45,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:45,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 556 transitions, 8266 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:45,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:45,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:45,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:46,165 INFO L124 PetriNetUnfolderBase]: 2694/4549 cut-off events. [2024-06-21 20:06:46,165 INFO L125 PetriNetUnfolderBase]: For 464673/464673 co-relation queries the response was YES. [2024-06-21 20:06:46,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34507 conditions, 4549 events. 2694/4549 cut-off events. For 464673/464673 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 29562 event pairs, 462 based on Foata normal form. 6/4553 useless extension candidates. Maximal degree in co-relation 34331. Up to 3983 conditions per place. [2024-06-21 20:06:46,223 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 539 selfloop transitions, 36 changer transitions 0/582 dead transitions. [2024-06-21 20:06:46,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 582 transitions, 9546 flow [2024-06-21 20:06:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:06:46,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-21 20:06:46,224 INFO L175 Difference]: Start difference. First operand has 400 places, 556 transitions, 8266 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:06:46,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 582 transitions, 9546 flow [2024-06-21 20:06:49,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 582 transitions, 9478 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 20:06:49,531 INFO L231 Difference]: Finished difference. Result has 406 places, 558 transitions, 8315 flow [2024-06-21 20:06:49,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8200, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8315, PETRI_PLACES=406, PETRI_TRANSITIONS=558} [2024-06-21 20:06:49,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 365 predicate places. [2024-06-21 20:06:49,531 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 558 transitions, 8315 flow [2024-06-21 20:06:49,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:49,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:49,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:49,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:06:49,532 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)] === [2024-06-21 20:06:49,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash -243447268, now seen corresponding path program 1 times [2024-06-21 20:06:49,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:49,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440242908] [2024-06-21 20:06:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:49,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:49,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:49,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440242908] [2024-06-21 20:06:49,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440242908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:49,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:49,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:49,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530442417] [2024-06-21 20:06:49,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:49,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:49,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:49,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:49,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 558 transitions, 8315 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:49,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:49,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:49,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:50,621 INFO L124 PetriNetUnfolderBase]: 2780/4705 cut-off events. [2024-06-21 20:06:50,621 INFO L125 PetriNetUnfolderBase]: For 547746/547763 co-relation queries the response was YES. [2024-06-21 20:06:50,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36280 conditions, 4705 events. 2780/4705 cut-off events. For 547746/547763 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 30869 event pairs, 484 based on Foata normal form. 24/4722 useless extension candidates. Maximal degree in co-relation 36101. Up to 3629 conditions per place. [2024-06-21 20:06:50,671 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 428 selfloop transitions, 152 changer transitions 0/587 dead transitions. [2024-06-21 20:06:50,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 587 transitions, 9827 flow [2024-06-21 20:06:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:06:50,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:06:50,672 INFO L175 Difference]: Start difference. First operand has 406 places, 558 transitions, 8315 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:06:50,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 587 transitions, 9827 flow [2024-06-21 20:06:53,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 587 transitions, 9674 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:06:53,651 INFO L231 Difference]: Finished difference. Result has 407 places, 561 transitions, 8531 flow [2024-06-21 20:06:53,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8162, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8531, PETRI_PLACES=407, PETRI_TRANSITIONS=561} [2024-06-21 20:06:53,652 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-21 20:06:53,652 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 561 transitions, 8531 flow [2024-06-21 20:06:53,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:53,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:53,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:53,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:06:53,652 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)] === [2024-06-21 20:06:53,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:53,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1497907884, now seen corresponding path program 2 times [2024-06-21 20:06:53,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:53,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597660149] [2024-06-21 20:06:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:53,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:53,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:53,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597660149] [2024-06-21 20:06:53,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597660149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:53,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:53,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:53,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308125145] [2024-06-21 20:06:53,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:53,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:53,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:53,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:53,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:53,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:53,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 561 transitions, 8531 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:53,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:53,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:53,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:54,731 INFO L124 PetriNetUnfolderBase]: 2912/4909 cut-off events. [2024-06-21 20:06:54,731 INFO L125 PetriNetUnfolderBase]: For 643264/643281 co-relation queries the response was YES. [2024-06-21 20:06:54,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39316 conditions, 4909 events. 2912/4909 cut-off events. For 643264/643281 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 32295 event pairs, 571 based on Foata normal form. 24/4926 useless extension candidates. Maximal degree in co-relation 39138. Up to 4055 conditions per place. [2024-06-21 20:06:54,795 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 436 selfloop transitions, 144 changer transitions 0/587 dead transitions. [2024-06-21 20:06:54,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 587 transitions, 10057 flow [2024-06-21 20:06:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:06:54,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-21 20:06:54,796 INFO L175 Difference]: Start difference. First operand has 407 places, 561 transitions, 8531 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:06:54,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 587 transitions, 10057 flow [2024-06-21 20:06:58,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 587 transitions, 9772 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:06:58,480 INFO L231 Difference]: Finished difference. Result has 410 places, 565 transitions, 8623 flow [2024-06-21 20:06:58,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8250, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8623, PETRI_PLACES=410, PETRI_TRANSITIONS=565} [2024-06-21 20:06:58,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-21 20:06:58,480 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 565 transitions, 8623 flow [2024-06-21 20:06:58,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:58,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:58,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:58,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:06:58,481 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)] === [2024-06-21 20:06:58,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:58,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1498055754, now seen corresponding path program 3 times [2024-06-21 20:06:58,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:58,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868206387] [2024-06-21 20:06:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:58,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:58,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868206387] [2024-06-21 20:06:58,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868206387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:58,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:58,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:58,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162944799] [2024-06-21 20:06:58,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:58,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:58,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:58,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:58,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:58,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:58,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 565 transitions, 8623 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:58,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:58,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:58,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:59,505 INFO L124 PetriNetUnfolderBase]: 2876/4857 cut-off events. [2024-06-21 20:06:59,505 INFO L125 PetriNetUnfolderBase]: For 593838/593855 co-relation queries the response was YES. [2024-06-21 20:06:59,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37536 conditions, 4857 events. 2876/4857 cut-off events. For 593838/593855 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31974 event pairs, 567 based on Foata normal form. 28/4878 useless extension candidates. Maximal degree in co-relation 37357. Up to 4099 conditions per place. [2024-06-21 20:06:59,570 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 436 selfloop transitions, 140 changer transitions 0/583 dead transitions. [2024-06-21 20:06:59,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 583 transitions, 9841 flow [2024-06-21 20:06:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:06:59,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-21 20:06:59,572 INFO L175 Difference]: Start difference. First operand has 410 places, 565 transitions, 8623 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:06:59,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 583 transitions, 9841 flow [2024-06-21 20:07:02,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 583 transitions, 9633 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 20:07:03,004 INFO L231 Difference]: Finished difference. Result has 414 places, 565 transitions, 8701 flow [2024-06-21 20:07:03,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8415, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8701, PETRI_PLACES=414, PETRI_TRANSITIONS=565} [2024-06-21 20:07:03,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2024-06-21 20:07:03,005 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 565 transitions, 8701 flow [2024-06-21 20:07:03,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:03,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:03,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:03,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:07:03,005 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)] === [2024-06-21 20:07:03,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:03,006 INFO L85 PathProgramCache]: Analyzing trace with hash 693269642, now seen corresponding path program 4 times [2024-06-21 20:07:03,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:03,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478075934] [2024-06-21 20:07:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:03,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:03,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:03,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478075934] [2024-06-21 20:07:03,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478075934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:03,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:03,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:03,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657260100] [2024-06-21 20:07:03,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:03,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:03,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:03,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:03,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:03,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:03,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 565 transitions, 8701 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:03,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:03,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:03,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:04,066 INFO L124 PetriNetUnfolderBase]: 2919/4925 cut-off events. [2024-06-21 20:07:04,067 INFO L125 PetriNetUnfolderBase]: For 588338/588344 co-relation queries the response was YES. [2024-06-21 20:07:04,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37943 conditions, 4925 events. 2919/4925 cut-off events. For 588338/588344 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32436 event pairs, 529 based on Foata normal form. 20/4942 useless extension candidates. Maximal degree in co-relation 37762. Up to 4250 conditions per place. [2024-06-21 20:07:04,130 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 499 selfloop transitions, 85 changer transitions 0/591 dead transitions. [2024-06-21 20:07:04,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 591 transitions, 9993 flow [2024-06-21 20:07:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:07:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:07:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:07:04,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:07:04,131 INFO L175 Difference]: Start difference. First operand has 414 places, 565 transitions, 8701 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:07:04,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 591 transitions, 9993 flow [2024-06-21 20:07:07,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 591 transitions, 9705 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:07,334 INFO L231 Difference]: Finished difference. Result has 415 places, 567 transitions, 8637 flow [2024-06-21 20:07:07,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8413, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8637, PETRI_PLACES=415, PETRI_TRANSITIONS=567} [2024-06-21 20:07:07,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-21 20:07:07,334 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 567 transitions, 8637 flow [2024-06-21 20:07:07,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:07,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:07,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:07,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:07:07,335 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)] === [2024-06-21 20:07:07,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:07,335 INFO L85 PathProgramCache]: Analyzing trace with hash 693121772, now seen corresponding path program 5 times [2024-06-21 20:07:07,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:07,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595842159] [2024-06-21 20:07:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:07,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:07,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:07,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595842159] [2024-06-21 20:07:07,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595842159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:07,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:07,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:07,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991926974] [2024-06-21 20:07:07,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:07,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:07,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:07,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:07,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:07,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:07,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 567 transitions, 8637 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:07,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:07,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:07,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:08,463 INFO L124 PetriNetUnfolderBase]: 2972/5012 cut-off events. [2024-06-21 20:07:08,464 INFO L125 PetriNetUnfolderBase]: For 591468/591474 co-relation queries the response was YES. [2024-06-21 20:07:08,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38840 conditions, 5012 events. 2972/5012 cut-off events. For 591468/591474 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33086 event pairs, 461 based on Foata normal form. 16/5025 useless extension candidates. Maximal degree in co-relation 38658. Up to 4108 conditions per place. [2024-06-21 20:07:08,527 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 499 selfloop transitions, 94 changer transitions 0/600 dead transitions. [2024-06-21 20:07:08,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 600 transitions, 10195 flow [2024-06-21 20:07:08,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:07:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:07:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:07:08,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-21 20:07:08,528 INFO L175 Difference]: Start difference. First operand has 415 places, 567 transitions, 8637 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:07:08,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 600 transitions, 10195 flow [2024-06-21 20:07:11,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 600 transitions, 10005 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:07:11,337 INFO L231 Difference]: Finished difference. Result has 417 places, 569 transitions, 8698 flow [2024-06-21 20:07:11,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8447, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8698, PETRI_PLACES=417, PETRI_TRANSITIONS=569} [2024-06-21 20:07:11,337 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-21 20:07:11,337 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 569 transitions, 8698 flow [2024-06-21 20:07:11,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:11,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:11,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:11,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:07:11,338 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)] === [2024-06-21 20:07:11,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:11,338 INFO L85 PathProgramCache]: Analyzing trace with hash 698847224, now seen corresponding path program 1 times [2024-06-21 20:07:11,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:11,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050116056] [2024-06-21 20:07:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:11,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:11,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:11,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050116056] [2024-06-21 20:07:11,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050116056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:11,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:11,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:11,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952315688] [2024-06-21 20:07:11,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:11,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:11,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:11,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:11,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:11,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:11,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 569 transitions, 8698 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:11,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:11,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:11,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:12,461 INFO L124 PetriNetUnfolderBase]: 2939/4961 cut-off events. [2024-06-21 20:07:12,461 INFO L125 PetriNetUnfolderBase]: For 537583/537589 co-relation queries the response was YES. [2024-06-21 20:07:12,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37360 conditions, 4961 events. 2939/4961 cut-off events. For 537583/537589 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 32740 event pairs, 416 based on Foata normal form. 16/4974 useless extension candidates. Maximal degree in co-relation 37177. Up to 4013 conditions per place. [2024-06-21 20:07:12,522 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 517 selfloop transitions, 71 changer transitions 0/595 dead transitions. [2024-06-21 20:07:12,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 595 transitions, 9972 flow [2024-06-21 20:07:12,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:07:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:07:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 20:07:12,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-21 20:07:12,524 INFO L175 Difference]: Start difference. First operand has 417 places, 569 transitions, 8698 flow. Second operand 6 states and 155 transitions. [2024-06-21 20:07:12,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 595 transitions, 9972 flow [2024-06-21 20:07:15,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 595 transitions, 9793 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 20:07:15,611 INFO L231 Difference]: Finished difference. Result has 419 places, 569 transitions, 8668 flow [2024-06-21 20:07:15,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8519, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8668, PETRI_PLACES=419, PETRI_TRANSITIONS=569} [2024-06-21 20:07:15,611 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-21 20:07:15,611 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 569 transitions, 8668 flow [2024-06-21 20:07:15,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:15,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:15,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:15,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 20:07:15,612 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)] === [2024-06-21 20:07:15,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:15,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1900713337, now seen corresponding path program 1 times [2024-06-21 20:07:15,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:15,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108586441] [2024-06-21 20:07:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:15,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:15,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:15,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108586441] [2024-06-21 20:07:15,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108586441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:15,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:15,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:15,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830010655] [2024-06-21 20:07:15,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:15,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:15,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:15,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:15,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:15,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 569 transitions, 8668 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:15,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:15,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:15,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:16,701 INFO L124 PetriNetUnfolderBase]: 3006/5039 cut-off events. [2024-06-21 20:07:16,701 INFO L125 PetriNetUnfolderBase]: For 547254/547254 co-relation queries the response was YES. [2024-06-21 20:07:16,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39035 conditions, 5039 events. 3006/5039 cut-off events. For 547254/547254 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33038 event pairs, 480 based on Foata normal form. 2/5026 useless extension candidates. Maximal degree in co-relation 38851. Up to 3891 conditions per place. [2024-06-21 20:07:16,765 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 409 selfloop transitions, 197 changer transitions 0/613 dead transitions. [2024-06-21 20:07:16,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 613 transitions, 10570 flow [2024-06-21 20:07:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:16,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:16,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:07:16,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-21 20:07:16,766 INFO L175 Difference]: Start difference. First operand has 419 places, 569 transitions, 8668 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:07:16,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 613 transitions, 10570 flow [2024-06-21 20:07:21,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 613 transitions, 10381 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:07:21,210 INFO L231 Difference]: Finished difference. Result has 422 places, 575 transitions, 9032 flow [2024-06-21 20:07:21,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8479, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9032, PETRI_PLACES=422, PETRI_TRANSITIONS=575} [2024-06-21 20:07:21,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-21 20:07:21,211 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 575 transitions, 9032 flow [2024-06-21 20:07:21,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:21,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:21,211 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] [2024-06-21 20:07:21,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 20:07:21,211 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)] === [2024-06-21 20:07:21,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:21,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1906427257, now seen corresponding path program 2 times [2024-06-21 20:07:21,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:21,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510945771] [2024-06-21 20:07:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:21,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:21,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:21,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510945771] [2024-06-21 20:07:21,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510945771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:21,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:21,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:21,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581391204] [2024-06-21 20:07:21,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:21,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:21,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:21,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:21,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:21,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:21,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 575 transitions, 9032 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:21,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:21,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:21,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:22,346 INFO L124 PetriNetUnfolderBase]: 3073/5140 cut-off events. [2024-06-21 20:07:22,346 INFO L125 PetriNetUnfolderBase]: For 615943/615943 co-relation queries the response was YES. [2024-06-21 20:07:22,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41111 conditions, 5140 events. 3073/5140 cut-off events. For 615943/615943 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 33769 event pairs, 472 based on Foata normal form. 2/5127 useless extension candidates. Maximal degree in co-relation 40926. Up to 3935 conditions per place. [2024-06-21 20:07:22,412 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 409 selfloop transitions, 201 changer transitions 0/617 dead transitions. [2024-06-21 20:07:22,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 617 transitions, 10930 flow [2024-06-21 20:07:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:07:22,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-21 20:07:22,413 INFO L175 Difference]: Start difference. First operand has 422 places, 575 transitions, 9032 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:07:22,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 617 transitions, 10930 flow [2024-06-21 20:07:25,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 617 transitions, 10616 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-21 20:07:25,745 INFO L231 Difference]: Finished difference. Result has 427 places, 579 transitions, 9233 flow [2024-06-21 20:07:25,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8744, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9233, PETRI_PLACES=427, PETRI_TRANSITIONS=579} [2024-06-21 20:07:25,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-21 20:07:25,746 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 579 transitions, 9233 flow [2024-06-21 20:07:25,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:25,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:25,746 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] [2024-06-21 20:07:25,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 20:07:25,746 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)] === [2024-06-21 20:07:25,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:25,747 INFO L85 PathProgramCache]: Analyzing trace with hash 351284601, now seen corresponding path program 3 times [2024-06-21 20:07:25,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:25,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54294212] [2024-06-21 20:07:25,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:25,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:25,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:25,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54294212] [2024-06-21 20:07:25,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54294212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:25,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:25,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:25,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261895332] [2024-06-21 20:07:25,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:25,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:25,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:25,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:25,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:25,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:25,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 579 transitions, 9233 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:25,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:25,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:25,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:26,913 INFO L124 PetriNetUnfolderBase]: 3094/5166 cut-off events. [2024-06-21 20:07:26,914 INFO L125 PetriNetUnfolderBase]: For 638281/638281 co-relation queries the response was YES. [2024-06-21 20:07:26,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41980 conditions, 5166 events. 3094/5166 cut-off events. For 638281/638281 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 33969 event pairs, 615 based on Foata normal form. 2/5148 useless extension candidates. Maximal degree in co-relation 41793. Up to 4357 conditions per place. [2024-06-21 20:07:26,980 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 422 selfloop transitions, 187 changer transitions 0/616 dead transitions. [2024-06-21 20:07:26,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 616 transitions, 10855 flow [2024-06-21 20:07:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:07:26,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-21 20:07:26,982 INFO L175 Difference]: Start difference. First operand has 427 places, 579 transitions, 9233 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:07:26,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 616 transitions, 10855 flow [2024-06-21 20:07:31,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 616 transitions, 10475 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:07:31,981 INFO L231 Difference]: Finished difference. Result has 432 places, 583 transitions, 9357 flow [2024-06-21 20:07:31,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8859, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9357, PETRI_PLACES=432, PETRI_TRANSITIONS=583} [2024-06-21 20:07:31,982 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-21 20:07:31,982 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 583 transitions, 9357 flow [2024-06-21 20:07:31,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:31,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:31,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:31,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 20:07:31,982 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)] === [2024-06-21 20:07:31,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash 359855481, now seen corresponding path program 4 times [2024-06-21 20:07:31,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:31,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438726469] [2024-06-21 20:07:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:31,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:32,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:32,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438726469] [2024-06-21 20:07:32,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438726469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:32,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:32,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:32,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252906707] [2024-06-21 20:07:32,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:32,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:32,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:32,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:32,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:32,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:32,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 583 transitions, 9357 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:32,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:32,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:32,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:33,252 INFO L124 PetriNetUnfolderBase]: 3102/5183 cut-off events. [2024-06-21 20:07:33,253 INFO L125 PetriNetUnfolderBase]: For 650381/650381 co-relation queries the response was YES. [2024-06-21 20:07:33,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42214 conditions, 5183 events. 3102/5183 cut-off events. For 650381/650381 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34137 event pairs, 622 based on Foata normal form. 2/5170 useless extension candidates. Maximal degree in co-relation 42025. Up to 4404 conditions per place. [2024-06-21 20:07:33,313 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 422 selfloop transitions, 184 changer transitions 0/613 dead transitions. [2024-06-21 20:07:33,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 613 transitions, 10697 flow [2024-06-21 20:07:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:07:33,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:07:33,314 INFO L175 Difference]: Start difference. First operand has 432 places, 583 transitions, 9357 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:07:33,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 613 transitions, 10697 flow [2024-06-21 20:07:36,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 613 transitions, 10257 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 20:07:36,386 INFO L231 Difference]: Finished difference. Result has 435 places, 585 transitions, 9352 flow [2024-06-21 20:07:36,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8937, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9352, PETRI_PLACES=435, PETRI_TRANSITIONS=585} [2024-06-21 20:07:36,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-21 20:07:36,387 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 585 transitions, 9352 flow [2024-06-21 20:07:36,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:36,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:36,387 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] [2024-06-21 20:07:36,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 20:07:36,387 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)] === [2024-06-21 20:07:36,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:36,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1555965305, now seen corresponding path program 5 times [2024-06-21 20:07:36,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:36,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006248500] [2024-06-21 20:07:36,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:36,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:36,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:36,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006248500] [2024-06-21 20:07:36,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006248500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:36,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:36,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:36,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835235547] [2024-06-21 20:07:36,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:36,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:36,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:36,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:36,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:36,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:36,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 585 transitions, 9352 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:36,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:36,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:36,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:37,549 INFO L124 PetriNetUnfolderBase]: 3110/5195 cut-off events. [2024-06-21 20:07:37,549 INFO L125 PetriNetUnfolderBase]: For 660685/660685 co-relation queries the response was YES. [2024-06-21 20:07:37,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42247 conditions, 5195 events. 3110/5195 cut-off events. For 660685/660685 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 34218 event pairs, 622 based on Foata normal form. 2/5182 useless extension candidates. Maximal degree in co-relation 42057. Up to 4416 conditions per place. [2024-06-21 20:07:37,616 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 421 selfloop transitions, 184 changer transitions 0/612 dead transitions. [2024-06-21 20:07:37,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 612 transitions, 10666 flow [2024-06-21 20:07:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:07:37,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 20:07:37,618 INFO L175 Difference]: Start difference. First operand has 435 places, 585 transitions, 9352 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:07:37,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 612 transitions, 10666 flow [2024-06-21 20:07:42,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 612 transitions, 10277 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:42,130 INFO L231 Difference]: Finished difference. Result has 437 places, 587 transitions, 9382 flow [2024-06-21 20:07:42,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8963, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9382, PETRI_PLACES=437, PETRI_TRANSITIONS=587} [2024-06-21 20:07:42,131 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-21 20:07:42,131 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 587 transitions, 9382 flow [2024-06-21 20:07:42,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:42,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:42,131 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] [2024-06-21 20:07:42,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 20:07:42,131 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)] === [2024-06-21 20:07:42,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash 134143571, now seen corresponding path program 6 times [2024-06-21 20:07:42,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:42,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568950816] [2024-06-21 20:07:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:42,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:42,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568950816] [2024-06-21 20:07:42,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568950816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:42,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:42,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:42,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018825973] [2024-06-21 20:07:42,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:42,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:42,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:42,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:42,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:42,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:42,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 587 transitions, 9382 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:42,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:42,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:42,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:43,321 INFO L124 PetriNetUnfolderBase]: 3177/5294 cut-off events. [2024-06-21 20:07:43,321 INFO L125 PetriNetUnfolderBase]: For 734399/734399 co-relation queries the response was YES. [2024-06-21 20:07:43,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44080 conditions, 5294 events. 3177/5294 cut-off events. For 734399/734399 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 34905 event pairs, 633 based on Foata normal form. 2/5279 useless extension candidates. Maximal degree in co-relation 43889. Up to 4436 conditions per place. [2024-06-21 20:07:43,391 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 423 selfloop transitions, 191 changer transitions 0/621 dead transitions. [2024-06-21 20:07:43,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 621 transitions, 11020 flow [2024-06-21 20:07:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:07:43,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-21 20:07:43,393 INFO L175 Difference]: Start difference. First operand has 437 places, 587 transitions, 9382 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:07:43,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 621 transitions, 11020 flow [2024-06-21 20:07:47,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 621 transitions, 10627 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:47,411 INFO L231 Difference]: Finished difference. Result has 440 places, 591 transitions, 9488 flow [2024-06-21 20:07:47,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8989, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9488, PETRI_PLACES=440, PETRI_TRANSITIONS=591} [2024-06-21 20:07:47,412 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 399 predicate places. [2024-06-21 20:07:47,412 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 591 transitions, 9488 flow [2024-06-21 20:07:47,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:47,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:47,412 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] [2024-06-21 20:07:47,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 20:07:47,412 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)] === [2024-06-21 20:07:47,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:47,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1656351296, now seen corresponding path program 1 times [2024-06-21 20:07:47,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:47,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395418953] [2024-06-21 20:07:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:47,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:47,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:47,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395418953] [2024-06-21 20:07:47,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395418953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:47,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:47,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:47,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955378249] [2024-06-21 20:07:47,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:47,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:47,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:47,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:47,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:47,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:47,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 591 transitions, 9488 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:47,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:47,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:47,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:48,576 INFO L124 PetriNetUnfolderBase]: 3182/5331 cut-off events. [2024-06-21 20:07:48,577 INFO L125 PetriNetUnfolderBase]: For 743776/743787 co-relation queries the response was YES. [2024-06-21 20:07:48,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44419 conditions, 5331 events. 3182/5331 cut-off events. For 743776/743787 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 35376 event pairs, 662 based on Foata normal form. 9/5332 useless extension candidates. Maximal degree in co-relation 44226. Up to 4153 conditions per place. [2024-06-21 20:07:48,647 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 293 selfloop transitions, 320 changer transitions 0/620 dead transitions. [2024-06-21 20:07:48,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 620 transitions, 11290 flow [2024-06-21 20:07:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:07:48,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:07:48,648 INFO L175 Difference]: Start difference. First operand has 440 places, 591 transitions, 9488 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:07:48,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 620 transitions, 11290 flow [2024-06-21 20:07:53,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 620 transitions, 10899 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:07:53,463 INFO L231 Difference]: Finished difference. Result has 443 places, 594 transitions, 9811 flow [2024-06-21 20:07:53,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9097, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9811, PETRI_PLACES=443, PETRI_TRANSITIONS=594} [2024-06-21 20:07:53,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-21 20:07:53,464 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 594 transitions, 9811 flow [2024-06-21 20:07:53,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:53,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:53,465 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] [2024-06-21 20:07:53,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 20:07:53,465 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)] === [2024-06-21 20:07:53,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:53,465 INFO L85 PathProgramCache]: Analyzing trace with hash 644887198, now seen corresponding path program 2 times [2024-06-21 20:07:53,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:53,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805892732] [2024-06-21 20:07:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:53,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:53,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:53,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805892732] [2024-06-21 20:07:53,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805892732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:53,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:53,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:07:53,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146462627] [2024-06-21 20:07:53,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:53,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:07:53,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:07:53,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:07:53,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:53,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 594 transitions, 9811 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) [2024-06-21 20:07:53,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:53,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:53,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:54,835 INFO L124 PetriNetUnfolderBase]: 3187/5310 cut-off events. [2024-06-21 20:07:54,835 INFO L125 PetriNetUnfolderBase]: For 755086/755086 co-relation queries the response was YES. [2024-06-21 20:07:54,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44807 conditions, 5310 events. 3187/5310 cut-off events. For 755086/755086 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35069 event pairs, 666 based on Foata normal form. 1/5296 useless extension candidates. Maximal degree in co-relation 44613. Up to 4159 conditions per place. [2024-06-21 20:07:54,900 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 264 selfloop transitions, 356 changer transitions 0/627 dead transitions. [2024-06-21 20:07:54,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 627 transitions, 11647 flow [2024-06-21 20:07:54,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:07:54,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:07:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-21 20:07:54,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:07:54,901 INFO L175 Difference]: Start difference. First operand has 443 places, 594 transitions, 9811 flow. Second operand 9 states and 216 transitions. [2024-06-21 20:07:54,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 627 transitions, 11647 flow [2024-06-21 20:08:01,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 627 transitions, 10618 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-21 20:08:01,496 INFO L231 Difference]: Finished difference. Result has 445 places, 597 transitions, 9574 flow [2024-06-21 20:08:01,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8814, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9574, PETRI_PLACES=445, PETRI_TRANSITIONS=597} [2024-06-21 20:08:01,496 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 404 predicate places. [2024-06-21 20:08:01,497 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 597 transitions, 9574 flow [2024-06-21 20:08:01,497 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) [2024-06-21 20:08:01,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:01,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:01,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 20:08:01,497 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)] === [2024-06-21 20:08:01,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:01,497 INFO L85 PathProgramCache]: Analyzing trace with hash 594555922, now seen corresponding path program 3 times [2024-06-21 20:08:01,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:01,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922822999] [2024-06-21 20:08:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:01,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:01,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:01,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922822999] [2024-06-21 20:08:01,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922822999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:01,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:01,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:08:01,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727447644] [2024-06-21 20:08:01,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:01,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:08:01,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:01,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:08:01,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:08:01,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:01,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 597 transitions, 9574 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) [2024-06-21 20:08:01,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:01,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:01,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:02,738 INFO L124 PetriNetUnfolderBase]: 3192/5320 cut-off events. [2024-06-21 20:08:02,738 INFO L125 PetriNetUnfolderBase]: For 764538/764538 co-relation queries the response was YES. [2024-06-21 20:08:02,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44668 conditions, 5320 events. 3192/5320 cut-off events. For 764538/764538 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 35135 event pairs, 665 based on Foata normal form. 1/5306 useless extension candidates. Maximal degree in co-relation 44475. Up to 4165 conditions per place. [2024-06-21 20:08:02,812 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 264 selfloop transitions, 359 changer transitions 0/630 dead transitions. [2024-06-21 20:08:02,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 630 transitions, 11394 flow [2024-06-21 20:08:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:08:02,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:08:02,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 20:08:02,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-21 20:08:02,814 INFO L175 Difference]: Start difference. First operand has 445 places, 597 transitions, 9574 flow. Second operand 9 states and 218 transitions. [2024-06-21 20:08:02,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 630 transitions, 11394 flow [2024-06-21 20:08:07,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 630 transitions, 10842 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:07,680 INFO L231 Difference]: Finished difference. Result has 448 places, 600 transitions, 9794 flow [2024-06-21 20:08:07,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9025, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9794, PETRI_PLACES=448, PETRI_TRANSITIONS=600} [2024-06-21 20:08:07,681 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 407 predicate places. [2024-06-21 20:08:07,681 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 600 transitions, 9794 flow [2024-06-21 20:08:07,681 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) [2024-06-21 20:08:07,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:07,681 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] [2024-06-21 20:08:07,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 20:08:07,681 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)] === [2024-06-21 20:08:07,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:07,682 INFO L85 PathProgramCache]: Analyzing trace with hash -980745198, now seen corresponding path program 4 times [2024-06-21 20:08:07,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:07,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136853390] [2024-06-21 20:08:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:07,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:07,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:07,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136853390] [2024-06-21 20:08:07,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136853390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:07,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:07,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:08:07,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528386560] [2024-06-21 20:08:07,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:07,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:08:07,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:08:07,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:08:07,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:07,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 600 transitions, 9794 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) [2024-06-21 20:08:07,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:07,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:07,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:08,898 INFO L124 PetriNetUnfolderBase]: 3213/5358 cut-off events. [2024-06-21 20:08:08,899 INFO L125 PetriNetUnfolderBase]: For 793080/793080 co-relation queries the response was YES. [2024-06-21 20:08:08,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45356 conditions, 5358 events. 3213/5358 cut-off events. For 793080/793080 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 35480 event pairs, 662 based on Foata normal form. 1/5344 useless extension candidates. Maximal degree in co-relation 45161. Up to 4189 conditions per place. [2024-06-21 20:08:08,974 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 269 selfloop transitions, 363 changer transitions 0/639 dead transitions. [2024-06-21 20:08:08,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 639 transitions, 12201 flow [2024-06-21 20:08:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:08:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:08:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-21 20:08:08,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-21 20:08:08,975 INFO L175 Difference]: Start difference. First operand has 448 places, 600 transitions, 9794 flow. Second operand 10 states and 237 transitions. [2024-06-21 20:08:08,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 639 transitions, 12201 flow [2024-06-21 20:08:13,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 639 transitions, 11433 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:08:13,709 INFO L231 Difference]: Finished difference. Result has 451 places, 609 transitions, 9917 flow [2024-06-21 20:08:13,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9044, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9917, PETRI_PLACES=451, PETRI_TRANSITIONS=609} [2024-06-21 20:08:13,710 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 410 predicate places. [2024-06-21 20:08:13,710 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 609 transitions, 9917 flow [2024-06-21 20:08:13,710 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) [2024-06-21 20:08:13,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:13,711 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] [2024-06-21 20:08:13,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 20:08:13,711 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)] === [2024-06-21 20:08:13,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:13,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2059445246, now seen corresponding path program 5 times [2024-06-21 20:08:13,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:13,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248696877] [2024-06-21 20:08:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:13,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:13,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:13,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248696877] [2024-06-21 20:08:13,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248696877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:13,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:13,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:08:13,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008771834] [2024-06-21 20:08:13,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:13,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:08:13,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:13,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:08:13,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:08:13,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:13,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 609 transitions, 9917 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) [2024-06-21 20:08:13,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:13,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:13,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:14,935 INFO L124 PetriNetUnfolderBase]: 3226/5375 cut-off events. [2024-06-21 20:08:14,935 INFO L125 PetriNetUnfolderBase]: For 812971/812971 co-relation queries the response was YES. [2024-06-21 20:08:14,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45699 conditions, 5375 events. 3226/5375 cut-off events. For 812971/812971 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 35589 event pairs, 669 based on Foata normal form. 1/5361 useless extension candidates. Maximal degree in co-relation 45503. Up to 4204 conditions per place. [2024-06-21 20:08:15,008 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 265 selfloop transitions, 372 changer transitions 0/644 dead transitions. [2024-06-21 20:08:15,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 644 transitions, 12059 flow [2024-06-21 20:08:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:08:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:08:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-21 20:08:15,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-21 20:08:15,010 INFO L175 Difference]: Start difference. First operand has 451 places, 609 transitions, 9917 flow. Second operand 10 states and 234 transitions. [2024-06-21 20:08:15,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 644 transitions, 12059 flow [2024-06-21 20:08:20,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 644 transitions, 11235 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:20,317 INFO L231 Difference]: Finished difference. Result has 455 places, 615 transitions, 9951 flow [2024-06-21 20:08:20,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9139, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9951, PETRI_PLACES=455, PETRI_TRANSITIONS=615} [2024-06-21 20:08:20,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-21 20:08:20,318 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 615 transitions, 9951 flow [2024-06-21 20:08:20,318 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) [2024-06-21 20:08:20,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:20,318 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] [2024-06-21 20:08:20,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 20:08:20,319 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)] === [2024-06-21 20:08:20,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:20,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1555976000, now seen corresponding path program 6 times [2024-06-21 20:08:20,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:20,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572214221] [2024-06-21 20:08:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:20,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:20,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:20,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572214221] [2024-06-21 20:08:20,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572214221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:20,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:20,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:08:20,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295249573] [2024-06-21 20:08:20,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:20,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:08:20,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:20,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:08:20,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:08:20,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:20,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 615 transitions, 9951 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) [2024-06-21 20:08:20,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:20,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:20,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:21,735 INFO L124 PetriNetUnfolderBase]: 3223/5369 cut-off events. [2024-06-21 20:08:21,748 INFO L125 PetriNetUnfolderBase]: For 819075/819075 co-relation queries the response was YES. [2024-06-21 20:08:21,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45569 conditions, 5369 events. 3223/5369 cut-off events. For 819075/819075 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 35578 event pairs, 672 based on Foata normal form. 1/5355 useless extension candidates. Maximal degree in co-relation 45372. Up to 4201 conditions per place. [2024-06-21 20:08:21,864 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 266 selfloop transitions, 369 changer transitions 0/642 dead transitions. [2024-06-21 20:08:21,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 642 transitions, 11751 flow [2024-06-21 20:08:21,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:08:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:08:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 20:08:21,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-21 20:08:21,881 INFO L175 Difference]: Start difference. First operand has 455 places, 615 transitions, 9951 flow. Second operand 9 states and 215 transitions. [2024-06-21 20:08:21,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 642 transitions, 11751 flow [2024-06-21 20:08:26,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 642 transitions, 11182 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:26,902 INFO L231 Difference]: Finished difference. Result has 458 places, 615 transitions, 10126 flow [2024-06-21 20:08:26,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9382, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10126, PETRI_PLACES=458, PETRI_TRANSITIONS=615} [2024-06-21 20:08:26,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 417 predicate places. [2024-06-21 20:08:26,903 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 615 transitions, 10126 flow [2024-06-21 20:08:26,903 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) [2024-06-21 20:08:26,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:26,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:26,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 20:08:26,904 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)] === [2024-06-21 20:08:26,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:26,904 INFO L85 PathProgramCache]: Analyzing trace with hash -523050725, now seen corresponding path program 7 times [2024-06-21 20:08:26,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:26,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271950739] [2024-06-21 20:08:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:26,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:27,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:27,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271950739] [2024-06-21 20:08:27,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271950739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:27,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:27,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:27,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066238903] [2024-06-21 20:08:27,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:27,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:27,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:27,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:27,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:27,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:27,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 615 transitions, 10126 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:27,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:27,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:27,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:28,196 INFO L124 PetriNetUnfolderBase]: 3257/5436 cut-off events. [2024-06-21 20:08:28,196 INFO L125 PetriNetUnfolderBase]: For 869689/869689 co-relation queries the response was YES. [2024-06-21 20:08:28,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46770 conditions, 5436 events. 3257/5436 cut-off events. For 869689/869689 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36127 event pairs, 593 based on Foata normal form. 2/5424 useless extension candidates. Maximal degree in co-relation 46571. Up to 4782 conditions per place. [2024-06-21 20:08:28,268 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 557 selfloop transitions, 87 changer transitions 0/651 dead transitions. [2024-06-21 20:08:28,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 651 transitions, 11894 flow [2024-06-21 20:08:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:08:28,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-21 20:08:28,269 INFO L175 Difference]: Start difference. First operand has 458 places, 615 transitions, 10126 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:08:28,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 651 transitions, 11894 flow [2024-06-21 20:08:34,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 651 transitions, 11148 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:08:34,034 INFO L231 Difference]: Finished difference. Result has 459 places, 621 transitions, 9754 flow [2024-06-21 20:08:34,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9380, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9754, PETRI_PLACES=459, PETRI_TRANSITIONS=621} [2024-06-21 20:08:34,035 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-21 20:08:34,035 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 621 transitions, 9754 flow [2024-06-21 20:08:34,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:34,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:34,035 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] [2024-06-21 20:08:34,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 20:08:34,035 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)] === [2024-06-21 20:08:34,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:34,036 INFO L85 PathProgramCache]: Analyzing trace with hash -514479845, now seen corresponding path program 8 times [2024-06-21 20:08:34,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:34,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814918180] [2024-06-21 20:08:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:34,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:34,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:34,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814918180] [2024-06-21 20:08:34,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814918180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:34,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:34,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:34,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902579307] [2024-06-21 20:08:34,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:34,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:34,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:34,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:34,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 621 transitions, 9754 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:34,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:34,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:34,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:35,338 INFO L124 PetriNetUnfolderBase]: 3252/5434 cut-off events. [2024-06-21 20:08:35,338 INFO L125 PetriNetUnfolderBase]: For 867590/867590 co-relation queries the response was YES. [2024-06-21 20:08:35,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46078 conditions, 5434 events. 3252/5434 cut-off events. For 867590/867590 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36101 event pairs, 599 based on Foata normal form. 2/5427 useless extension candidates. Maximal degree in co-relation 45877. Up to 4817 conditions per place. [2024-06-21 20:08:35,406 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 557 selfloop transitions, 82 changer transitions 0/646 dead transitions. [2024-06-21 20:08:35,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 646 transitions, 11094 flow [2024-06-21 20:08:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:08:35,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 20:08:35,408 INFO L175 Difference]: Start difference. First operand has 459 places, 621 transitions, 9754 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:08:35,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 646 transitions, 11094 flow [2024-06-21 20:08:40,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 646 transitions, 10846 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-21 20:08:40,736 INFO L231 Difference]: Finished difference. Result has 462 places, 621 transitions, 9675 flow [2024-06-21 20:08:40,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9506, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9675, PETRI_PLACES=462, PETRI_TRANSITIONS=621} [2024-06-21 20:08:40,736 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-21 20:08:40,736 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 621 transitions, 9675 flow [2024-06-21 20:08:40,736 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) [2024-06-21 20:08:40,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:40,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:40,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 20:08:40,737 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)] === [2024-06-21 20:08:40,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash -227592515, now seen corresponding path program 9 times [2024-06-21 20:08:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:40,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067140716] [2024-06-21 20:08:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:40,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:40,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:40,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067140716] [2024-06-21 20:08:40,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067140716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:40,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:40,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:40,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875967108] [2024-06-21 20:08:40,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:40,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:40,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:40,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:40,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 621 transitions, 9675 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:40,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:40,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:40,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:42,111 INFO L124 PetriNetUnfolderBase]: 3260/5446 cut-off events. [2024-06-21 20:08:42,112 INFO L125 PetriNetUnfolderBase]: For 880178/880178 co-relation queries the response was YES. [2024-06-21 20:08:42,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46085 conditions, 5446 events. 3260/5446 cut-off events. For 880178/880178 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 36202 event pairs, 599 based on Foata normal form. 2/5439 useless extension candidates. Maximal degree in co-relation 45883. Up to 4829 conditions per place. [2024-06-21 20:08:42,176 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 560 selfloop transitions, 83 changer transitions 0/650 dead transitions. [2024-06-21 20:08:42,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 650 transitions, 11069 flow [2024-06-21 20:08:42,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:08:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:08:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-21 20:08:42,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-21 20:08:42,178 INFO L175 Difference]: Start difference. First operand has 462 places, 621 transitions, 9675 flow. Second operand 10 states and 222 transitions. [2024-06-21 20:08:42,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 650 transitions, 11069 flow [2024-06-21 20:08:47,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 650 transitions, 10886 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:47,926 INFO L231 Difference]: Finished difference. Result has 466 places, 623 transitions, 9709 flow [2024-06-21 20:08:47,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9492, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9709, PETRI_PLACES=466, PETRI_TRANSITIONS=623} [2024-06-21 20:08:47,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 425 predicate places. [2024-06-21 20:08:47,927 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 623 transitions, 9709 flow [2024-06-21 20:08:47,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:47,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:47,927 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] [2024-06-21 20:08:47,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 20:08:47,928 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)] === [2024-06-21 20:08:47,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:47,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1802893635, now seen corresponding path program 10 times [2024-06-21 20:08:47,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:47,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025442146] [2024-06-21 20:08:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:48,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:48,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025442146] [2024-06-21 20:08:48,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025442146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:48,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:48,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:48,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255357202] [2024-06-21 20:08:48,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:48,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:48,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:48,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:48,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:48,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:48,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 623 transitions, 9709 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:48,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:48,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:48,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:49,290 INFO L124 PetriNetUnfolderBase]: 3268/5458 cut-off events. [2024-06-21 20:08:49,291 INFO L125 PetriNetUnfolderBase]: For 894179/894179 co-relation queries the response was YES. [2024-06-21 20:08:49,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46285 conditions, 5458 events. 3268/5458 cut-off events. For 894179/894179 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 36271 event pairs, 599 based on Foata normal form. 2/5451 useless extension candidates. Maximal degree in co-relation 46082. Up to 4859 conditions per place. [2024-06-21 20:08:49,357 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 566 selfloop transitions, 71 changer transitions 0/644 dead transitions. [2024-06-21 20:08:49,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 644 transitions, 11075 flow [2024-06-21 20:08:49,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 20:08:49,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 20:08:49,358 INFO L175 Difference]: Start difference. First operand has 466 places, 623 transitions, 9709 flow. Second operand 8 states and 180 transitions. [2024-06-21 20:08:49,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 644 transitions, 11075 flow [2024-06-21 20:08:54,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 644 transitions, 10884 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 20:08:54,434 INFO L231 Difference]: Finished difference. Result has 466 places, 625 transitions, 9715 flow [2024-06-21 20:08:54,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9518, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9715, PETRI_PLACES=466, PETRI_TRANSITIONS=625} [2024-06-21 20:08:54,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 425 predicate places. [2024-06-21 20:08:54,435 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 625 transitions, 9715 flow [2024-06-21 20:08:54,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:54,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:54,435 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] [2024-06-21 20:08:54,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 20:08:54,435 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:54,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:54,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1918184805, now seen corresponding path program 11 times [2024-06-21 20:08:54,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:54,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601387729] [2024-06-21 20:08:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:54,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:54,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:54,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601387729] [2024-06-21 20:08:54,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601387729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:54,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:54,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:54,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98197759] [2024-06-21 20:08:54,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:54,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:54,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:54,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:54,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:54,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:54,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 625 transitions, 9715 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:54,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:54,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:54,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:55,642 INFO L124 PetriNetUnfolderBase]: 3276/5455 cut-off events. [2024-06-21 20:08:55,642 INFO L125 PetriNetUnfolderBase]: For 909609/909609 co-relation queries the response was YES. [2024-06-21 20:08:55,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46425 conditions, 5455 events. 3276/5455 cut-off events. For 909609/909609 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 36123 event pairs, 639 based on Foata normal form. 2/5442 useless extension candidates. Maximal degree in co-relation 46221. Up to 4660 conditions per place. [2024-06-21 20:08:55,715 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 459 selfloop transitions, 180 changer transitions 0/646 dead transitions. [2024-06-21 20:08:55,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 646 transitions, 11085 flow [2024-06-21 20:08:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:55,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:08:55,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 20:08:55,717 INFO L175 Difference]: Start difference. First operand has 466 places, 625 transitions, 9715 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:08:55,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 646 transitions, 11085 flow [2024-06-21 20:09:01,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 646 transitions, 10914 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:09:01,735 INFO L231 Difference]: Finished difference. Result has 468 places, 627 transitions, 9959 flow [2024-06-21 20:09:01,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9544, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9959, PETRI_PLACES=468, PETRI_TRANSITIONS=627} [2024-06-21 20:09:01,735 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 427 predicate places. [2024-06-21 20:09:01,735 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 627 transitions, 9959 flow [2024-06-21 20:09:01,736 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) [2024-06-21 20:09:01,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:01,736 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] [2024-06-21 20:09:01,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 20:09:01,736 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:01,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1921041765, now seen corresponding path program 12 times [2024-06-21 20:09:01,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:01,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657603615] [2024-06-21 20:09:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:01,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:01,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:01,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657603615] [2024-06-21 20:09:01,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657603615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:01,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:01,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:01,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625456958] [2024-06-21 20:09:01,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:01,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:01,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:01,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:01,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:01,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:01,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 627 transitions, 9959 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:01,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:01,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:01,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:03,005 INFO L124 PetriNetUnfolderBase]: 3343/5554 cut-off events. [2024-06-21 20:09:03,005 INFO L125 PetriNetUnfolderBase]: For 1002114/1002114 co-relation queries the response was YES. [2024-06-21 20:09:03,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48726 conditions, 5554 events. 3343/5554 cut-off events. For 1002114/1002114 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 36808 event pairs, 650 based on Foata normal form. 2/5539 useless extension candidates. Maximal degree in co-relation 48521. Up to 4676 conditions per place. [2024-06-21 20:09:03,080 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 459 selfloop transitions, 189 changer transitions 0/655 dead transitions. [2024-06-21 20:09:03,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 655 transitions, 11685 flow [2024-06-21 20:09:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:09:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:09:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:09:03,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 20:09:03,081 INFO L175 Difference]: Start difference. First operand has 468 places, 627 transitions, 9959 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:09:03,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 655 transitions, 11685 flow [2024-06-21 20:09:08,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 655 transitions, 11296 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:09:08,759 INFO L231 Difference]: Finished difference. Result has 471 places, 631 transitions, 10079 flow [2024-06-21 20:09:08,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9570, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10079, PETRI_PLACES=471, PETRI_TRANSITIONS=631} [2024-06-21 20:09:08,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 430 predicate places. [2024-06-21 20:09:08,760 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 631 transitions, 10079 flow [2024-06-21 20:09:08,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:08,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:08,760 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] [2024-06-21 20:09:08,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 20:09:08,761 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:08,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:08,761 INFO L85 PathProgramCache]: Analyzing trace with hash -431439747, now seen corresponding path program 1 times [2024-06-21 20:09:08,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:08,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336300848] [2024-06-21 20:09:08,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:08,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:08,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:08,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336300848] [2024-06-21 20:09:08,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336300848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:08,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:08,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:08,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007661490] [2024-06-21 20:09:08,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:08,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:08,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:08,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:08,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 631 transitions, 10079 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:08,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:08,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:08,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:10,072 INFO L124 PetriNetUnfolderBase]: 3351/5584 cut-off events. [2024-06-21 20:09:10,073 INFO L125 PetriNetUnfolderBase]: For 1016869/1016869 co-relation queries the response was YES. [2024-06-21 20:09:10,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49083 conditions, 5584 events. 3351/5584 cut-off events. For 1016869/1016869 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 37150 event pairs, 613 based on Foata normal form. 2/5577 useless extension candidates. Maximal degree in co-relation 48876. Up to 4987 conditions per place. [2024-06-21 20:09:10,152 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 580 selfloop transitions, 68 changer transitions 0/655 dead transitions. [2024-06-21 20:09:10,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 655 transitions, 11461 flow [2024-06-21 20:09:10,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:09:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:09:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 20:09:10,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-21 20:09:10,153 INFO L175 Difference]: Start difference. First operand has 471 places, 631 transitions, 10079 flow. Second operand 8 states and 182 transitions. [2024-06-21 20:09:10,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 655 transitions, 11461 flow [2024-06-21 20:09:16,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 655 transitions, 11068 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:09:16,122 INFO L231 Difference]: Finished difference. Result has 474 places, 633 transitions, 9863 flow [2024-06-21 20:09:16,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9686, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9863, PETRI_PLACES=474, PETRI_TRANSITIONS=633} [2024-06-21 20:09:16,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-21 20:09:16,122 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 633 transitions, 9863 flow [2024-06-21 20:09:16,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:16,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:16,123 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] [2024-06-21 20:09:16,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 20:09:16,123 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:16,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1264974908, now seen corresponding path program 7 times [2024-06-21 20:09:16,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:16,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759639984] [2024-06-21 20:09:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:16,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:16,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:16,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759639984] [2024-06-21 20:09:16,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759639984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:16,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:16,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:16,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465354194] [2024-06-21 20:09:16,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:16,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:16,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:16,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:16,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:16,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:16,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 633 transitions, 9863 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:16,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:16,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:16,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:17,439 INFO L124 PetriNetUnfolderBase]: 3380/5644 cut-off events. [2024-06-21 20:09:17,440 INFO L125 PetriNetUnfolderBase]: For 1050494/1050511 co-relation queries the response was YES. [2024-06-21 20:09:17,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49545 conditions, 5644 events. 3380/5644 cut-off events. For 1050494/1050511 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 37725 event pairs, 643 based on Foata normal form. 13/5650 useless extension candidates. Maximal degree in co-relation 49337. Up to 4542 conditions per place. [2024-06-21 20:09:17,517 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 344 selfloop transitions, 325 changer transitions 0/676 dead transitions. [2024-06-21 20:09:17,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 676 transitions, 12256 flow [2024-06-21 20:09:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:09:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:09:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 20:09:17,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-21 20:09:17,518 INFO L175 Difference]: Start difference. First operand has 474 places, 633 transitions, 9863 flow. Second operand 9 states and 217 transitions. [2024-06-21 20:09:17,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 676 transitions, 12256 flow [2024-06-21 20:09:24,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 676 transitions, 12091 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:09:24,507 INFO L231 Difference]: Finished difference. Result has 476 places, 645 transitions, 10589 flow [2024-06-21 20:09:24,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9698, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10589, PETRI_PLACES=476, PETRI_TRANSITIONS=645} [2024-06-21 20:09:24,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 435 predicate places. [2024-06-21 20:09:24,508 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 645 transitions, 10589 flow [2024-06-21 20:09:24,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:24,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:24,508 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] [2024-06-21 20:09:24,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 20:09:24,508 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:24,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:24,509 INFO L85 PathProgramCache]: Analyzing trace with hash 214118080, now seen corresponding path program 8 times [2024-06-21 20:09:24,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:24,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265999140] [2024-06-21 20:09:24,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:24,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:24,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:24,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265999140] [2024-06-21 20:09:24,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265999140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:24,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:24,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:24,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457919358] [2024-06-21 20:09:24,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:24,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:24,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:24,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:24,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:24,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:24,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 645 transitions, 10589 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:24,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:24,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:24,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:25,908 INFO L124 PetriNetUnfolderBase]: 3401/5679 cut-off events. [2024-06-21 20:09:25,908 INFO L125 PetriNetUnfolderBase]: For 1085398/1085415 co-relation queries the response was YES. [2024-06-21 20:09:25,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50773 conditions, 5679 events. 3401/5679 cut-off events. For 1085398/1085415 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38026 event pairs, 643 based on Foata normal form. 13/5685 useless extension candidates. Maximal degree in co-relation 50564. Up to 4566 conditions per place. [2024-06-21 20:09:25,991 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 336 selfloop transitions, 341 changer transitions 0/684 dead transitions. [2024-06-21 20:09:25,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 684 transitions, 12945 flow [2024-06-21 20:09:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:09:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:09:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-21 20:09:25,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-21 20:09:25,993 INFO L175 Difference]: Start difference. First operand has 476 places, 645 transitions, 10589 flow. Second operand 11 states and 250 transitions. [2024-06-21 20:09:25,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 684 transitions, 12945 flow [2024-06-21 20:09:33,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 684 transitions, 12242 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:09:33,127 INFO L231 Difference]: Finished difference. Result has 481 places, 654 transitions, 10754 flow [2024-06-21 20:09:33,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9904, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10754, PETRI_PLACES=481, PETRI_TRANSITIONS=654} [2024-06-21 20:09:33,128 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 440 predicate places. [2024-06-21 20:09:33,128 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 654 transitions, 10754 flow [2024-06-21 20:09:33,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:33,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:33,128 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] [2024-06-21 20:09:33,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 20:09:33,129 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:33,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:33,129 INFO L85 PathProgramCache]: Analyzing trace with hash 214106920, now seen corresponding path program 9 times [2024-06-21 20:09:33,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:33,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024698485] [2024-06-21 20:09:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:33,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:33,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:33,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024698485] [2024-06-21 20:09:33,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024698485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:33,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:33,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:33,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035235724] [2024-06-21 20:09:33,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:33,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:33,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:33,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:33,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:33,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:33,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 654 transitions, 10754 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:33,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:33,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:33,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:34,461 INFO L124 PetriNetUnfolderBase]: 3398/5675 cut-off events. [2024-06-21 20:09:34,461 INFO L125 PetriNetUnfolderBase]: For 1093432/1093449 co-relation queries the response was YES. [2024-06-21 20:09:34,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50736 conditions, 5675 events. 3398/5675 cut-off events. For 1093432/1093449 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37982 event pairs, 643 based on Foata normal form. 13/5681 useless extension candidates. Maximal degree in co-relation 50526. Up to 4563 conditions per place. [2024-06-21 20:09:34,539 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 338 selfloop transitions, 338 changer transitions 0/683 dead transitions. [2024-06-21 20:09:34,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 683 transitions, 12932 flow [2024-06-21 20:09:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:09:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:09:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-21 20:09:34,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-21 20:09:34,541 INFO L175 Difference]: Start difference. First operand has 481 places, 654 transitions, 10754 flow. Second operand 10 states and 234 transitions. [2024-06-21 20:09:34,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 683 transitions, 12932 flow [2024-06-21 20:09:41,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 683 transitions, 12297 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 20:09:41,653 INFO L231 Difference]: Finished difference. Result has 484 places, 654 transitions, 10801 flow [2024-06-21 20:09:41,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10119, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10801, PETRI_PLACES=484, PETRI_TRANSITIONS=654} [2024-06-21 20:09:41,653 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-21 20:09:41,653 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 654 transitions, 10801 flow [2024-06-21 20:09:41,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:41,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:41,654 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] [2024-06-21 20:09:41,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 20:09:41,654 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:41,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:41,654 INFO L85 PathProgramCache]: Analyzing trace with hash 38618710, now seen corresponding path program 10 times [2024-06-21 20:09:41,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:41,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420552994] [2024-06-21 20:09:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:41,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:41,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:41,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420552994] [2024-06-21 20:09:41,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420552994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:41,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:41,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:41,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640477201] [2024-06-21 20:09:41,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:41,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:41,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:41,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:41,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:41,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:41,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 654 transitions, 10801 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:41,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:41,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:41,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:43,099 INFO L124 PetriNetUnfolderBase]: 3395/5669 cut-off events. [2024-06-21 20:09:43,099 INFO L125 PetriNetUnfolderBase]: For 1102249/1102260 co-relation queries the response was YES. [2024-06-21 20:09:43,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50729 conditions, 5669 events. 3395/5669 cut-off events. For 1102249/1102260 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37891 event pairs, 680 based on Foata normal form. 9/5670 useless extension candidates. Maximal degree in co-relation 50518. Up to 4560 conditions per place. [2024-06-21 20:09:43,166 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 360 selfloop transitions, 309 changer transitions 0/676 dead transitions. [2024-06-21 20:09:43,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 676 transitions, 12701 flow [2024-06-21 20:09:43,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:09:43,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:09:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:09:43,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:09:43,167 INFO L175 Difference]: Start difference. First operand has 484 places, 654 transitions, 10801 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:09:43,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 676 transitions, 12701 flow [2024-06-21 20:09:51,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 676 transitions, 12019 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:09:51,803 INFO L231 Difference]: Finished difference. Result has 484 places, 654 transitions, 10743 flow [2024-06-21 20:09:51,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10119, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10743, PETRI_PLACES=484, PETRI_TRANSITIONS=654} [2024-06-21 20:09:51,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-21 20:09:51,803 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 654 transitions, 10743 flow [2024-06-21 20:09:51,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:51,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:51,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:09:51,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 20:09:51,804 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:51,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash 42343360, now seen corresponding path program 11 times [2024-06-21 20:09:51,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:51,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688246272] [2024-06-21 20:09:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:51,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:51,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:51,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688246272] [2024-06-21 20:09:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688246272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:51,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:51,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:09:51,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177600165] [2024-06-21 20:09:51,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:51,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:09:51,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:09:51,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:09:51,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:51,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 654 transitions, 10743 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) [2024-06-21 20:09:51,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:51,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:51,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:53,321 INFO L124 PetriNetUnfolderBase]: 3400/5663 cut-off events. [2024-06-21 20:09:53,321 INFO L125 PetriNetUnfolderBase]: For 1115165/1115165 co-relation queries the response was YES. [2024-06-21 20:09:53,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50803 conditions, 5663 events. 3400/5663 cut-off events. For 1115165/1115165 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37757 event pairs, 633 based on Foata normal form. 1/5655 useless extension candidates. Maximal degree in co-relation 50591. Up to 4892 conditions per place. [2024-06-21 20:09:53,389 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 486 selfloop transitions, 189 changer transitions 0/682 dead transitions. [2024-06-21 20:09:53,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 682 transitions, 12194 flow [2024-06-21 20:09:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:09:53,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:09:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 20:09:53,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-21 20:09:53,390 INFO L175 Difference]: Start difference. First operand has 484 places, 654 transitions, 10743 flow. Second operand 9 states and 208 transitions. [2024-06-21 20:09:53,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 682 transitions, 12194 flow [2024-06-21 20:10:00,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 682 transitions, 11545 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:10:00,762 INFO L231 Difference]: Finished difference. Result has 486 places, 657 transitions, 10523 flow [2024-06-21 20:10:00,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10100, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10523, PETRI_PLACES=486, PETRI_TRANSITIONS=657} [2024-06-21 20:10:00,763 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 445 predicate places. [2024-06-21 20:10:00,763 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 657 transitions, 10523 flow [2024-06-21 20:10:00,763 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) [2024-06-21 20:10:00,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:00,763 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] [2024-06-21 20:10:00,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 20:10:00,764 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:00,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:00,764 INFO L85 PathProgramCache]: Analyzing trace with hash -508467068, now seen corresponding path program 12 times [2024-06-21 20:10:00,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:00,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015897779] [2024-06-21 20:10:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:00,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:00,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:00,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015897779] [2024-06-21 20:10:00,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015897779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:00,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:00,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:10:00,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218346029] [2024-06-21 20:10:00,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:00,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:10:00,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:00,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:10:00,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:10:00,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:00,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 657 transitions, 10523 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) [2024-06-21 20:10:00,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:00,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:00,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:02,245 INFO L124 PetriNetUnfolderBase]: 3405/5672 cut-off events. [2024-06-21 20:10:02,245 INFO L125 PetriNetUnfolderBase]: For 1129751/1129751 co-relation queries the response was YES. [2024-06-21 20:10:02,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50641 conditions, 5672 events. 3405/5672 cut-off events. For 1129751/1129751 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 37812 event pairs, 633 based on Foata normal form. 1/5664 useless extension candidates. Maximal degree in co-relation 50428. Up to 4893 conditions per place. [2024-06-21 20:10:02,317 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 484 selfloop transitions, 194 changer transitions 0/685 dead transitions. [2024-06-21 20:10:02,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 685 transitions, 11978 flow [2024-06-21 20:10:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:10:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:10:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 20:10:02,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:10:02,318 INFO L175 Difference]: Start difference. First operand has 486 places, 657 transitions, 10523 flow. Second operand 9 states and 210 transitions. [2024-06-21 20:10:02,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 685 transitions, 11978 flow [2024-06-21 20:10:09,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 685 transitions, 11592 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:10:09,570 INFO L231 Difference]: Finished difference. Result has 488 places, 660 transitions, 10574 flow [2024-06-21 20:10:09,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10137, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10574, PETRI_PLACES=488, PETRI_TRANSITIONS=660} [2024-06-21 20:10:09,570 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 447 predicate places. [2024-06-21 20:10:09,571 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 660 transitions, 10574 flow [2024-06-21 20:10:09,571 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) [2024-06-21 20:10:09,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:09,571 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] [2024-06-21 20:10:09,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 20:10:09,571 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:09,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:09,572 INFO L85 PathProgramCache]: Analyzing trace with hash 253992158, now seen corresponding path program 13 times [2024-06-21 20:10:09,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:09,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635530683] [2024-06-21 20:10:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:09,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:09,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:09,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635530683] [2024-06-21 20:10:09,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635530683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:09,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:09,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:10:09,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598357517] [2024-06-21 20:10:09,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:09,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:10:09,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:09,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:10:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:10:09,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:09,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 660 transitions, 10574 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) [2024-06-21 20:10:09,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:09,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:09,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:11,194 INFO L124 PetriNetUnfolderBase]: 3418/5695 cut-off events. [2024-06-21 20:10:11,195 INFO L125 PetriNetUnfolderBase]: For 1155453/1155453 co-relation queries the response was YES. [2024-06-21 20:10:11,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51061 conditions, 5695 events. 3418/5695 cut-off events. For 1155453/1155453 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38027 event pairs, 632 based on Foata normal form. 1/5687 useless extension candidates. Maximal degree in co-relation 50847. Up to 4908 conditions per place. [2024-06-21 20:10:11,267 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 491 selfloop transitions, 198 changer transitions 0/696 dead transitions. [2024-06-21 20:10:11,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 696 transitions, 12398 flow [2024-06-21 20:10:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:10:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:10:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-21 20:10:11,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403846153846154 [2024-06-21 20:10:11,268 INFO L175 Difference]: Start difference. First operand has 488 places, 660 transitions, 10574 flow. Second operand 13 states and 281 transitions. [2024-06-21 20:10:11,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 696 transitions, 12398 flow [2024-06-21 20:10:20,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 696 transitions, 11998 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:10:20,014 INFO L231 Difference]: Finished difference. Result has 495 places, 666 transitions, 10711 flow [2024-06-21 20:10:20,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10174, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10711, PETRI_PLACES=495, PETRI_TRANSITIONS=666} [2024-06-21 20:10:20,015 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 454 predicate places. [2024-06-21 20:10:20,015 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 666 transitions, 10711 flow [2024-06-21 20:10:20,015 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) [2024-06-21 20:10:20,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:20,015 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] [2024-06-21 20:10:20,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 20:10:20,016 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:20,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1512362900, now seen corresponding path program 14 times [2024-06-21 20:10:20,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:20,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842869053] [2024-06-21 20:10:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:20,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:20,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:20,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842869053] [2024-06-21 20:10:20,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842869053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:20,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:20,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:10:20,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419749364] [2024-06-21 20:10:20,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:20,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:10:20,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:20,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:10:20,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:10:20,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:20,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 666 transitions, 10711 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) [2024-06-21 20:10:20,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:20,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:20,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:21,547 INFO L124 PetriNetUnfolderBase]: 3423/5704 cut-off events. [2024-06-21 20:10:21,548 INFO L125 PetriNetUnfolderBase]: For 1172729/1172729 co-relation queries the response was YES. [2024-06-21 20:10:21,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51298 conditions, 5704 events. 3423/5704 cut-off events. For 1172729/1172729 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38089 event pairs, 632 based on Foata normal form. 1/5696 useless extension candidates. Maximal degree in co-relation 51082. Up to 4914 conditions per place. [2024-06-21 20:10:21,623 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 493 selfloop transitions, 201 changer transitions 0/701 dead transitions. [2024-06-21 20:10:21,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 701 transitions, 12503 flow [2024-06-21 20:10:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 20:10:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 20:10:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 317 transitions. [2024-06-21 20:10:21,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283333333333333 [2024-06-21 20:10:21,625 INFO L175 Difference]: Start difference. First operand has 495 places, 666 transitions, 10711 flow. Second operand 15 states and 317 transitions. [2024-06-21 20:10:21,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 701 transitions, 12503 flow [2024-06-21 20:10:29,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 701 transitions, 12033 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-06-21 20:10:29,047 INFO L231 Difference]: Finished difference. Result has 500 places, 669 transitions, 10715 flow [2024-06-21 20:10:29,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10268, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10715, PETRI_PLACES=500, PETRI_TRANSITIONS=669} [2024-06-21 20:10:29,047 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 459 predicate places. [2024-06-21 20:10:29,047 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 669 transitions, 10715 flow [2024-06-21 20:10:29,047 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) [2024-06-21 20:10:29,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:29,048 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] [2024-06-21 20:10:29,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 20:10:29,048 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:29,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:29,048 INFO L85 PathProgramCache]: Analyzing trace with hash 402740364, now seen corresponding path program 15 times [2024-06-21 20:10:29,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:29,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167104569] [2024-06-21 20:10:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:29,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:29,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:29,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167104569] [2024-06-21 20:10:29,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167104569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:29,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:29,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:10:29,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781231326] [2024-06-21 20:10:29,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:29,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:10:29,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:10:29,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:10:29,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:29,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 669 transitions, 10715 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) [2024-06-21 20:10:29,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:29,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:29,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:30,580 INFO L124 PetriNetUnfolderBase]: 3444/5740 cut-off events. [2024-06-21 20:10:30,580 INFO L125 PetriNetUnfolderBase]: For 1207511/1207511 co-relation queries the response was YES. [2024-06-21 20:10:30,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51867 conditions, 5740 events. 3444/5740 cut-off events. For 1207511/1207511 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38431 event pairs, 630 based on Foata normal form. 1/5732 useless extension candidates. Maximal degree in co-relation 51650. Up to 4920 conditions per place. [2024-06-21 20:10:30,659 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 484 selfloop transitions, 217 changer transitions 0/708 dead transitions. [2024-06-21 20:10:30,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 708 transitions, 12906 flow [2024-06-21 20:10:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:10:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:10:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-21 20:10:30,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604166666666667 [2024-06-21 20:10:30,660 INFO L175 Difference]: Start difference. First operand has 500 places, 669 transitions, 10715 flow. Second operand 12 states and 269 transitions. [2024-06-21 20:10:30,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 708 transitions, 12906 flow [2024-06-21 20:10:39,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 708 transitions, 12492 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-21 20:10:39,583 INFO L231 Difference]: Finished difference. Result has 500 places, 678 transitions, 10966 flow [2024-06-21 20:10:39,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10301, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10966, PETRI_PLACES=500, PETRI_TRANSITIONS=678} [2024-06-21 20:10:39,583 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 459 predicate places. [2024-06-21 20:10:39,583 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 678 transitions, 10966 flow [2024-06-21 20:10:39,583 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) [2024-06-21 20:10:39,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:39,584 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] [2024-06-21 20:10:39,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 20:10:39,584 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:39,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:39,584 INFO L85 PathProgramCache]: Analyzing trace with hash -227403260, now seen corresponding path program 16 times [2024-06-21 20:10:39,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:39,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929573105] [2024-06-21 20:10:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:39,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:39,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:39,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929573105] [2024-06-21 20:10:39,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929573105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:39,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:39,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:10:39,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508051369] [2024-06-21 20:10:39,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:39,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:10:39,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:39,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:10:39,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:10:39,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:39,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 678 transitions, 10966 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) [2024-06-21 20:10:39,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:39,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:39,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:41,126 INFO L124 PetriNetUnfolderBase]: 3441/5736 cut-off events. [2024-06-21 20:10:41,126 INFO L125 PetriNetUnfolderBase]: For 1216647/1216647 co-relation queries the response was YES. [2024-06-21 20:10:41,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51926 conditions, 5736 events. 3441/5736 cut-off events. For 1216647/1216647 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38386 event pairs, 630 based on Foata normal form. 1/5728 useless extension candidates. Maximal degree in co-relation 51707. Up to 4917 conditions per place. [2024-06-21 20:10:41,205 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 482 selfloop transitions, 220 changer transitions 0/709 dead transitions. [2024-06-21 20:10:41,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 709 transitions, 12976 flow [2024-06-21 20:10:41,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:10:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:10:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 286 transitions. [2024-06-21 20:10:41,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 20:10:41,207 INFO L175 Difference]: Start difference. First operand has 500 places, 678 transitions, 10966 flow. Second operand 13 states and 286 transitions. [2024-06-21 20:10:41,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 709 transitions, 12976 flow [2024-06-21 20:10:50,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 709 transitions, 12644 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 20:10:50,153 INFO L231 Difference]: Finished difference. Result has 506 places, 678 transitions, 11080 flow [2024-06-21 20:10:50,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10634, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11080, PETRI_PLACES=506, PETRI_TRANSITIONS=678} [2024-06-21 20:10:50,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-21 20:10:50,153 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 678 transitions, 11080 flow [2024-06-21 20:10:50,154 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) [2024-06-21 20:10:50,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:50,154 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] [2024-06-21 20:10:50,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 20:10:50,154 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:50,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:50,154 INFO L85 PathProgramCache]: Analyzing trace with hash -227587400, now seen corresponding path program 17 times [2024-06-21 20:10:50,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:50,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48136752] [2024-06-21 20:10:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:50,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:50,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:50,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48136752] [2024-06-21 20:10:50,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48136752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:50,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:50,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:10:50,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484810664] [2024-06-21 20:10:50,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:50,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:10:50,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:50,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:10:50,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:10:50,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:50,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 678 transitions, 11080 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) [2024-06-21 20:10:50,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:50,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:50,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:51,692 INFO L124 PetriNetUnfolderBase]: 3438/5732 cut-off events. [2024-06-21 20:10:51,692 INFO L125 PetriNetUnfolderBase]: For 1224038/1224038 co-relation queries the response was YES. [2024-06-21 20:10:51,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52214 conditions, 5732 events. 3438/5732 cut-off events. For 1224038/1224038 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38391 event pairs, 630 based on Foata normal form. 1/5724 useless extension candidates. Maximal degree in co-relation 51993. Up to 4914 conditions per place. [2024-06-21 20:10:51,772 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 485 selfloop transitions, 217 changer transitions 0/709 dead transitions. [2024-06-21 20:10:51,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 709 transitions, 12826 flow [2024-06-21 20:10:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:10:51,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:10:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 306 transitions. [2024-06-21 20:10:51,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5464285714285714 [2024-06-21 20:10:51,773 INFO L175 Difference]: Start difference. First operand has 506 places, 678 transitions, 11080 flow. Second operand 14 states and 306 transitions. [2024-06-21 20:10:51,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 709 transitions, 12826 flow [2024-06-21 20:10:59,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 709 transitions, 12346 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-21 20:10:59,810 INFO L231 Difference]: Finished difference. Result has 508 places, 678 transitions, 11040 flow [2024-06-21 20:10:59,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10600, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11040, PETRI_PLACES=508, PETRI_TRANSITIONS=678} [2024-06-21 20:10:59,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 467 predicate places. [2024-06-21 20:10:59,810 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 678 transitions, 11040 flow [2024-06-21 20:10:59,810 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) [2024-06-21 20:10:59,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:59,811 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] [2024-06-21 20:10:59,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 20:10:59,811 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:59,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:59,811 INFO L85 PathProgramCache]: Analyzing trace with hash -227581820, now seen corresponding path program 18 times [2024-06-21 20:10:59,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:59,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535367439] [2024-06-21 20:10:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:59,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:59,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535367439] [2024-06-21 20:10:59,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535367439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:59,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:59,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:10:59,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744302806] [2024-06-21 20:10:59,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:59,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:10:59,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:59,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:10:59,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:10:59,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:59,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 678 transitions, 11040 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) [2024-06-21 20:10:59,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:59,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:59,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:01,343 INFO L124 PetriNetUnfolderBase]: 3435/5726 cut-off events. [2024-06-21 20:11:01,344 INFO L125 PetriNetUnfolderBase]: For 1232326/1232326 co-relation queries the response was YES. [2024-06-21 20:11:01,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52129 conditions, 5726 events. 3435/5726 cut-off events. For 1232326/1232326 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38334 event pairs, 633 based on Foata normal form. 1/5718 useless extension candidates. Maximal degree in co-relation 51908. Up to 4941 conditions per place. [2024-06-21 20:11:01,427 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 508 selfloop transitions, 190 changer transitions 0/705 dead transitions. [2024-06-21 20:11:01,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 705 transitions, 12502 flow [2024-06-21 20:11:01,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:11:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:11:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-21 20:11:01,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-06-21 20:11:01,428 INFO L175 Difference]: Start difference. First operand has 508 places, 678 transitions, 11040 flow. Second operand 11 states and 247 transitions. [2024-06-21 20:11:01,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 705 transitions, 12502 flow [2024-06-21 20:11:09,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 705 transitions, 12036 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-21 20:11:09,192 INFO L231 Difference]: Finished difference. Result has 506 places, 678 transitions, 10960 flow [2024-06-21 20:11:09,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10574, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10960, PETRI_PLACES=506, PETRI_TRANSITIONS=678} [2024-06-21 20:11:09,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-21 20:11:09,193 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 678 transitions, 10960 flow [2024-06-21 20:11:09,193 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) [2024-06-21 20:11:09,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:09,194 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] [2024-06-21 20:11:09,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 20:11:09,194 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:09,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:09,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1341761163, now seen corresponding path program 2 times [2024-06-21 20:11:09,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:09,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099081468] [2024-06-21 20:11:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:09,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:09,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:09,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099081468] [2024-06-21 20:11:09,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099081468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:09,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:09,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:11:09,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030476032] [2024-06-21 20:11:09,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:09,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:11:09,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:09,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:11:09,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:11:09,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:09,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 678 transitions, 10960 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:09,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:09,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:09,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:10,670 INFO L124 PetriNetUnfolderBase]: 3443/5745 cut-off events. [2024-06-21 20:11:10,670 INFO L125 PetriNetUnfolderBase]: For 1258771/1258771 co-relation queries the response was YES. [2024-06-21 20:11:10,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52289 conditions, 5745 events. 3443/5745 cut-off events. For 1258771/1258771 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 38540 event pairs, 611 based on Foata normal form. 2/5738 useless extension candidates. Maximal degree in co-relation 52067. Up to 5116 conditions per place. [2024-06-21 20:11:10,755 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 625 selfloop transitions, 68 changer transitions 0/700 dead transitions. [2024-06-21 20:11:10,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 700 transitions, 12430 flow [2024-06-21 20:11:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:11:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:11:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 20:11:10,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 20:11:10,756 INFO L175 Difference]: Start difference. First operand has 506 places, 678 transitions, 10960 flow. Second operand 9 states and 198 transitions. [2024-06-21 20:11:10,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 700 transitions, 12430 flow [2024-06-21 20:11:18,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 700 transitions, 12034 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 20:11:18,900 INFO L231 Difference]: Finished difference. Result has 504 places, 680 transitions, 10745 flow [2024-06-21 20:11:18,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10564, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10745, PETRI_PLACES=504, PETRI_TRANSITIONS=680} [2024-06-21 20:11:18,901 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 463 predicate places. [2024-06-21 20:11:18,901 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 680 transitions, 10745 flow [2024-06-21 20:11:18,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:18,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:18,901 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] [2024-06-21 20:11:18,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 20:11:18,901 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:18,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:18,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1927470272, now seen corresponding path program 19 times [2024-06-21 20:11:18,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:18,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607801752] [2024-06-21 20:11:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:18,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:18,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:18,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607801752] [2024-06-21 20:11:18,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607801752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:18,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:18,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:11:18,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144883982] [2024-06-21 20:11:18,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:18,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:11:18,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:18,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:11:18,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:11:19,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:19,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 680 transitions, 10745 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) [2024-06-21 20:11:19,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:19,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:19,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:20,382 INFO L124 PetriNetUnfolderBase]: 3448/5747 cut-off events. [2024-06-21 20:11:20,383 INFO L125 PetriNetUnfolderBase]: For 1266601/1266601 co-relation queries the response was YES. [2024-06-21 20:11:20,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52220 conditions, 5747 events. 3448/5747 cut-off events. For 1266601/1266601 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 38460 event pairs, 633 based on Foata normal form. 1/5739 useless extension candidates. Maximal degree in co-relation 51997. Up to 4999 conditions per place. [2024-06-21 20:11:20,467 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 537 selfloop transitions, 158 changer transitions 0/702 dead transitions. [2024-06-21 20:11:20,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 702 transitions, 12244 flow [2024-06-21 20:11:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:11:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:11:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 20:11:20,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-21 20:11:20,468 INFO L175 Difference]: Start difference. First operand has 504 places, 680 transitions, 10745 flow. Second operand 9 states and 203 transitions. [2024-06-21 20:11:20,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 702 transitions, 12244 flow [2024-06-21 20:11:29,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 702 transitions, 12087 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:11:29,412 INFO L231 Difference]: Finished difference. Result has 506 places, 683 transitions, 10979 flow [2024-06-21 20:11:29,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10588, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10979, PETRI_PLACES=506, PETRI_TRANSITIONS=683} [2024-06-21 20:11:29,412 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-21 20:11:29,412 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 683 transitions, 10979 flow [2024-06-21 20:11:29,412 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) [2024-06-21 20:11:29,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:29,413 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] [2024-06-21 20:11:29,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 20:11:29,413 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:29,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1306770924, now seen corresponding path program 20 times [2024-06-21 20:11:29,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:29,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243372818] [2024-06-21 20:11:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:29,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:29,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:29,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243372818] [2024-06-21 20:11:29,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243372818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:29,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:29,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:11:29,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951094210] [2024-06-21 20:11:29,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:29,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:11:29,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:29,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:11:29,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:11:29,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:29,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 683 transitions, 10979 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) [2024-06-21 20:11:29,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:29,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:29,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:30,888 INFO L124 PetriNetUnfolderBase]: 3469/5789 cut-off events. [2024-06-21 20:11:30,888 INFO L125 PetriNetUnfolderBase]: For 1305036/1305036 co-relation queries the response was YES. [2024-06-21 20:11:30,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53077 conditions, 5789 events. 3469/5789 cut-off events. For 1305036/1305036 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 38872 event pairs, 623 based on Foata normal form. 1/5781 useless extension candidates. Maximal degree in co-relation 52853. Up to 5003 conditions per place. [2024-06-21 20:11:30,974 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 537 selfloop transitions, 171 changer transitions 0/715 dead transitions. [2024-06-21 20:11:30,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 715 transitions, 13208 flow [2024-06-21 20:11:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:11:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:11:30,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-21 20:11:30,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-21 20:11:30,975 INFO L175 Difference]: Start difference. First operand has 506 places, 683 transitions, 10979 flow. Second operand 11 states and 245 transitions. [2024-06-21 20:11:30,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 715 transitions, 13208 flow [2024-06-21 20:11:40,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 715 transitions, 12854 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 20:11:40,085 INFO L231 Difference]: Finished difference. Result has 511 places, 692 transitions, 11215 flow [2024-06-21 20:11:40,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10625, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11215, PETRI_PLACES=511, PETRI_TRANSITIONS=692} [2024-06-21 20:11:40,085 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 470 predicate places. [2024-06-21 20:11:40,085 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 692 transitions, 11215 flow [2024-06-21 20:11:40,085 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) [2024-06-21 20:11:40,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:40,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:11:40,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 20:11:40,086 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:40,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:40,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1918179690, now seen corresponding path program 21 times [2024-06-21 20:11:40,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:40,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856520525] [2024-06-21 20:11:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:40,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:40,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:40,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856520525] [2024-06-21 20:11:40,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856520525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:40,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:40,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:11:40,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246579761] [2024-06-21 20:11:40,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:40,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:11:40,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:40,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:11:40,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:11:40,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:40,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 692 transitions, 11215 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) [2024-06-21 20:11:40,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:40,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:40,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:41,595 INFO L124 PetriNetUnfolderBase]: 3474/5791 cut-off events. [2024-06-21 20:11:41,595 INFO L125 PetriNetUnfolderBase]: For 1324672/1324672 co-relation queries the response was YES. [2024-06-21 20:11:41,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53305 conditions, 5791 events. 3474/5791 cut-off events. For 1324672/1324672 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 38895 event pairs, 667 based on Foata normal form. 1/5777 useless extension candidates. Maximal degree in co-relation 53079. Up to 4540 conditions per place. [2024-06-21 20:11:41,681 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 426 changer transitions 0/721 dead transitions. [2024-06-21 20:11:41,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 721 transitions, 14141 flow [2024-06-21 20:11:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:11:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:11:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-21 20:11:41,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:11:41,683 INFO L175 Difference]: Start difference. First operand has 511 places, 692 transitions, 11215 flow. Second operand 11 states and 253 transitions. [2024-06-21 20:11:41,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 721 transitions, 14141 flow [2024-06-21 20:11:50,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 721 transitions, 13871 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 20:11:50,442 INFO L231 Difference]: Finished difference. Result has 516 places, 695 transitions, 11851 flow [2024-06-21 20:11:50,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10945, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11851, PETRI_PLACES=516, PETRI_TRANSITIONS=695} [2024-06-21 20:11:50,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 475 predicate places. [2024-06-21 20:11:50,443 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 695 transitions, 11851 flow [2024-06-21 20:11:50,443 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) [2024-06-21 20:11:50,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:50,443 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] [2024-06-21 20:11:50,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 20:11:50,443 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:50,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1802715540, now seen corresponding path program 22 times [2024-06-21 20:11:50,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:50,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317102358] [2024-06-21 20:11:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:50,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:50,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:50,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317102358] [2024-06-21 20:11:50,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317102358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:50,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:50,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:11:50,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731619330] [2024-06-21 20:11:50,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:50,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:11:50,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:11:50,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:11:50,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:50,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 695 transitions, 11851 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) [2024-06-21 20:11:50,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:50,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:50,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:52,235 INFO L124 PetriNetUnfolderBase]: 3479/5807 cut-off events. [2024-06-21 20:11:52,235 INFO L125 PetriNetUnfolderBase]: For 1344440/1344440 co-relation queries the response was YES. [2024-06-21 20:11:52,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54361 conditions, 5807 events. 3479/5807 cut-off events. For 1344440/1344440 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 39018 event pairs, 623 based on Foata normal form. 1/5799 useless extension candidates. Maximal degree in co-relation 54133. Up to 5016 conditions per place. [2024-06-21 20:11:52,314 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 541 selfloop transitions, 174 changer transitions 0/722 dead transitions. [2024-06-21 20:11:52,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 722 transitions, 13961 flow [2024-06-21 20:11:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:11:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:11:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-21 20:11:52,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479166666666667 [2024-06-21 20:11:52,315 INFO L175 Difference]: Start difference. First operand has 516 places, 695 transitions, 11851 flow. Second operand 12 states and 263 transitions. [2024-06-21 20:11:52,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 722 transitions, 13961 flow [2024-06-21 20:12:02,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 722 transitions, 12768 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-21 20:12:02,079 INFO L231 Difference]: Finished difference. Result has 519 places, 698 transitions, 11076 flow [2024-06-21 20:12:02,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10664, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11076, PETRI_PLACES=519, PETRI_TRANSITIONS=698} [2024-06-21 20:12:02,080 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 478 predicate places. [2024-06-21 20:12:02,080 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 698 transitions, 11076 flow [2024-06-21 20:12:02,080 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) [2024-06-21 20:12:02,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:02,080 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] [2024-06-21 20:12:02,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 20:12:02,081 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:02,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1422056514, now seen corresponding path program 23 times [2024-06-21 20:12:02,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:02,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021377355] [2024-06-21 20:12:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:02,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:02,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:02,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021377355] [2024-06-21 20:12:02,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021377355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:02,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:02,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:12:02,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644759844] [2024-06-21 20:12:02,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:02,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:12:02,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:02,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:12:02,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:12:02,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:12:02,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 698 transitions, 11076 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) [2024-06-21 20:12:02,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:02,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:12:02,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:03,553 INFO L124 PetriNetUnfolderBase]: 3484/5783 cut-off events. [2024-06-21 20:12:03,553 INFO L125 PetriNetUnfolderBase]: For 1357759/1357759 co-relation queries the response was YES. [2024-06-21 20:12:03,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53499 conditions, 5783 events. 3484/5783 cut-off events. For 1357759/1357759 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 38601 event pairs, 712 based on Foata normal form. 1/5769 useless extension candidates. Maximal degree in co-relation 53272. Up to 4552 conditions per place. [2024-06-21 20:12:03,639 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 422 changer transitions 0/722 dead transitions. [2024-06-21 20:12:03,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 722 transitions, 13154 flow [2024-06-21 20:12:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:12:03,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:12:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 20:12:03,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:12:03,641 INFO L175 Difference]: Start difference. First operand has 519 places, 698 transitions, 11076 flow. Second operand 9 states and 210 transitions. [2024-06-21 20:12:03,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 722 transitions, 13154 flow [2024-06-21 20:12:13,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 722 transitions, 12760 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 20:12:13,239 INFO L231 Difference]: Finished difference. Result has 518 places, 701 transitions, 11566 flow [2024-06-21 20:12:13,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10682, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11566, PETRI_PLACES=518, PETRI_TRANSITIONS=701} [2024-06-21 20:12:13,240 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 477 predicate places. [2024-06-21 20:12:13,240 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 701 transitions, 11566 flow [2024-06-21 20:12:13,240 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) [2024-06-21 20:12:13,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:13,240 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] [2024-06-21 20:12:13,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 20:12:13,241 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:13,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:13,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1795575162, now seen corresponding path program 24 times [2024-06-21 20:12:13,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:13,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533090800] [2024-06-21 20:12:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:13,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:13,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:13,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533090800] [2024-06-21 20:12:13,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533090800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:13,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:13,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:12:13,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739917170] [2024-06-21 20:12:13,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:13,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:12:13,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:12:13,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:12:13,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:12:13,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 701 transitions, 11566 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) [2024-06-21 20:12:13,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:13,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:12:13,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:15,082 INFO L124 PetriNetUnfolderBase]: 3497/5807 cut-off events. [2024-06-21 20:12:15,083 INFO L125 PetriNetUnfolderBase]: For 1389566/1389566 co-relation queries the response was YES. [2024-06-21 20:12:15,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54469 conditions, 5807 events. 3497/5807 cut-off events. For 1389566/1389566 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 38865 event pairs, 710 based on Foata normal form. 1/5793 useless extension candidates. Maximal degree in co-relation 54241. Up to 4567 conditions per place. [2024-06-21 20:12:15,171 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 430 changer transitions 0/730 dead transitions. [2024-06-21 20:12:15,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 730 transitions, 14019 flow [2024-06-21 20:12:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:12:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:12:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-21 20:12:15,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:12:15,173 INFO L175 Difference]: Start difference. First operand has 518 places, 701 transitions, 11566 flow. Second operand 10 states and 230 transitions. [2024-06-21 20:12:15,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 730 transitions, 14019 flow [2024-06-21 20:12:24,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 730 transitions, 13430 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:12:24,729 INFO L231 Difference]: Finished difference. Result has 522 places, 707 transitions, 11944 flow [2024-06-21 20:12:24,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10983, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11944, PETRI_PLACES=522, PETRI_TRANSITIONS=707} [2024-06-21 20:12:24,729 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 481 predicate places. [2024-06-21 20:12:24,729 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 707 transitions, 11944 flow [2024-06-21 20:12:24,729 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) [2024-06-21 20:12:24,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:24,730 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] [2024-06-21 20:12:24,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 20:12:24,730 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:24,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:24,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1341756606, now seen corresponding path program 25 times [2024-06-21 20:12:24,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:24,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824174056] [2024-06-21 20:12:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:24,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:24,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:24,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824174056] [2024-06-21 20:12:24,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824174056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:24,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:24,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:12:24,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092109703] [2024-06-21 20:12:24,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:24,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:12:24,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:24,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:12:24,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:12:24,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:12:24,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 707 transitions, 11944 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) [2024-06-21 20:12:24,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:24,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:12:24,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:26,570 INFO L124 PetriNetUnfolderBase]: 3502/5847 cut-off events. [2024-06-21 20:12:26,570 INFO L125 PetriNetUnfolderBase]: For 1410123/1410123 co-relation queries the response was YES. [2024-06-21 20:12:26,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54818 conditions, 5847 events. 3502/5847 cut-off events. For 1410123/1410123 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 39385 event pairs, 623 based on Foata normal form. 1/5839 useless extension candidates. Maximal degree in co-relation 54588. Up to 5047 conditions per place. [2024-06-21 20:12:26,647 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 548 selfloop transitions, 179 changer transitions 0/734 dead transitions. [2024-06-21 20:12:26,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 734 transitions, 13801 flow [2024-06-21 20:12:26,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:12:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:12:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-06-21 20:12:26,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365384615384615 [2024-06-21 20:12:26,648 INFO L175 Difference]: Start difference. First operand has 522 places, 707 transitions, 11944 flow. Second operand 13 states and 279 transitions. [2024-06-21 20:12:26,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 734 transitions, 13801 flow [2024-06-21 20:12:37,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 734 transitions, 12919 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:12:37,379 INFO L231 Difference]: Finished difference. Result has 528 places, 710 transitions, 11487 flow [2024-06-21 20:12:37,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11068, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11487, PETRI_PLACES=528, PETRI_TRANSITIONS=710} [2024-06-21 20:12:37,379 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 487 predicate places. [2024-06-21 20:12:37,379 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 710 transitions, 11487 flow [2024-06-21 20:12:37,380 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) [2024-06-21 20:12:37,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:37,384 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] [2024-06-21 20:12:37,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 20:12:37,385 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:37,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:37,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1306413804, now seen corresponding path program 26 times [2024-06-21 20:12:37,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:37,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214137976] [2024-06-21 20:12:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:37,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:37,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:37,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214137976] [2024-06-21 20:12:37,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214137976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:37,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:37,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:12:37,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236053944] [2024-06-21 20:12:37,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:37,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:12:37,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:37,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:12:37,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:12:37,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:12:37,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 710 transitions, 11487 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) [2024-06-21 20:12:37,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:37,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:12:37,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:39,192 INFO L124 PetriNetUnfolderBase]: 3515/5863 cut-off events. [2024-06-21 20:12:39,192 INFO L125 PetriNetUnfolderBase]: For 1436350/1436350 co-relation queries the response was YES. [2024-06-21 20:12:39,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54610 conditions, 5863 events. 3515/5863 cut-off events. For 1436350/1436350 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 39434 event pairs, 632 based on Foata normal form. 1/5855 useless extension candidates. Maximal degree in co-relation 54379. Up to 5085 conditions per place. [2024-06-21 20:12:39,396 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 567 selfloop transitions, 165 changer transitions 0/739 dead transitions. [2024-06-21 20:12:39,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 739 transitions, 13412 flow [2024-06-21 20:12:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:12:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:12:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-21 20:12:39,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-21 20:12:39,397 INFO L175 Difference]: Start difference. First operand has 528 places, 710 transitions, 11487 flow. Second operand 12 states and 258 transitions. [2024-06-21 20:12:39,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 739 transitions, 13412 flow [2024-06-21 20:12:49,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 739 transitions, 13052 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-21 20:12:49,216 INFO L231 Difference]: Finished difference. Result has 531 places, 716 transitions, 11602 flow [2024-06-21 20:12:49,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11133, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11602, PETRI_PLACES=531, PETRI_TRANSITIONS=716} [2024-06-21 20:12:49,217 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 490 predicate places. [2024-06-21 20:12:49,217 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 716 transitions, 11602 flow [2024-06-21 20:12:49,217 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) [2024-06-21 20:12:49,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:49,217 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] [2024-06-21 20:12:49,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 20:12:49,218 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:49,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:49,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1434266048, now seen corresponding path program 27 times [2024-06-21 20:12:49,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:49,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26445500] [2024-06-21 20:12:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:49,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:49,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:49,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26445500] [2024-06-21 20:12:49,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26445500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:49,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:49,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:12:49,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530593783] [2024-06-21 20:12:49,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:49,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:12:49,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:49,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:12:49,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:12:49,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:12:49,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 716 transitions, 11602 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) [2024-06-21 20:12:49,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:49,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:12:49,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:51,108 INFO L124 PetriNetUnfolderBase]: 3512/5862 cut-off events. [2024-06-21 20:12:51,108 INFO L125 PetriNetUnfolderBase]: For 1445003/1445003 co-relation queries the response was YES. [2024-06-21 20:12:51,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54558 conditions, 5862 events. 3512/5862 cut-off events. For 1445003/1445003 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 39434 event pairs, 629 based on Foata normal form. 1/5854 useless extension candidates. Maximal degree in co-relation 54325. Up to 5093 conditions per place. [2024-06-21 20:12:51,184 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 577 selfloop transitions, 155 changer transitions 0/739 dead transitions. [2024-06-21 20:12:51,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 739 transitions, 13410 flow [2024-06-21 20:12:51,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:12:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:12:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-21 20:12:51,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-06-21 20:12:51,185 INFO L175 Difference]: Start difference. First operand has 531 places, 716 transitions, 11602 flow. Second operand 12 states and 257 transitions. [2024-06-21 20:12:51,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 739 transitions, 13410 flow [2024-06-21 20:13:01,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 739 transitions, 13048 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 20:13:01,436 INFO L231 Difference]: Finished difference. Result has 534 places, 716 transitions, 11556 flow [2024-06-21 20:13:01,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11240, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11556, PETRI_PLACES=534, PETRI_TRANSITIONS=716} [2024-06-21 20:13:01,437 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 493 predicate places. [2024-06-21 20:13:01,437 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 716 transitions, 11556 flow [2024-06-21 20:13:01,437 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) [2024-06-21 20:13:01,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:01,437 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] [2024-06-21 20:13:01,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 20:13:01,438 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:01,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:01,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1574635830, now seen corresponding path program 28 times [2024-06-21 20:13:01,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:01,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188469538] [2024-06-21 20:13:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:01,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:01,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:01,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188469538] [2024-06-21 20:13:01,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188469538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:01,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:01,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:13:01,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085214136] [2024-06-21 20:13:01,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:01,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:13:01,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:01,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:13:01,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:13:01,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:13:01,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 716 transitions, 11556 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) [2024-06-21 20:13:01,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:01,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:13:01,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:03,307 INFO L124 PetriNetUnfolderBase]: 3509/5858 cut-off events. [2024-06-21 20:13:03,307 INFO L125 PetriNetUnfolderBase]: For 1453044/1453044 co-relation queries the response was YES. [2024-06-21 20:13:03,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54461 conditions, 5858 events. 3509/5858 cut-off events. For 1453044/1453044 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 39433 event pairs, 629 based on Foata normal form. 1/5850 useless extension candidates. Maximal degree in co-relation 54227. Up to 5090 conditions per place. [2024-06-21 20:13:03,395 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 575 selfloop transitions, 155 changer transitions 0/737 dead transitions. [2024-06-21 20:13:03,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 737 transitions, 13066 flow [2024-06-21 20:13:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:13:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:13:03,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-21 20:13:03,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-21 20:13:03,396 INFO L175 Difference]: Start difference. First operand has 534 places, 716 transitions, 11556 flow. Second operand 11 states and 239 transitions. [2024-06-21 20:13:03,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 737 transitions, 13066 flow [2024-06-21 20:13:13,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 737 transitions, 12658 flow, removed 19 selfloop flow, removed 13 redundant places. [2024-06-21 20:13:13,879 INFO L231 Difference]: Finished difference. Result has 532 places, 716 transitions, 11464 flow [2024-06-21 20:13:13,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11148, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11464, PETRI_PLACES=532, PETRI_TRANSITIONS=716} [2024-06-21 20:13:13,880 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 491 predicate places. [2024-06-21 20:13:13,880 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 716 transitions, 11464 flow [2024-06-21 20:13:13,880 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) [2024-06-21 20:13:13,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:13,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:13,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 20:13:13,880 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:13,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:13,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1082237304, now seen corresponding path program 29 times [2024-06-21 20:13:13,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:13,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652744831] [2024-06-21 20:13:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:13,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:13,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:13,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652744831] [2024-06-21 20:13:13,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652744831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:13,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:13,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:13:13,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521346587] [2024-06-21 20:13:13,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:13,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:13:13,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:13,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:13:13,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:13:14,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:13:14,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 716 transitions, 11464 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) [2024-06-21 20:13:14,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:14,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:13:14,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:15,698 INFO L124 PetriNetUnfolderBase]: 3522/5865 cut-off events. [2024-06-21 20:13:15,699 INFO L125 PetriNetUnfolderBase]: For 1484548/1484548 co-relation queries the response was YES. [2024-06-21 20:13:15,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54799 conditions, 5865 events. 3522/5865 cut-off events. For 1484548/1484548 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 39468 event pairs, 697 based on Foata normal form. 1/5851 useless extension candidates. Maximal degree in co-relation 54565. Up to 4597 conditions per place. [2024-06-21 20:13:15,777 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 286 selfloop transitions, 454 changer transitions 0/747 dead transitions. [2024-06-21 20:13:15,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 747 transitions, 14294 flow [2024-06-21 20:13:15,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:13:15,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:13:15,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-21 20:13:15,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659090909090909 [2024-06-21 20:13:15,779 INFO L175 Difference]: Start difference. First operand has 532 places, 716 transitions, 11464 flow. Second operand 11 states and 249 transitions. [2024-06-21 20:13:15,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 747 transitions, 14294 flow [2024-06-21 20:13:26,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 747 transitions, 13972 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 20:13:26,052 INFO L231 Difference]: Finished difference. Result has 533 places, 722 transitions, 12172 flow [2024-06-21 20:13:26,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11142, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12172, PETRI_PLACES=533, PETRI_TRANSITIONS=722} [2024-06-21 20:13:26,052 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 492 predicate places. [2024-06-21 20:13:26,052 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 722 transitions, 12172 flow [2024-06-21 20:13:26,052 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) [2024-06-21 20:13:26,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:26,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:26,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 20:13:26,053 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:26,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:26,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1927816232, now seen corresponding path program 30 times [2024-06-21 20:13:26,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:26,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755227224] [2024-06-21 20:13:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:26,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:26,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:26,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755227224] [2024-06-21 20:13:26,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755227224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:26,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:26,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:13:26,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629901778] [2024-06-21 20:13:26,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:26,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:13:26,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:26,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:13:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:13:26,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:13:26,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 722 transitions, 12172 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) [2024-06-21 20:13:26,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:26,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:13:26,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:27,827 INFO L124 PetriNetUnfolderBase]: 3519/5873 cut-off events. [2024-06-21 20:13:27,827 INFO L125 PetriNetUnfolderBase]: For 1495170/1495170 co-relation queries the response was YES. [2024-06-21 20:13:28,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55469 conditions, 5873 events. 3519/5873 cut-off events. For 1495170/1495170 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39524 event pairs, 632 based on Foata normal form. 1/5865 useless extension candidates. Maximal degree in co-relation 55234. Up to 5092 conditions per place. [2024-06-21 20:13:28,035 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 574 selfloop transitions, 165 changer transitions 0/746 dead transitions. [2024-06-21 20:13:28,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 746 transitions, 13706 flow [2024-06-21 20:13:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:13:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:13:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 293 transitions. [2024-06-21 20:13:28,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232142857142857 [2024-06-21 20:13:28,036 INFO L175 Difference]: Start difference. First operand has 533 places, 722 transitions, 12172 flow. Second operand 14 states and 293 transitions. [2024-06-21 20:13:28,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 746 transitions, 13706 flow [2024-06-21 20:13:38,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 746 transitions, 12452 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 20:13:38,890 INFO L231 Difference]: Finished difference. Result has 537 places, 722 transitions, 11254 flow [2024-06-21 20:13:38,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10918, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11254, PETRI_PLACES=537, PETRI_TRANSITIONS=722} [2024-06-21 20:13:38,890 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 496 predicate places. [2024-06-21 20:13:38,891 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 722 transitions, 11254 flow [2024-06-21 20:13:38,891 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) [2024-06-21 20:13:38,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:38,891 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] [2024-06-21 20:13:38,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 20:13:38,891 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:38,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:38,891 INFO L85 PathProgramCache]: Analyzing trace with hash 934643355, now seen corresponding path program 13 times [2024-06-21 20:13:38,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:38,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874603335] [2024-06-21 20:13:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:38,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:38,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:38,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874603335] [2024-06-21 20:13:38,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874603335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:38,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:38,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:13:38,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564645815] [2024-06-21 20:13:38,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:38,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:13:38,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:38,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:13:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:13:39,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:13:39,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 722 transitions, 11254 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:39,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:39,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:13:39,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:40,754 INFO L124 PetriNetUnfolderBase]: 3496/5843 cut-off events. [2024-06-21 20:13:40,754 INFO L125 PetriNetUnfolderBase]: For 1495912/1495912 co-relation queries the response was YES. [2024-06-21 20:13:40,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53060 conditions, 5843 events. 3496/5843 cut-off events. For 1495912/1495912 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39347 event pairs, 468 based on Foata normal form. 10/5844 useless extension candidates. Maximal degree in co-relation 52825. Up to 4574 conditions per place. [2024-06-21 20:13:40,829 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 564 selfloop transitions, 190 changer transitions 0/761 dead transitions. [2024-06-21 20:13:40,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 761 transitions, 13210 flow [2024-06-21 20:13:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:13:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:13:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 20:13:40,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:13:40,830 INFO L175 Difference]: Start difference. First operand has 537 places, 722 transitions, 11254 flow. Second operand 8 states and 204 transitions. [2024-06-21 20:13:40,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 761 transitions, 13210 flow [2024-06-21 20:13:52,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 761 transitions, 12850 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-21 20:13:52,015 INFO L231 Difference]: Finished difference. Result has 532 places, 722 transitions, 11285 flow [2024-06-21 20:13:52,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10894, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11285, PETRI_PLACES=532, PETRI_TRANSITIONS=722} [2024-06-21 20:13:52,015 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 491 predicate places. [2024-06-21 20:13:52,016 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 722 transitions, 11285 flow [2024-06-21 20:13:52,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:52,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:52,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:52,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 20:13:52,016 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:13:52,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:52,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1007195051, now seen corresponding path program 14 times [2024-06-21 20:13:52,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:52,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034246602] [2024-06-21 20:13:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:52,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:52,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:52,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034246602] [2024-06-21 20:13:52,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034246602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:52,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:52,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:13:52,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369292964] [2024-06-21 20:13:52,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:52,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:13:52,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:13:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:13:52,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:13:52,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 722 transitions, 11285 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:52,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:52,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:13:52,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:54,057 INFO L124 PetriNetUnfolderBase]: 3473/5808 cut-off events. [2024-06-21 20:13:54,057 INFO L125 PetriNetUnfolderBase]: For 1407458/1407458 co-relation queries the response was YES. [2024-06-21 20:13:54,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51716 conditions, 5808 events. 3473/5808 cut-off events. For 1407458/1407458 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39155 event pairs, 592 based on Foata normal form. 10/5807 useless extension candidates. Maximal degree in co-relation 51480. Up to 4943 conditions per place. [2024-06-21 20:13:54,154 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 579 selfloop transitions, 167 changer transitions 0/753 dead transitions. [2024-06-21 20:13:54,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 753 transitions, 12881 flow [2024-06-21 20:13:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:13:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:13:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:13:54,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-21 20:13:54,156 INFO L175 Difference]: Start difference. First operand has 532 places, 722 transitions, 11285 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:13:54,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 753 transitions, 12881 flow [2024-06-21 20:14:04,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 753 transitions, 12418 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 20:14:04,449 INFO L231 Difference]: Finished difference. Result has 531 places, 722 transitions, 11168 flow [2024-06-21 20:14:04,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10822, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11168, PETRI_PLACES=531, PETRI_TRANSITIONS=722} [2024-06-21 20:14:04,449 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 490 predicate places. [2024-06-21 20:14:04,450 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 722 transitions, 11168 flow [2024-06-21 20:14:04,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:04,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:04,450 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] [2024-06-21 20:14:04,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 20:14:04,450 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:04,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:04,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1230101565, now seen corresponding path program 15 times [2024-06-21 20:14:04,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:04,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525758562] [2024-06-21 20:14:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:04,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:04,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:04,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525758562] [2024-06-21 20:14:04,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525758562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:04,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:04,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:04,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099719480] [2024-06-21 20:14:04,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:04,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:04,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:04,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:04,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:04,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:14:04,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 722 transitions, 11168 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:04,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:04,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:14:04,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:06,307 INFO L124 PetriNetUnfolderBase]: 3450/5775 cut-off events. [2024-06-21 20:14:06,307 INFO L125 PetriNetUnfolderBase]: For 1274447/1274447 co-relation queries the response was YES. [2024-06-21 20:14:06,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49484 conditions, 5775 events. 3450/5775 cut-off events. For 1274447/1274447 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 38985 event pairs, 583 based on Foata normal form. 10/5774 useless extension candidates. Maximal degree in co-relation 49249. Up to 4904 conditions per place. [2024-06-21 20:14:06,381 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 576 selfloop transitions, 172 changer transitions 0/755 dead transitions. [2024-06-21 20:14:06,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 755 transitions, 12772 flow [2024-06-21 20:14:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:14:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:14:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-21 20:14:06,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-21 20:14:06,383 INFO L175 Difference]: Start difference. First operand has 531 places, 722 transitions, 11168 flow. Second operand 10 states and 237 transitions. [2024-06-21 20:14:06,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 755 transitions, 12772 flow [2024-06-21 20:14:13,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 755 transitions, 12402 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 20:14:13,383 INFO L231 Difference]: Finished difference. Result has 532 places, 722 transitions, 11157 flow [2024-06-21 20:14:13,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10798, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11157, PETRI_PLACES=532, PETRI_TRANSITIONS=722} [2024-06-21 20:14:13,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 491 predicate places. [2024-06-21 20:14:13,384 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 722 transitions, 11157 flow [2024-06-21 20:14:13,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:13,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:13,384 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] [2024-06-21 20:14:13,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 20:14:13,384 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:13,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:13,385 INFO L85 PathProgramCache]: Analyzing trace with hash -224731045, now seen corresponding path program 16 times [2024-06-21 20:14:13,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:13,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720033445] [2024-06-21 20:14:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:13,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:13,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:13,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720033445] [2024-06-21 20:14:13,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720033445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:13,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:13,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:13,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430490663] [2024-06-21 20:14:13,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:13,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:13,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:13,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:13,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:13,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:14:13,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 722 transitions, 11157 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:13,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:13,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:14:13,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:15,221 INFO L124 PetriNetUnfolderBase]: 3577/5994 cut-off events. [2024-06-21 20:14:15,221 INFO L125 PetriNetUnfolderBase]: For 1609857/1609863 co-relation queries the response was YES. [2024-06-21 20:14:15,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50293 conditions, 5994 events. 3577/5994 cut-off events. For 1609857/1609863 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 40603 event pairs, 508 based on Foata normal form. 48/6039 useless extension candidates. Maximal degree in co-relation 50059. Up to 4911 conditions per place. [2024-06-21 20:14:15,300 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 661 selfloop transitions, 90 changer transitions 1/759 dead transitions. [2024-06-21 20:14:15,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 759 transitions, 12844 flow [2024-06-21 20:14:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:14:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:14:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 20:14:15,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678571428571428 [2024-06-21 20:14:15,301 INFO L175 Difference]: Start difference. First operand has 532 places, 722 transitions, 11157 flow. Second operand 7 states and 187 transitions. [2024-06-21 20:14:15,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 759 transitions, 12844 flow [2024-06-21 20:14:24,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 759 transitions, 12492 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 20:14:24,858 INFO L231 Difference]: Finished difference. Result has 529 places, 723 transitions, 11053 flow [2024-06-21 20:14:24,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10805, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11053, PETRI_PLACES=529, PETRI_TRANSITIONS=723} [2024-06-21 20:14:24,858 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 488 predicate places. [2024-06-21 20:14:24,858 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 723 transitions, 11053 flow [2024-06-21 20:14:24,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:24,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:24,859 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] [2024-06-21 20:14:24,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 20:14:24,859 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:24,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:24,859 INFO L85 PathProgramCache]: Analyzing trace with hash 998013081, now seen corresponding path program 17 times [2024-06-21 20:14:24,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:24,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156960374] [2024-06-21 20:14:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:24,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:24,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:24,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156960374] [2024-06-21 20:14:24,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156960374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:24,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:24,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:24,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328713911] [2024-06-21 20:14:24,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:24,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:24,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:24,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:24,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:25,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:14:25,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 723 transitions, 11053 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:25,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:25,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:14:25,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:26,689 INFO L124 PetriNetUnfolderBase]: 3590/6012 cut-off events. [2024-06-21 20:14:26,690 INFO L125 PetriNetUnfolderBase]: For 1218738/1218744 co-relation queries the response was YES. [2024-06-21 20:14:26,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50277 conditions, 6012 events. 3590/6012 cut-off events. For 1218738/1218744 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 40786 event pairs, 608 based on Foata normal form. 14/6018 useless extension candidates. Maximal degree in co-relation 50043. Up to 5296 conditions per place. [2024-06-21 20:14:26,777 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 674 selfloop transitions, 77 changer transitions 0/758 dead transitions. [2024-06-21 20:14:26,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 758 transitions, 12705 flow [2024-06-21 20:14:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:14:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:14:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:14:26,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-21 20:14:26,779 INFO L175 Difference]: Start difference. First operand has 529 places, 723 transitions, 11053 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:14:26,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 758 transitions, 12705 flow [2024-06-21 20:14:35,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 758 transitions, 12470 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 20:14:35,690 INFO L231 Difference]: Finished difference. Result has 531 places, 724 transitions, 11023 flow [2024-06-21 20:14:35,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10818, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11023, PETRI_PLACES=531, PETRI_TRANSITIONS=724} [2024-06-21 20:14:35,691 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 490 predicate places. [2024-06-21 20:14:35,691 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 724 transitions, 11023 flow [2024-06-21 20:14:35,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:35,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:35,691 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] [2024-06-21 20:14:35,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 20:14:35,692 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:35,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:35,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2084414977, now seen corresponding path program 18 times [2024-06-21 20:14:35,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:35,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395296064] [2024-06-21 20:14:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:35,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:35,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:35,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395296064] [2024-06-21 20:14:35,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395296064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:35,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:35,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:35,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937381753] [2024-06-21 20:14:35,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:35,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:35,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:35,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:35,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:35,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:14:35,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 724 transitions, 11023 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:35,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:35,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:14:35,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:37,538 INFO L124 PetriNetUnfolderBase]: 3613/6049 cut-off events. [2024-06-21 20:14:37,539 INFO L125 PetriNetUnfolderBase]: For 1211628/1211634 co-relation queries the response was YES. [2024-06-21 20:14:37,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50124 conditions, 6049 events. 3613/6049 cut-off events. For 1211628/1211634 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 41066 event pairs, 611 based on Foata normal form. 14/6055 useless extension candidates. Maximal degree in co-relation 49890. Up to 5192 conditions per place. [2024-06-21 20:14:37,619 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 613 selfloop transitions, 142 changer transitions 0/762 dead transitions. [2024-06-21 20:14:37,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 762 transitions, 12693 flow [2024-06-21 20:14:37,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:14:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:14:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 20:14:37,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646875 [2024-06-21 20:14:37,620 INFO L175 Difference]: Start difference. First operand has 531 places, 724 transitions, 11023 flow. Second operand 8 states and 207 transitions. [2024-06-21 20:14:37,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 762 transitions, 12693 flow [2024-06-21 20:14:47,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 762 transitions, 12494 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 20:14:47,849 INFO L231 Difference]: Finished difference. Result has 533 places, 725 transitions, 11161 flow [2024-06-21 20:14:47,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11161, PETRI_PLACES=533, PETRI_TRANSITIONS=725} [2024-06-21 20:14:47,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 492 predicate places. [2024-06-21 20:14:47,850 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 725 transitions, 11161 flow [2024-06-21 20:14:47,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:47,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:47,850 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] [2024-06-21 20:14:47,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 20:14:47,851 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:47,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:47,851 INFO L85 PathProgramCache]: Analyzing trace with hash -998751091, now seen corresponding path program 19 times [2024-06-21 20:14:47,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:47,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794164618] [2024-06-21 20:14:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:47,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:47,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:47,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794164618] [2024-06-21 20:14:47,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794164618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:47,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:47,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:47,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999508693] [2024-06-21 20:14:47,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:47,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:47,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:47,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:47,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:48,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:14:48,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 725 transitions, 11161 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:48,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:48,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:14:48,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:49,664 INFO L124 PetriNetUnfolderBase]: 3636/6091 cut-off events. [2024-06-21 20:14:49,665 INFO L125 PetriNetUnfolderBase]: For 1204737/1204743 co-relation queries the response was YES. [2024-06-21 20:14:49,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50373 conditions, 6091 events. 3636/6091 cut-off events. For 1204737/1204743 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 41397 event pairs, 480 based on Foata normal form. 14/6102 useless extension candidates. Maximal degree in co-relation 50138. Up to 4730 conditions per place. [2024-06-21 20:14:49,749 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 603 selfloop transitions, 159 changer transitions 0/769 dead transitions. [2024-06-21 20:14:49,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 769 transitions, 12899 flow [2024-06-21 20:14:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:14:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:14:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 20:14:49,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-06-21 20:14:49,750 INFO L175 Difference]: Start difference. First operand has 533 places, 725 transitions, 11161 flow. Second operand 8 states and 212 transitions. [2024-06-21 20:14:49,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 769 transitions, 12899 flow [2024-06-21 20:14:58,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 769 transitions, 12553 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-21 20:14:58,194 INFO L231 Difference]: Finished difference. Result has 532 places, 726 transitions, 11187 flow [2024-06-21 20:14:58,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10815, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11187, PETRI_PLACES=532, PETRI_TRANSITIONS=726} [2024-06-21 20:14:58,194 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 491 predicate places. [2024-06-21 20:14:58,195 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 726 transitions, 11187 flow [2024-06-21 20:14:58,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:58,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:58,195 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] [2024-06-21 20:14:58,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 20:14:58,195 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:14:58,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1230286263, now seen corresponding path program 3 times [2024-06-21 20:14:58,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:58,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594925528] [2024-06-21 20:14:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:58,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:58,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:58,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594925528] [2024-06-21 20:14:58,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594925528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:58,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:58,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:58,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530410550] [2024-06-21 20:14:58,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:58,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:58,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:58,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:58,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:14:58,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 726 transitions, 11187 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:58,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:58,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:14:58,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:59,910 INFO L124 PetriNetUnfolderBase]: 3631/6079 cut-off events. [2024-06-21 20:14:59,910 INFO L125 PetriNetUnfolderBase]: For 1068090/1068090 co-relation queries the response was YES. [2024-06-21 20:14:59,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49808 conditions, 6079 events. 3631/6079 cut-off events. For 1068090/1068090 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 41344 event pairs, 647 based on Foata normal form. 2/6072 useless extension candidates. Maximal degree in co-relation 49575. Up to 5410 conditions per place. [2024-06-21 20:14:59,988 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 666 selfloop transitions, 71 changer transitions 0/744 dead transitions. [2024-06-21 20:14:59,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 744 transitions, 12705 flow [2024-06-21 20:14:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:14:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:14:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 20:14:59,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-21 20:14:59,989 INFO L175 Difference]: Start difference. First operand has 532 places, 726 transitions, 11187 flow. Second operand 7 states and 162 transitions. [2024-06-21 20:14:59,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 744 transitions, 12705 flow [2024-06-21 20:15:09,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 744 transitions, 12346 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 20:15:09,943 INFO L231 Difference]: Finished difference. Result has 532 places, 726 transitions, 10981 flow [2024-06-21 20:15:09,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10828, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10981, PETRI_PLACES=532, PETRI_TRANSITIONS=726} [2024-06-21 20:15:09,944 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 491 predicate places. [2024-06-21 20:15:09,944 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 726 transitions, 10981 flow [2024-06-21 20:15:09,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:15:09,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:09,945 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] [2024-06-21 20:15:09,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 20:15:09,945 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:09,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:09,945 INFO L85 PathProgramCache]: Analyzing trace with hash 943224930, now seen corresponding path program 31 times [2024-06-21 20:15:09,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:09,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318416734] [2024-06-21 20:15:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:09,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:10,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:10,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318416734] [2024-06-21 20:15:10,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318416734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:10,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:10,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:15:10,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193221431] [2024-06-21 20:15:10,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:10,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:15:10,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:10,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:15:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:15:10,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:15:10,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 726 transitions, 10981 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) [2024-06-21 20:15:10,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:10,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:15:10,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:11,698 INFO L124 PetriNetUnfolderBase]: 3628/6068 cut-off events. [2024-06-21 20:15:11,698 INFO L125 PetriNetUnfolderBase]: For 1041529/1041529 co-relation queries the response was YES. [2024-06-21 20:15:11,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49034 conditions, 6068 events. 3628/6068 cut-off events. For 1041529/1041529 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 41226 event pairs, 669 based on Foata normal form. 1/6060 useless extension candidates. Maximal degree in co-relation 48801. Up to 4909 conditions per place. [2024-06-21 20:15:11,775 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 353 selfloop transitions, 396 changer transitions 0/756 dead transitions. [2024-06-21 20:15:11,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 756 transitions, 13145 flow [2024-06-21 20:15:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:15:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:15:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 20:15:11,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:15:11,776 INFO L175 Difference]: Start difference. First operand has 532 places, 726 transitions, 10981 flow. Second operand 9 states and 219 transitions. [2024-06-21 20:15:11,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 756 transitions, 13145 flow [2024-06-21 20:15:19,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 756 transitions, 12978 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:15:19,776 INFO L231 Difference]: Finished difference. Result has 536 places, 726 transitions, 11624 flow [2024-06-21 20:15:19,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10822, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11624, PETRI_PLACES=536, PETRI_TRANSITIONS=726} [2024-06-21 20:15:19,777 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2024-06-21 20:15:19,777 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 726 transitions, 11624 flow [2024-06-21 20:15:19,777 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) [2024-06-21 20:15:19,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:19,777 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] [2024-06-21 20:15:19,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 20:15:19,778 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:19,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:19,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1722942463, now seen corresponding path program 4 times [2024-06-21 20:15:19,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:19,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453990280] [2024-06-21 20:15:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:19,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:19,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:19,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453990280] [2024-06-21 20:15:19,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453990280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:19,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:19,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:15:19,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240174658] [2024-06-21 20:15:19,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:19,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:15:19,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:19,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:15:19,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:15:19,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:15:19,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 726 transitions, 11624 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) [2024-06-21 20:15:19,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:19,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:15:19,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:21,539 INFO L124 PetriNetUnfolderBase]: 3649/6096 cut-off events. [2024-06-21 20:15:21,539 INFO L125 PetriNetUnfolderBase]: For 1064401/1064401 co-relation queries the response was YES. [2024-06-21 20:15:21,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50254 conditions, 6096 events. 3649/6096 cut-off events. For 1064401/1064401 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 41409 event pairs, 642 based on Foata normal form. 2/6087 useless extension candidates. Maximal degree in co-relation 50020. Up to 5412 conditions per place. [2024-06-21 20:15:21,617 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 676 selfloop transitions, 70 changer transitions 0/753 dead transitions. [2024-06-21 20:15:21,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 753 transitions, 13563 flow [2024-06-21 20:15:21,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:15:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:15:21,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:15:21,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:15:21,619 INFO L175 Difference]: Start difference. First operand has 536 places, 726 transitions, 11624 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:15:21,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 753 transitions, 13563 flow [2024-06-21 20:15:29,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 753 transitions, 12939 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:15:29,962 INFO L231 Difference]: Finished difference. Result has 536 places, 731 transitions, 11262 flow [2024-06-21 20:15:29,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11002, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11262, PETRI_PLACES=536, PETRI_TRANSITIONS=731} [2024-06-21 20:15:29,963 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2024-06-21 20:15:29,963 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 731 transitions, 11262 flow [2024-06-21 20:15:29,963 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) [2024-06-21 20:15:29,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:29,963 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] [2024-06-21 20:15:29,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 20:15:29,964 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:29,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:29,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1084866667, now seen corresponding path program 5 times [2024-06-21 20:15:29,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:29,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320665465] [2024-06-21 20:15:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:29,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:30,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:30,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320665465] [2024-06-21 20:15:30,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320665465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:30,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:30,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:15:30,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755230173] [2024-06-21 20:15:30,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:30,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:15:30,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:30,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:15:30,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:15:30,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:15:30,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 731 transitions, 11262 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) [2024-06-21 20:15:30,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:30,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:15:30,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:31,609 INFO L124 PetriNetUnfolderBase]: 3657/6115 cut-off events. [2024-06-21 20:15:31,609 INFO L125 PetriNetUnfolderBase]: For 1063274/1063274 co-relation queries the response was YES. [2024-06-21 20:15:31,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49830 conditions, 6115 events. 3657/6115 cut-off events. For 1063274/1063274 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 41573 event pairs, 651 based on Foata normal form. 2/6108 useless extension candidates. Maximal degree in co-relation 49594. Up to 5461 conditions per place. [2024-06-21 20:15:31,691 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 676 selfloop transitions, 67 changer transitions 0/750 dead transitions. [2024-06-21 20:15:31,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 750 transitions, 12838 flow [2024-06-21 20:15:31,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:15:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:15:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 20:15:31,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:15:31,692 INFO L175 Difference]: Start difference. First operand has 536 places, 731 transitions, 11262 flow. Second operand 6 states and 144 transitions. [2024-06-21 20:15:31,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 750 transitions, 12838 flow [2024-06-21 20:15:40,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 750 transitions, 12662 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-21 20:15:40,048 INFO L231 Difference]: Finished difference. Result has 540 places, 733 transitions, 11277 flow [2024-06-21 20:15:40,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11108, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11277, PETRI_PLACES=540, PETRI_TRANSITIONS=733} [2024-06-21 20:15:40,048 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 499 predicate places. [2024-06-21 20:15:40,049 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 733 transitions, 11277 flow [2024-06-21 20:15:40,049 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) [2024-06-21 20:15:40,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:40,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:15:40,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 20:15:40,049 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:40,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:40,049 INFO L85 PathProgramCache]: Analyzing trace with hash 943219350, now seen corresponding path program 32 times [2024-06-21 20:15:40,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:40,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16236915] [2024-06-21 20:15:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:40,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:40,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:40,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16236915] [2024-06-21 20:15:40,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16236915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:40,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:40,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:15:40,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387231039] [2024-06-21 20:15:40,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:40,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:15:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:15:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:15:40,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:15:40,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 733 transitions, 11277 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) [2024-06-21 20:15:40,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:40,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:15:40,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:41,857 INFO L124 PetriNetUnfolderBase]: 3654/6107 cut-off events. [2024-06-21 20:15:41,858 INFO L125 PetriNetUnfolderBase]: For 1054717/1054717 co-relation queries the response was YES. [2024-06-21 20:15:41,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49694 conditions, 6107 events. 3654/6107 cut-off events. For 1054717/1054717 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 41505 event pairs, 670 based on Foata normal form. 1/6099 useless extension candidates. Maximal degree in co-relation 49456. Up to 4949 conditions per place. [2024-06-21 20:15:41,935 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 361 selfloop transitions, 395 changer transitions 0/763 dead transitions. [2024-06-21 20:15:41,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 763 transitions, 13455 flow [2024-06-21 20:15:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:15:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:15:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 20:15:41,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:15:41,937 INFO L175 Difference]: Start difference. First operand has 540 places, 733 transitions, 11277 flow. Second operand 9 states and 219 transitions. [2024-06-21 20:15:41,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 763 transitions, 13455 flow [2024-06-21 20:15:50,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 763 transitions, 13296 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:15:50,379 INFO L231 Difference]: Finished difference. Result has 545 places, 733 transitions, 11918 flow [2024-06-21 20:15:50,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11118, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11918, PETRI_PLACES=545, PETRI_TRANSITIONS=733} [2024-06-21 20:15:50,379 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 504 predicate places. [2024-06-21 20:15:50,379 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 733 transitions, 11918 flow [2024-06-21 20:15:50,380 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) [2024-06-21 20:15:50,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:15:50,380 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] [2024-06-21 20:15:50,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-21 20:15:50,380 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:15:50,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:15:50,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2117172641, now seen corresponding path program 6 times [2024-06-21 20:15:50,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:15:50,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79031871] [2024-06-21 20:15:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:15:50,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:15:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:15:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:15:50,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:15:50,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79031871] [2024-06-21 20:15:50,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79031871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:15:50,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:15:50,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:15:50,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345516003] [2024-06-21 20:15:50,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:15:50,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:15:50,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:15:50,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:15:50,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:15:50,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:15:50,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 733 transitions, 11918 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) [2024-06-21 20:15:50,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:15:50,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:15:50,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:15:52,120 INFO L124 PetriNetUnfolderBase]: 3662/6136 cut-off events. [2024-06-21 20:15:52,120 INFO L125 PetriNetUnfolderBase]: For 1085878/1085889 co-relation queries the response was YES. [2024-06-21 20:15:52,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50668 conditions, 6136 events. 3662/6136 cut-off events. For 1085878/1085889 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 41850 event pairs, 582 based on Foata normal form. 10/6138 useless extension candidates. Maximal degree in co-relation 50429. Up to 5273 conditions per place. [2024-06-21 20:15:52,203 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 670 selfloop transitions, 82 changer transitions 0/759 dead transitions. [2024-06-21 20:15:52,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 759 transitions, 14175 flow [2024-06-21 20:15:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:15:52,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:15:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 20:15:52,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:15:52,204 INFO L175 Difference]: Start difference. First operand has 545 places, 733 transitions, 11918 flow. Second operand 6 states and 144 transitions. [2024-06-21 20:15:52,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 759 transitions, 14175 flow [2024-06-21 20:16:01,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 759 transitions, 13341 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:16:01,267 INFO L231 Difference]: Finished difference. Result has 544 places, 738 transitions, 11380 flow [2024-06-21 20:16:01,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11088, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11380, PETRI_PLACES=544, PETRI_TRANSITIONS=738} [2024-06-21 20:16:01,268 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 503 predicate places. [2024-06-21 20:16:01,268 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 738 transitions, 11380 flow [2024-06-21 20:16:01,268 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) [2024-06-21 20:16:01,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:01,269 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] [2024-06-21 20:16:01,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-21 20:16:01,269 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:01,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:01,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1429614699, now seen corresponding path program 7 times [2024-06-21 20:16:01,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:01,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208783176] [2024-06-21 20:16:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:01,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:01,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:01,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208783176] [2024-06-21 20:16:01,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208783176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:01,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:01,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:01,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717224865] [2024-06-21 20:16:01,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:01,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:01,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:01,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:01,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:01,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:16:01,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 738 transitions, 11380 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:01,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:01,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:16:01,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:03,205 INFO L124 PetriNetUnfolderBase]: 3670/6150 cut-off events. [2024-06-21 20:16:03,205 INFO L125 PetriNetUnfolderBase]: For 1083460/1083477 co-relation queries the response was YES. [2024-06-21 20:16:03,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50220 conditions, 6150 events. 3670/6150 cut-off events. For 1083460/1083477 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 42010 event pairs, 576 based on Foata normal form. 14/6157 useless extension candidates. Maximal degree in co-relation 49979. Up to 5378 conditions per place. [2024-06-21 20:16:03,289 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 673 selfloop transitions, 80 changer transitions 0/760 dead transitions. [2024-06-21 20:16:03,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 760 transitions, 12986 flow [2024-06-21 20:16:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 20:16:03,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-21 20:16:03,290 INFO L175 Difference]: Start difference. First operand has 544 places, 738 transitions, 11380 flow. Second operand 7 states and 162 transitions. [2024-06-21 20:16:03,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 760 transitions, 12986 flow [2024-06-21 20:16:12,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 760 transitions, 12737 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-21 20:16:12,639 INFO L231 Difference]: Finished difference. Result has 548 places, 740 transitions, 11352 flow [2024-06-21 20:16:12,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11157, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11352, PETRI_PLACES=548, PETRI_TRANSITIONS=740} [2024-06-21 20:16:12,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 507 predicate places. [2024-06-21 20:16:12,640 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 740 transitions, 11352 flow [2024-06-21 20:16:12,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:12,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:12,640 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] [2024-06-21 20:16:12,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-21 20:16:12,641 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:12,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:12,641 INFO L85 PathProgramCache]: Analyzing trace with hash -95294181, now seen corresponding path program 8 times [2024-06-21 20:16:12,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:12,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83412235] [2024-06-21 20:16:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:12,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:12,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:12,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83412235] [2024-06-21 20:16:12,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83412235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:12,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:12,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:12,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304418376] [2024-06-21 20:16:12,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:12,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:12,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:12,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:12,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:12,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:16:12,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 740 transitions, 11352 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:12,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:12,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:16:12,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:14,546 INFO L124 PetriNetUnfolderBase]: 3665/6141 cut-off events. [2024-06-21 20:16:14,546 INFO L125 PetriNetUnfolderBase]: For 1073746/1073763 co-relation queries the response was YES. [2024-06-21 20:16:14,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49768 conditions, 6141 events. 3665/6141 cut-off events. For 1073746/1073763 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 41917 event pairs, 662 based on Foata normal form. 14/6148 useless extension candidates. Maximal degree in co-relation 49526. Up to 5474 conditions per place. [2024-06-21 20:16:14,629 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 684 selfloop transitions, 64 changer transitions 0/755 dead transitions. [2024-06-21 20:16:14,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 755 transitions, 12884 flow [2024-06-21 20:16:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:16:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:16:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 20:16:14,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-21 20:16:14,630 INFO L175 Difference]: Start difference. First operand has 548 places, 740 transitions, 11352 flow. Second operand 7 states and 157 transitions. [2024-06-21 20:16:14,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 755 transitions, 12884 flow [2024-06-21 20:16:21,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 755 transitions, 12703 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:21,712 INFO L231 Difference]: Finished difference. Result has 550 places, 740 transitions, 11304 flow [2024-06-21 20:16:21,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11171, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11304, PETRI_PLACES=550, PETRI_TRANSITIONS=740} [2024-06-21 20:16:21,713 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 509 predicate places. [2024-06-21 20:16:21,713 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 740 transitions, 11304 flow [2024-06-21 20:16:21,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:21,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:21,716 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] [2024-06-21 20:16:21,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-21 20:16:21,716 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:21,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:21,717 INFO L85 PathProgramCache]: Analyzing trace with hash -809508621, now seen corresponding path program 9 times [2024-06-21 20:16:21,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:21,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045062798] [2024-06-21 20:16:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:21,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:21,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:21,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045062798] [2024-06-21 20:16:21,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045062798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:21,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:21,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:16:21,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094387586] [2024-06-21 20:16:21,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:21,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:16:21,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:21,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:16:21,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:16:21,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:16:21,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 740 transitions, 11304 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:21,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:21,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:16:21,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:23,533 INFO L124 PetriNetUnfolderBase]: 3660/6130 cut-off events. [2024-06-21 20:16:23,534 INFO L125 PetriNetUnfolderBase]: For 1064061/1064078 co-relation queries the response was YES. [2024-06-21 20:16:23,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49379 conditions, 6130 events. 3660/6130 cut-off events. For 1064061/1064078 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 41792 event pairs, 655 based on Foata normal form. 14/6133 useless extension candidates. Maximal degree in co-relation 49136. Up to 5447 conditions per place. [2024-06-21 20:16:23,613 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 681 selfloop transitions, 69 changer transitions 0/757 dead transitions. [2024-06-21 20:16:23,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 757 transitions, 12844 flow [2024-06-21 20:16:23,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:16:23,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:16:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 20:16:23,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 20:16:23,615 INFO L175 Difference]: Start difference. First operand has 550 places, 740 transitions, 11304 flow. Second operand 8 states and 176 transitions. [2024-06-21 20:16:23,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 757 transitions, 12844 flow [2024-06-21 20:16:31,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 757 transitions, 12697 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:16:31,192 INFO L231 Difference]: Finished difference. Result has 553 places, 740 transitions, 11300 flow [2024-06-21 20:16:31,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11157, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11300, PETRI_PLACES=553, PETRI_TRANSITIONS=740} [2024-06-21 20:16:31,192 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 512 predicate places. [2024-06-21 20:16:31,193 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 740 transitions, 11300 flow [2024-06-21 20:16:31,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:16:31,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:31,193 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] [2024-06-21 20:16:31,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-21 20:16:31,193 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:31,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:31,194 INFO L85 PathProgramCache]: Analyzing trace with hash -818086104, now seen corresponding path program 33 times [2024-06-21 20:16:31,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:31,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9310551] [2024-06-21 20:16:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:31,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:31,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:31,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9310551] [2024-06-21 20:16:31,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9310551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:31,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:31,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:16:31,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147639822] [2024-06-21 20:16:31,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:31,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:16:31,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:31,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:16:31,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:16:31,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:16:31,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 740 transitions, 11300 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) [2024-06-21 20:16:31,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:31,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:16:31,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:33,121 INFO L124 PetriNetUnfolderBase]: 3665/6143 cut-off events. [2024-06-21 20:16:33,121 INFO L125 PetriNetUnfolderBase]: For 1066115/1066132 co-relation queries the response was YES. [2024-06-21 20:16:33,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49528 conditions, 6143 events. 3665/6143 cut-off events. For 1066115/1066132 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 41904 event pairs, 679 based on Foata normal form. 13/6149 useless extension candidates. Maximal degree in co-relation 49284. Up to 4965 conditions per place. [2024-06-21 20:16:33,201 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 369 selfloop transitions, 397 changer transitions 0/773 dead transitions. [2024-06-21 20:16:33,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 773 transitions, 13874 flow [2024-06-21 20:16:33,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:16:33,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:16:33,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-21 20:16:33,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:16:33,202 INFO L175 Difference]: Start difference. First operand has 553 places, 740 transitions, 11300 flow. Second operand 11 states and 253 transitions. [2024-06-21 20:16:33,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 773 transitions, 13874 flow [2024-06-21 20:16:41,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 773 transitions, 13729 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 20:16:41,021 INFO L231 Difference]: Finished difference. Result has 558 places, 743 transitions, 12013 flow [2024-06-21 20:16:41,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11155, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12013, PETRI_PLACES=558, PETRI_TRANSITIONS=743} [2024-06-21 20:16:41,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 517 predicate places. [2024-06-21 20:16:41,022 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 743 transitions, 12013 flow [2024-06-21 20:16:41,022 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) [2024-06-21 20:16:41,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:16:41,022 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] [2024-06-21 20:16:41,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-21 20:16:41,022 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:16:41,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:16:41,023 INFO L85 PathProgramCache]: Analyzing trace with hash -805187934, now seen corresponding path program 34 times [2024-06-21 20:16:41,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:16:41,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159511870] [2024-06-21 20:16:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:16:41,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:16:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:16:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:16:41,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:16:41,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159511870] [2024-06-21 20:16:41,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159511870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:16:41,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:16:41,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:16:41,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960953532] [2024-06-21 20:16:41,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:16:41,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:16:41,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:16:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:16:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:16:41,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:16:41,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 743 transitions, 12013 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) [2024-06-21 20:16:41,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:16:41,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:16:41,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:16:42,980 INFO L124 PetriNetUnfolderBase]: 3670/6152 cut-off events. [2024-06-21 20:16:42,980 INFO L125 PetriNetUnfolderBase]: For 1083177/1083194 co-relation queries the response was YES. [2024-06-21 20:16:43,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50453 conditions, 6152 events. 3670/6152 cut-off events. For 1083177/1083194 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 41992 event pairs, 681 based on Foata normal form. 13/6158 useless extension candidates. Maximal degree in co-relation 50208. Up to 4971 conditions per place. [2024-06-21 20:16:43,066 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 366 selfloop transitions, 403 changer transitions 0/776 dead transitions. [2024-06-21 20:16:43,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 776 transitions, 14299 flow [2024-06-21 20:16:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:16:43,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:16:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-06-21 20:16:43,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-21 20:16:43,067 INFO L175 Difference]: Start difference. First operand has 558 places, 743 transitions, 12013 flow. Second operand 12 states and 267 transitions. [2024-06-21 20:16:43,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 776 transitions, 14299 flow Killed by 15